Eggs & Salt Water - Water Density Science Experiment

[@wenkaizhang5299]

water density< egg density: sink. water density > egg density: float. water density =egg density: stays in the middle. Why would adding salt increase the density of water? The Na+ and Cl- ions fill up the gaps between the water molecules and make it denser. See it as a very simple question but actually is a fundamental of many industrial designs!

[@tkmking8781]

Ml

[@loganthomassen9321]

Virgin

[@tartarsauce2601]

But the one on the right still looks like it has more salt in it than the middle glass

[@rananranu2423]

Super

[@laylawright_hrt7225]

Mhm

[@jfredett]

The third egg stays in the middle because it's actually 'neutrally buoyant" -- Basically, Bouyancy is the property of the outer fluid pushing on the object, forcing it upward. If that force is great enough, it will overcome the weight of the object and make it float. In the case of the third egg, the water is pushing with the same force as gravity is pulling -- regardless of the quantity of water. This means that the density of that saltwater matches that of the egg. Very neat trick!

[@AaronderSchaedel]

The water with the egg floating in the middle had a layer of salt water and a layer of pure water. Because of how the pure water was added, the salt water and pure water didn't mix immediately, and layered themselves on top of one another, causing the egg to float on top of the salty layer, but beneath the pure layer. If that glass were left alone or stirred, the egg would have floated to the top, since the two kinds of water would be mixed, and no longer layered.

[@hakkatanhali]

In the third glass the denser salt water stays at the bottom of the glass and the egg floats on top of it. The less dense fresh water floats on top of that dense salt water. Gradually the salt will disperse through all the water then the egg will either float to the top because all the water is dense enough to float it or it will sink because the water has become to diluted to float an egg.

[@guitarfreak837]

buoyancy and water density, the egg floats because the water is thicker than normal. the other egg sank because the water is normal and a lot less dense. the final egg floated in the middle because it has half and half.. water stayed up because its lighter, salted water sank to the bottom thus leaving the egg in between.

[@cant_standya]

The egg has a slightly higher density than water, so eggs will sink in plain water. Adding salt will drastically increase the water's density. Eggs don't sink because the new solution is so dense. So, salt water is most dense, fresh water is least dense, and eggs are in between. This means that if you combine all three, carefully making sure not to mix the salt and fresh water, the dense salt water should sink to the bottom, fresh water should float to the top, and the egg stays in the middle.

[@vivianadizua8841]

This is it!!! In the first cup, the egg sank because it is more dense than water. In the second cup is brine solution, the egg stayed afloat because brine solution is more dense than the egg. In the third cup, the brine solution is under and egg floats on it and sinks in the plain water that is above.

[@elliottharris7496]

This is how science should have been taught to us. "Woah. This crazy. How does this work? Ok, here's something else cool. Check it out." I feel I would have learned much more, and in much less time.

[@wenkaizhang5299]

+Elliott Harris haha my science teacher in primary school did all those cool stuff. In high school my friends and I made soap out of sodium hydroxide and veg oil, cream out of bee wax and water etc... And that's what got me into chemistry in the end. Now I am in the process of getting a PhD in Chemistry :)

[@anandpraj5754]

Thanks

[@SkyePupGames]

As you move further down in water the pressure rises but the resistance and viscosity does not. So you found we're the eggs has enough upward force to just counteract the downward pressure and not enough to go up any further.

[@nataliagurdado8807]

the denser the liquid the greater its upward life or buoyancy. salt makes the water denser when you add fresh water to the salty water it remains on top. the egg sinks through it and floats on the lower denser salty water.

[@flamedrag18]

exactly, you see this boundary layer effect when fresh water from rivers meet salty or brackish water in a estruary. the fresh water floats on top of the salty water until it mixes.

[@JunkfoodZombieGuns]

"You see? It sunked." XD

[@perrywinklefartsniffer6630]

I thought it float?

