Molarity and Dilution

[@ProfessorDaveExplains]

Guys, at 0:30 I say "moles solute per liter of solvent", but it's per liter of solution! What a dumb mistake on my part, but it's an important definition to get right so please take note.

[@parulaggarwal9405]

It's ok😄

[@caribaez5711]

Thank you for letting us know.

[@calebkaufman7852]

PROFESOR DAVE GROHL

[@Hockeyjody]

you also need to better explain how you got .5 as your asnwer from (1.0M)(1.0L)= M2(2.0)

[@filosofo-sz5ks]

@@Hockeyjody I'm a bit late, but it's supposed to be an equation from the algebra class.

[@80milekyle70]

I love the quiz music. They should play that during finals

[@BRuvSt0AsT]

yes

[@louisclexvi7200]

you just helped me pass my exam basically. you magnificent man.

[@paigejohnson9201]

Thank you for making this so concise, while also making it clear! Helped me a lot with my classwork. :)

[@kyokokirigiri100]

I try to be serious and focus but the face at 0:08 fucking kills me lmfao

[@IvoryOut]

Short, to the point, incredible explanation. THANK YOU!

[@phenomenalphysics3548]

1:21 does that mean that even after adding more solvent volume of solute remains constant?

[@gabriels2395]

I would say YES. Because the volume of solute only increases by adding more solute. Now it is the CONCENTRATION of that solute the one that changes if the volume of solvent is altered. This because the concentration is a "ratio" between the solute AND the solvent.

[@phenomenalphysics3548]

@@gabriels2395 thank you

[@AbdullahRizwan-qo1xv]

The most underrated teacher ever

[@yashcaroicar4542]

cool video...super helpful .... what animation software do you use?

[@ProfessorDaveExplains]

adobe after effects!

[@tb2748]

Can someone explain the intuition behind why dilution can be represented with the M1*V1 = M2*V2 equation? I don't want to just blindly use the formula - would like to know why it works. Is there a way to do these dilution problems with dimensional analysis?

[@ProfessorDaveExplains]

well concentration and volume are inversely proportional, if you double the volume of solvent, the concentration will necessarily be cut in half

[@tb2748]

@@ProfessorDaveExplains Super fast reply, thanks!

[@adrianbernardaguirre1050]

Hi just gonna ask if you are converting mL to Liters you should divide it by 1000 right? should it be 0.2L or 0.200L? the answer will be different but only in decimal places.

[@ProfessorDaveExplains]

yep that's right. number of decimal places will depend on the number of sig figs present.

[@samsonkatende2696]

you have helped me big time ..i appreciate

[@1NikkiPink1]

First of all, thanks for the great videos. I just have a quick question. Are you supposed to add the mass of the solute to the solvent to get the total mass of the solution? I don't know this for certain, and want to make sure I am doing the right calculations. Thanks in advance. *Edit* Mean't volume, not mass.

[@ProfessorDaveExplains]

well here mass doesn't come into play, as molarity is moles solute per liter solution. but there could be other applications where mass is relevant.

[@1NikkiPink1]

So the volume of the solution is the same with or without the solute inside? That's what I meant.

[@1NikkiPink1]

I confused mass and volume. Sorry.

[@ProfessorDaveExplains]

oh, yes! i know it seems weird but solute will fit into the spots between the solvent particles and won't impact the overall volume, so if adding a solid solute, we don't have to factor that into the total volume. of course if combining liquids, we do add the volumes.

[@1NikkiPink1]

Excellent! Thank you so much again!

[@bringbackmemesineurope1576]

what calculations did u have to do to get 0.600L of water? great video btw

[@etewis87]

Holy hell I couldn't remember this simple equation for the life of me trying to figure out a concentration problem. Clutch. Thank you!

[@JanaJana-rx6jt]

Thank you very much fav teacher professor dev🎉🎉

[@alihave1]

your channel gonna be the best😍❤️

[@lilnugget2280]

thank you professor dave👑

[@Zak-qp5ln]

thank you professor dave 👑👑

[@tempestlll9638]

thank you Professor Dave👑

[@hadiharhous4287]

Thankyou professor Dave

[@Raantas]

I got the answers right. Thanks professor

[@aluminiumoxide8750]

Is proportional dilution same as stock dilution ?

[@zwoomy2769]

It is 4am, i got a chemistry quiz this morning, and I'm trying my very best to sort this in my brain 😭

[@zhonglishusband6988]

My exam is in 1 hour and im looking for the shortest vid to cram

[@nataliecorrea5417]

A bit confused in re to dilution - how do you get the value of M2?

