Worked example: Determining solute concentration by acid-base titration | Khan Academy

[@AmineChM21]

Gotta love khan academy helping so many kids all over the world

[@edream2513soccer]

When you learn nothing from college and everything from khan >

[@Peter_1986]

I passed an entire exam in Differential Equations just by watching Khan Academy and reading the ODE sections on Paul's Online Math notes, lol.

[@jaredmorales9763]

Laurelindo exactly school just makes us pay to receive a test and watch khan academy and re-learn material , that’s it !

[@exelsius4442]

@@jaredmorales9763 we only pay universities and colleges for a piece of paper that says that we graduated :/

[@relaxingandedits5340]

Bananas

[@kimberlyhaynes9389]

You have no idea how long I've been struggling with this. Then in less than 10 mins you help me understand make me happy to be doing chemistry again. Thank you.

[@SKC_Digital]

Thank you so much for this! I would have done so badly on my chem test otherwise

[@muzzammilsajid]

You could use: MV/n = MV/n n being the moles you obtain fron the balaced chemical equation.

[@diane3094]

I didn't know this was easy, Thank you so much 😁

[@relaxingandedits5340]

Potato 🍠

[@peterfarrow8021]

life hack: put Khan Academy on 1.5 speed and they talk like normal humans

[@caesium_]

thank you. :)

[@relaxingandedits5340]

Lanati

[@relaxingandedits5340]

,💩

[@nurlybektoktarov469]

😅😆

[@Qubit313]

😂

[@n.sambedprakashpati3271]

its not that we multiply by two in every question the real shortcut is= normality *v1=normality *v2 and normality=molarity * n factor

[@KunaiKrazy]

I watched these videos for all of my Chem 2 class because my teacher taught me very little and I had to teach myself. So glad he gave me a pity C.

[@relaxingandedits5340]

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[@harshithavenkateswaran7034]

lol what happened to me so I wouldn't fail 😂

[@sabreadillard168]

Yay I finally understand titration :D just in time for chem final today at 7 :D

[@butterfacepilot]

Sabrea Dillard same situation here :D

[@adriancoleman2876]

and us big kids.

[@seantyexdee]

ap chem exam tomorrow and this really saves my life

[@relaxingandedits5340]

Trump

[@shivrammohan9081]

You are saving a lot of Indian kids

[@Peter_1986]

Here is the general equation for this kind of problem: *C*V/B = c*v/A* The variables C, c, V and v are the concentrations and volumes for for HCl and Ba(OH)₂, and B and A are their number of moles.

[@faridb40]

Excellent video! Really helped me for my exam!

[@Princ3Shun]

(Number of H+)MV=(Number of OH)MV wouldn't it be easier to understand?

[@scarlettkelley-hhs2472]

+Shun Prince That is what I teach my kids too! Not confusing to them at all if they understand that!

[@adittyamittal4090]

Yeah or just simply say MVx 'n'Factor

[@superemepwr]

Jay was too busy making his voice higher

[@خهیالیمنوتو]

Shun Prince okkk very god

[@خهیالیمنوتو]

Shun Prince number H3po4 is.........3H

[@kisaflwr]

Best ever video on titration!

[@benkrauss5041]

It took me half an hour to find a video for what I needed. Thank you so much!

[@jerrykarl9667]

Very clear and easy to understand because of the way he illustrates and explains.

[@ibrahimh.2828]

Aren't you supposed to divide by the total volume? Or is that just when you are solving for the pH of a titration..

[@sarahholland5980]

Thank you for saving me for my test tomorrow, I was staring at my notes and I was so confused!!

[@Laura-qx5je]

thank god for this video!! Finally I understand it

[@relaxingandedits5340]

F off

[@eco.3977]

Thank you Khan Academy for helping me learn things the public education system didn't give an f to teach me

[@simeonsechrist8600]

If you are doing this for chem class make sure that you check with your teacher if the short cut is ok. I learned the hard way :)

[@edenhazard7971]

Yeah, I have an a level chemistry exam tomorrow. Defo failing

[@shadowrayTV]

did you fail?

[@neyo231]

we need an update fam

[@joezetts8373]

so how did it go

[@nismadahal4318]

Thank you and that was easy which I did not think of

[@Samora-rz1fk]

Thx got a test tomorrow!!!

[@butterfacepilot]

Great video, understood it all with my very tired brain, the night before my exam

[@AhmedEl-Gazzar]

you can just calculate the normality of Ba(OH)2 to be 0.0308 then using (N*V)=(N*V) to solve for HCl Normality by (0.0308*27.4)/20 = 0.042196N which is also the Molarity as Valency equal to 1

[@rachits9980]

This is the best way to solve for it. good stuff

[@Berghiker]

@5:43 Is that 2.11% concentration of HCL or 1.5% may be correct?