[@mabr20]

In the third cup, the mixture isn't homogeneous meaning it isn't well mixed. The water added is lighter so it will float above the salt water diffusion occurs slowly so the mixture even out slowly. Due to that the egg floats on the very salty water but is still heavy to sink in the less salty portion

[@eyesofphysics97]

What is special about the third glass is that since water density is greater the deeper you go (proof is in people getting their lungs squashed the deeper they go) Since you already found the point where the egg will float, just adding water will make the water less dense by decreasing the salt concentration, but the pressure of the new water above increases the density of the water below. These forces even out, bringing the middle water back to the original density. So the egg floats there.

[@slate7639]

It is caused to flow in between the middle because the saltwater that you put in at first was a larger density then the light density water the report on top made it so it would stay in the middle because the light density it's the egg sink send it the heavy density the egg floats in the so then it's an equal combination

[@anandpraj5754]

Thanks

[@Belphemon1]

waaa?

[@odome5743]

He put the second egg in carefully. The density is just right so wherever the egg settles, it stays there. In the second one, it settled on the top, so it stayed there. In the third one, the egg settled at the top, then was pushed down to halfway by the water, where it settled. Its either that, or the bottom half of glass 3 is more dense than the top half when the water was put on top. I'm 14, its not that hard.

[@xXJosafat07Xx]

the first egg sank because the egg is denser than water (1.0g/cc), the second egg floated because it became less dense than water, and the last egg stayed in the middle because it has the same density as water.

[@TheFrankman03]

it's magic!!! The density of the regular water is too much for the egg to float, but the salt in the salt water reduces the density of regular water and the salt water doesn't push down on the egg so much so when you add the egg to the half salt water then it floats, but when you add the regular water it pushes down on the egg but the salt water pushes the egg up putting the egg in the middle. Newtons first law a moving object will keep on moving until an unequal or equal force acts on it.

[@changethename1924]

any object floats when the upthrust (force applied by the displaced water, in the upward direction, to the object) is more than the weight of that object (egg, in this case). now, in the 1st cup... only water is there so the weight of egg will be more than upthrust and hence it will sink... (obviously!! we all know that) in the 2nd cup... there is some amount of salt too... which increases the density of the water... this increases the thrust such that the egg floats.... but in the 3rd cup... if you would have noticed... he added a lot of salt (it appears more opaque than the 2nd cup too... right?)... this makes the upthrust EXACTLY equal to the weight of that egg!!! hence it neither floats (when upthrust is more than weight of egg)... nor sinks (when upthrust is less)... instead, it gets completely submerged in the liquid and stays in the middle... Remember.... both weight and the upthrust are forms of force... one acting upwards(upthrust) and the other in downward direction(weight)... so whichever force becomes stronger... dominates the other... when weight becomes more... it pushes water aside and egg sinks... when upthrust becomes more... it pushes egg upwards... and the egg floats... but when both are equal... equal force is applied on the egg from upward as well as downward direction... thus, it stays in the middle!!! simple science logic... the "ARCHIMEDES PRINCIPLE"!!! :)

[@brigvadirgeneral]

i did this for my science fair and I got 2nd THANKS FOR THE VID LOL

[@bxpplle]

SAMEEE

[@markusdammasch9108]

Because the water you poured on top was fresh water and did not mix well with the salty water when you poured it in. So the egg still floats on top of the original salty water, but not on top of the new water because it is not salty enough.

[@ChampFencer]

1. Water density 1.000 and egg density about 1.020 depending on weight/size. Therefore in clear water an egg will float. 2. Salt water density about 1.025. Thus, the egg will float. 3. Salt been mixed into the salt water portion on the bottom making it denser than the fresh water at top. The egg is between the two densities so floats in middle. Salt water will eventually mix with the fresh water over time and the egg will sink. No immediate reaction because the water already absorbed the salt.

[@HarleyPebley]

Most likely the last egg is in the middle of the glass because the water above is less salty (i.e. has a lower density) than the water below. Therefore the egg floats on the salty water at the bottom and sinks below the non-salty water above. Alternatively, the egg's density is in perfect equilibrium with the water's and so neither floats nor sinks. Given the apparently unmeasured quantities of salt and water, this is unlikely though.