[@ProfessorDaveExplains]

it's all just algebra, plug in what you have and solve for what you need

[@nataliecorrea5417]

@@ProfessorDaveExplains woah! lightening response time - thank you so much!

[@ladyt2588]

U need to remake the video with that correction or insert the caption in the video. The description notes isn't enough

[@ProfessorDaveExplains]

Well that sounds lovely, except that it's not possible.

[@EmeraldQueen206]

Where did the 74.1g come from?

[@Bookshelf823]

I just learned 2 months worth of chemistry in 2 minutes

[@muhammad922]

Thanks prof. Great

[@honeydip1031]

How did you get 74.1 g? in the comprehension portion of the video?

[@ProfessorDaveExplains]

molar mass of calcium hydroxide

[@ITSLIZZ111]

from the periodic table

[@ryanwilson8677]

You go Dave!

[@bio366geethasankar7]

🙏🙏🙏

[@nadiahulwat.1788]

What about Precipitate kind of elements, its that count in this term as well? Anyway thank you Prof. Dave💎

[@MrCsScience]

Molarity = moles of solute per liter SOLUTION, not solvent. I like your videos and the way you explain, but can't use it w/my students as they'll be confused :(

[@ProfessorDaveExplains]

there's an annotation in place that makes the correction

[@ludwigliu4877]

The solubility of calcium hydroxide is really low so I think the question at the end is not feasible at all Professor Dave

[@user-py5fj1ce2c]

limewater?

[@hadiharhous4287]

Thankyou professor dave

[@sardarsourabhsingh5243]

Thanx prof. Dave

[@BharatSharma-f7f]

Prof Dave you are wrong it is per liter of the solution and not per liter of the solvent in case of molarity

[@ryanwilson8677]

Love the Elevator music

[@yashodhanbarve3581]

thank you chemistry Jesus

[@rassimsimou1594]

Good

[@caribaez5711]

Chemistry looks pretty cool

[@trapjawguch3247]

It’s extremely hard though

[@caribaez5711]

Tråp Jäw Gùłçh it’s not that hard. I actually wish I could take more courses. I am taking dosage calculations for nursing and I am struggling. That class is mostly chemistry and math. I feel I am smart person, but the class is two days a week and the teacher seems she expects us to understand what is going on. In my opinion, she is sort of neglectful when I ask her questions. I feel I need to open up my mind more about chemistry.

[@ryanwilson8677]

Ohh and love the hair and beard. Nice job.👍

[@alicechalwe2245]

Thanks..

[@aarushprasad4493]

can i have ur autograph

[@gothicsounds8042]

I cant under stand ￣へ￣￣へ￣￣へ￣￣へ￣￣へ￣￣へ￣￣へ￣￣へ￣￣へ￣￣へ￣￣へ￣￣へ￣

[@waqasmaqbool3759]

Why we call solution in molarity instead of solvent ???? Quick

[@ProfessorDaveExplains]

What is the question?

[@elitehumpty3603]

solvent is part of the reaction. Molarity is literally the answer it is also called the solution.

[@trevcymanagementllc1528]

chest hair for the win😂

[@cristhiangarcia5991]

love to the chemistry lord Jesus!

[@kripashankarshukla4073]

Sir you explain very well and reply to all the questions. I asked 3 questions through comment and you replied to all of them after 1 or 2 hours. You are superb

[@ProfessorDaveExplains]

i do my best! please tell all your friends to subscribe!

[@kripashankarshukla4073]

Yes sir, sure

[@hueyguo731]

thx！：）

[@gregmosier5908]

Dave, the thumbnail of this one has you with your mouth open :-)

[@davidrenteria9585]

best fkin teacher ever... my respects to you mannn woooow , God bless you!

[@anilshewalkar9914]

The 41 dislikes are of fools

[@ryanwilson8677]

Peace out ✌️

[@tonyzhao409]

have someone ever told u u look like Jesus

[@ProfessorDaveExplains]

many times, my friend.

[@tonyzhao409]

Professor Dave Explains hahaha and also u didnt teach me shit

[@tonyzhao409]

Professor Dave Explains jkjk i luv u .

[@raffih5236]

yeah

[@ariannakraljic6237]

I thought he looked like Lord Farquaad

[@ryanwilson8677]

Look at that chest hair!

[@JATINMANISHI2007]

Bro looks like AI generated

[@ryanwilson8677]

Tootorials lol

[@chari3440]

Do u alone make these videos??

[@ProfessorDaveExplains]

yeah!

[@Zak-qp5ln]

thank you professor dave 👑👑

[@tempestlll9638]

thank you profesor Dave 👑