[@Zlangbartels]

The third egg stays in the middle because there are two densities as the two solutions have not mixed. If you stirred the mixture up, the egg should float to the top

[@mirandaflanagan4525]

The water in the bottom of the cup was denser than the egg so the egg float on top of it but the water that you put on top of that was less dense so the egg stayed at the top of the salt water and at the bottom of the regular water. (The reg. Water was hot and the salt eater was cold, because hot water the molecules are far apart so its less dense and cold water the molecules are closer Coldwater closer together so its more dense)

[@Jorgen223]

different densityies dont mix thats why there are underwater rivers of really salty water ,the salty water pushes the egg up the not salty water pushes it down thats why it is floating in the water

[@gem03103]

because in the third you dont stir it making the salt from the original water have more salt so the density is greater in the bottom than in the top causing egg to float

[@nbarrager]

We are learning about density in school and I recommended this video to my teacher and he showed it to the class! you are awesome!

[@wutsdat9047]

Well by what I see, I can tell the egg has a larger density than the regular water, so it sinks. (Regular water has a density of 1.0 g/cc, or grams per cubic centimeter. Salt water has a density of 1.2 g/cc.)Because it floats in salt water, I can tell it has a smaller density. So, when you have the salt water, the egg floats to the top until you add regular water, which is less dense than and egg. That's what causes it to float in the middle.

[@اماميرةحبيبة]

Winchfloatsinwater,a normalcanofcolaoraconwithoutsugar

[@keithguernsey6968]

Excellent

[@viliussparkis8408]

in the regular water the egg is sinking because his density is bigger than the water and Archimedes force is smaller than gravity force. in 2nd glass the egg is floating on the top because water density is bigger than egg and Archimedes force is bigger than gravity force. in 3rd the egg is floating in the middle because the density of the egg and water is pretty much the same as the Archimedes force.

[@danaghosheh5444]

the water that was only filled up to the middle stayed ln the middle because you added al itle bit off salted water and a little bit of normal water so the normal water would want it to sink and the salted half would want it to float, this brings us to the answer that it would be even so it will stay in the middle

[@jacktollo]

the salt was poured in before so the density is set there so adding the water just sits the egg in the place it was originally

[@CaptainEverythingHumorandMore]

The last glass, I think the water didn't mix all together. You have salt on bottom and fresh on top. Maybe after a while they will mix and the egg will float to the top or sink to the bottom. Cool experiment.

[@Simxor]

It stays in the middle because of the salt still being heavier than the egg, if you'd stir it a bit the egg will either sink or float depending on the amount of salt youve added

[@NLbr4incracker]

because the soulty water dsnt mix properly with the regular water you put on top of it, so you get like 2 layers on water, which it wil sink in the normal water but float on the salty water it will stay inbetween

[@RipStikDude100]

The salt stays at the bottom of the glass and the egg sinks in the non salty water but cant go any further when it hits the salt

[@Goldbloodd]

it si due to the gravity of the liquid you can do the samething with sugar and a good secondary example of this would be to ferment sugar water with yeast and you can gauge how dense the water is and tell the alc.vol.

[@imakeusmile551]

The salt water in half of the glass lets it float while the other half pushes it down so it stays in the middle

[@allenrivers1]

due to archemidies principle the amount of displaced fluid is less in the salt water causing the egg to float

[@TyrannosaurusGamer57]

Water: since the egg is heavier than water it sinks Salt: Like the ocean, salt helps you float so since the dead sea has lots of salt so it's almost impossible to drown Middle: It's both of them combined, salt makes it float then regular water is added and so tap water makes it sink. So even though it looks like it has salt, it really doesn't.

[@marcelnordhausen2362]

the egg stops the mixing of the two solutions. the satwater is pushing up the egg, but it can´t swim in the low-density-water-phase above

[@drycrazyhi]

salt makes water dencer duh. also on the third one the half cup of salty water was dencer so it staied on th bottom of the glass and held the egg while the water frome the bottle was ontop of the egg

[@Giggaxwattzzz69]

The reason this happens is becuase the salt water that was holding the egg is in the center the regular water is above the salt water. Therfore it stays in the position that supports its weight.

[@goodman1997good]

Salt water is more dense then the "clean" water causing the egg it sinks until it hits the Dense water it cannot sink due to the salt (the salt takes the extra space in the water making there be no room for the egg)

[@MrStars71]

It happens because ur making it more dilute ( half salt half water... Less dense than just salt) which makes it stay in the middle, if you were to put just tap water and just salt water it wud stay in the middle

[@aleksi503]

Well if you fill a glass of water and you put the egg in there it will enjoy it but if you add salt it will feel insecure and that kinda of stuff, thats why the egg floats its an magic egg either way.

[@theshoeshowify]

The salt is more dense than the water particles which makes the egg float at first and when you add water, the egg stayed where it was before you added water because it was more dense then the water particles on top but less dense then the particles at the bottom

[@darrenspence8482]

The salt in the water makes it go up but since more water was added the water us trying it push it down which causes it to balance in the middle

[@BFF804]

The glass filled with salt carries the egg because the salt is holding it up. The one filled half way with salt stays in the middle because you only filled half of the cup with salt an than added more water.

[@dryskullbones8088]

the water makes the egg sink while the salt and water makes it float, but the third one, it is a mixture which will make it float in the middle!

[@StevenAcunaBG05]

The pure water is sitting on top of the salt water because it is less dense than the salt water. The egg is floating on the salt water and sinking in the pure water. And since the pure water is on top and the salt water is at the bottom, the egg stays in between.

[@Brian123u]

It's like when you make a density tower with just 2 liquids when you flip it around it moves around because one is denser than the other so the glass is half freshwater and half salty even though you can't see it you can think of a density tower when the egg floats in the middle

[@drewnichoson4628]

I love this dudes broken English.

[@brendanminecraftfilm]

The regular water poured in dilutes the salt water making the density of thr water the same as the egg

[@KookieGawd]

1. egg is denser than water, so the egg sinks. 2. salt water is denser than the egg, so the egg floats. 3. salt water and the water you pour will not mix because they have different densities, making two group of liquid with different densities in the glass. So the egg will be in between the salt water and the water without salt.

[@JesupBedumir]

The egg stayed in the middle because the salt sunk to the lower half of the glass and the regular water stayed in an upper half, making a balance for the egg to stay in the middle

[@kaosz7777]

Salt has a higher density than water and when desolbed atill containes a certain density and mass. The mixture that made the egg float in the middle is no more than an oil water and honey expirement. (all the different layers of density seperate) the egg is pushed up by the more dense water as the egg has a lesser density as the water has a bery low density and the egg has a higher density and sinks. The reason tje egg was in the middle was because of the two layers. Lighter than salty water an

[@MrSproeier]

Salty water is heavier than regular water, so If salt water 'push the egg up and the regular water (lighter than salty water, it will float above the salty water) push the egg down, the egg will stay in the middle

[@Thanos_Jax]

As a kid I CURIOUSLY asked about a PARTICULAR question back when I was in elementary school… here it is: “What makes the salt able to make the water lifting the egg…?” The teacher went blank…

[@marinkoparilo5855]

when you put the egg in the 3 glass it is in the meddile and when you add water it goes on the top of the salty water

[@magnitization]

The density of the salt water on top pf the egg plus the gravitational force keep it down while the force of all of that on top of the lower layer off salt water is slightly compressing it making the egg stay in the same place....best I could explain it without drawing it. Maby ill just make a video response

[@syedmahin9319]

How many hours it remains

[@jacker372]

the egg has the same density as the water ... OR the water has a higher density at the bottom Holding it just above that point

[@enaea3448]

My friend, moder rusha yeaaaa.... The reason why the egg sinks on the first glass, is because the salt is completely dissolve. The second glass, plain water no density. third glass, water is mixed with salt and dissolved to where the egg floats just like the first glass, now with water added into the first glass the bottom of the cup with a disolved water act as a layer and keeping the plain water from going below because it was not mixed with salt.

[@crucible315]

Stacked Density. The Egg is suspended between different water densities.

[@FabFinnie]

That is how u kinda test if a egg is raw the more raw an egg gets the more oxygen that develops inside and it will float but i new egg will not and half and half it will be neutrally boyant and stay in the middle

[@shannyndale77]

Are the eggs boiled? Or are they not-cooked?

[@TheMapleMechanic]

The regular water les dense then the salt water so since it isn't mixed in it is les dense on top so it floats in the middle

[@micmiranda2051]

It works because the salt part of it is the only dense part and the water destroys that but not completly so it will end up bein submerged in the held way mark just like in yor awesome video !

[@nathanielpermejo9353]

When u put the egg in the salt water its float and when u added the regular water it's stays on the top but if you mix it the egg will float

[@RandomPerson-wz6pr]

Erm....because the half empty was filled with water?so the difference density between both of the liquid ( water and salt water) make it like that?

[@muhammedash1]

1st Glass (Regular Water): The Egg Is Denser Than The Water So It Sinks 2nd Glass (Salt Water): The Salt In The Water Makes It Dense So The Egg Floats 3rd Glass (Salt Water + Normal Water): Just Like In Glass 2; The Egg Floats. But This Time Water Is Added, The Fresh Water Is Still Less Dense Than The Salt Water So It Floats On Top. Basically There Are 2 Separate Layers Of Water, The Egg Sinks To The Bottom Of The Freshwater Layer And Floats On Top Of The Salty Water Layer (Middle Of The Glass).

[@hiddenpanda02]

look at how to make a density tower thing and if you understand things then you will under stand why it floats in the middle

[@donfoster5576]

The salty water is more dense, and the fresh water is less dense. Providing that it doesn't mix too much, then a density gradient exists... more dense on the bottom, less dense on top. The egg sinks through the less dense water on top until it reaches the more dense water halfway down. Then it floats on the more dense water.

[@wenkaizhang5299]

+Don Foster I think you are only partially right. I do believe there could be a density gradient. But since here he is doing the experiment under room temp, the truth is that the termodynamics under room temperature atomospheric pressure is considerably high. The density gradient would be not significant enough. I suppose the density is just similar to the egg that is what makes the egg float. You could disscuss this question with a chemist, physicist or a chemical engineer, and may recieve slightly different expanations because we all think differently. Personally think the best way is to modle it on computer with a software called DL_POLY, which is based on molecular dynamics. ---from a person of a chemistry profession.

[@WickedFalsehood]

they are actually just tinted safety glasses usually used at shooting ranges

[@XJOHNJOX10X]

The water is resting on top of the salty water so the egg sinks until it reaches the salty water when it floats

[@GGNKNK]

because the water is half salt and half clear and water with salt "grabs" the egg and clear water pushes egg up and egg stops in the middle

[@qaroqchi]

Regular water will be on top of salt water. If you had food coloring on the third class of regular water you could see the regular water will be on top of salt water

[@TomGreen99]

Do you drink the salty water after and the eggs (like Rocky!!)?

[@Tness360]

The egg is the same density as the salt and water solution, thus leading it to float anywhere in the glass.

[@aba2k9]

The salt water doesn't mix with Normal water so it's sunk down the of the normal water which is the middle it also meets the saltwater in the middle that's why it floats in the middle

[@josephperez8148]

Well actually if an egg isnt fresh it will tend to float bcuz of the air bubbles that form within the inside of the egg, & on the other hand a fresh egg will sink bcuz of the weight&the fact that there is no air bubbles in it

[@Kai-Made]

salt water makes an solution and the solution has a different electrical charge than the filtered water you added...if you wait long enough the egg in the third glass will eventually float all the way to the top.

[@Cosmic.Perspective]

Both forces cancel each other and keeps the egg balanced in between

[@DoctorWhovian101]

That is the best scientifical explanation I have ever heard.

[@namywdraco]

Saltier water is beneith, so it floats on the salty water, and less salty water is on the top, so it stays in between the two.

[@jakehoesyo]

The salt water is more dense than the normal water. The normal water stays at the top. The egg sinks to the middle because it is more dense than water but less dense than salt water

[@williamsajay2003]

Maybe the brackish water does this because it has the properties of the other glasses?

[@Awg1008]

I'm gonna use this for my science fair project

[@KhannJatt]

Hydrostatic Pressure increases with depth. This expression will Tell you what's going on.. O [Upper Surface of Egg has lesser pressure then lower surface of egg. Pressure bcz of Egg weight+pressure at upper surface of EGG by water in downward direction = pressure exerted at the lower surface of Egg to upward position(buoyancy) by water] . Density : egg=water.

[@kalyanibethina]

did you use a boiled egg or a normal egg?

[@topotau]

first one: egg is more dense than water so it sinks. second one: egg is less dense than salty water, so it floats. third one: at first the half filled salty water is more dense than egg, so the egg floats, but then the added water which is not salty, layers on top of salty water without mixing, so the egg floats on top of dense salty water, but stays underneath not so dense normal water that didnt mix well with salty water. in short: bottom to top- Very dense water> dense egg> not so dense water

[@iMusical4]

is it because the water and the egg are of the same density?

[@diegoloya5292]

When you add water to the 3rd cup, you pour just the right amount so that the density of the egg and the density of the water are the same. Therefore the egg is suspended in the middle.

[@ooch]

are you sure the 2 eggs that float aren't old cause they do if they are

[@sconnietransplant_7163]

The two opposite water pressures. You can kind of think of it by putting the north pole of two magnets together. They repulse each other

[@tyrosine911]

Non salty water has a bigger dentity than nrmal water, so noral water stays on top of the salty water (the actually is two seas that happen to do that too) so the egg floats on the salty water and sats under the less salty water. SCIENCED!

[@Ifreatking]

Basically: You can drink that water, the egg sunk. Don't drink the middle water, it's salty! You can't even drink that gunk on the right, you'll just explode into a pile of salt.

[@CalmoDS99]

The salt is pushing the egg up and the water on top is pushing it down so then it floats in the middle. :)

[@DivingHawker]

3rd glass : you didn't mix, right? Well there are 2 phases : water at the top half and salty water at the bottom half. The egg floats on the salty phase and sinks into the water phase. Here's your explanation.

[@wutsdat9047]

He did mix.

[@wenkaizhang5299]

+DivingHawker oh you are partially right. But overall not right. There is some undissolved salt at the bottom of the 3rd glass due to poor mixing. And since the salty water is not saturated, I do expect the salt at the bottom is still trying to dissolve into the water. But under room temperature, the thermodynamics of the molecules are already at a considerable level. The overally mixture I would expect to be roughly homogenous all the way through (maybe with a slighly denser region closer to the bottom). But he did reach the right density (=egg density) for the egg to stay in the middle. The amount of dessolved salt in the 3rd glass is definitely less than the second one. ---person who did a chemistry major and has a master degree.

[@hashugill3566]

wutsdat of

[@jameskrug87]

0:57

[@Slithy]

Depending on the difference in density the egg should go either up or down, very slowly. The thing here is - salty water is more dense than clean water, so if you add clean water from the top - it actually doesn't mix up that good. So the density of that liquid increases as you go to the bottom. And the egg doesn't go up because it's more dense than the liquid above, and it doesn't go down because it's less dense than the liquid below. If you know what i mean.

[@madisonhudson1135]

So is the egg a non boiled egg or is it a hard boiled in so confused about that??

[@flamemik]

non-boiled egg

[@ajayjhalli9732]

Because when he puts it the suger gos up so it pressures the egg so the egg does the same thing