[@michellec.4291]

Thank you Khan Academy !

[@simonloos2092]

How did you get the BaCl2? Im confused on where the 2 came from and Ive watched 10 times

[@parth19930]

i love your videos......seriously!!!!

[@shantiazizian3574]

love your videos mate

[@UnL1k3]

Thanks! I can finally understand titration

[@deepjiwan5500]

Hey...in the 'shourtcut method' using mole ratios does the trick... To say; Ma×Va = Na --------------------------- Mb×Vb=Nb Where; Ma is molarity of acid Mb molarity of base Vb volume of base Va volume of acid --------- means divide lol Na number of acid (from ratio) Nb number of base (from ratio) Thanks for the video great Hope i helped with my formula

[@Majaschoice]

saving my life thanks

[@xenomads]

Thank you so much

[@Mikehuskey10]

shouldent the volume be in liters for the mv=mv calculation

[@sb6512]

Thank you!!!

[@relaxingandedits5340]

Np

[@johnespellarga6126]

Do you do the same if you find the molarity of base?

[@Nicolle0sakura]

very helpful!! Thank you.

[@YoussefMohamed-mf9fc]

Dating?

[@shahab8052]

Thank you! This is amazing👌🏻

[@relaxingandedits5340]

,,🌚

[@JasonSmith-ot4zd]

when you round up the volume for both using the shortcut way and multiply that by 2 you actually and then divide that by the conc of de base you actually still get the same answer too

[@JasonSmith-ot4zd]

That's why you always need to balance the equation before calculation

[@amlandutta.29]

Thanks man!!

[@relaxingandedits5340]

Women

[@relaxingandedits5340]

Wonderwoman

[@Eric_Nguyen.]

What if you are given V1 and VH20 as a base what if they tell you to calculate M1 and they give you an mL and 0.13M, but that is all. They only give you NaOH and nothing else. They give you the volume and on NaOH and nothing else.

[@dorrinsotoudeh7631]

What if u use Acid. Base MVn=MVn n: stochiometry number of acid and base

[@yumenoritsu]

Thank you :)

[@bartek4536]

Well explained thank you. C1V1 = C2V2 always for me. Just account for the ratio at the end. And what`s the problem with that I don`t know.

[@nathanielsabtoe1657]

yeah the ratio kinda confuse me

[@Domain821]

SUPER LIKE . THANK YOU

[@relaxingandedits5340]

Muaah

[@454shrihanwalawalkar4]

awesome vedio but could be easy if you use simple values

[@TheRoxas13th]

Do we really need to balance the neutralization reaction?

[@TheBolinhadigudi]

sure

[@TheRoxas13th]

Okay. Don't know why i asked this question.

[@roberteospeedwagon3708]

If you have something like, Ba(OH)2 + HCl, you can't know the ratio without knowing how much water it produces, which you would need to balance the neutralization reaction. You don't have to, it just helps you get the correct balanced equation

[@relaxingandedits5340]

My brain is balance d

[@wouterenbob]

Do you have any extra exercises?

[@relaxingandedits5340]

Downward dog

[@ItzMoZay]

really good video, however i did not understand how you changed the answer when you divided M by the L. and changed the whole number without explaining.

[@nicholashaynes3483]

Don't have to take into acct that Ba(OH)2 produces 2 equivalents of OH?

[@xvixii3657]

When the question says 'concentration', does the concentration refers to the 'mole' or 'molarity'?

[@salmanmahyuddin8384]

molarity i think

[@bhushangayake2840]

"What volume of 1.00-molar ammonium chloride must be added to 1.00-liter of 0.100-molar LiOH in order to achieve a pH of 9.4? " Please help me with this

[@hannah-joycandy1247]

Where did the .0200l come from??

[@wmd222HxC]

Would someone help me find a way to convert molar to percent?

[@emma-ts1eg]

2:08 how did u know Ba was 2+ and Cl was 1-

[@prxnv]

I don't understand how Barium Hydroxide has molarity/concentration of 0.0154 M. If its just by itself and not dissolved in anything, and calculating molarity requires solute and solution, what did he do to find molarity?

[@RUSALOSA]

what if I don´t have ml for the acid?

[@hudsonwebb7710]

For the shortcut do u always milt by 2

[@tejaskulkarni6041]

no, once you find the balanced equation, then you will know what to multiply by. It will differ for each reaction. In this balanced equation, we saw that there were 2 mols of HCl for 1 mol of BaOH, so to find the concentration, we would have to multiply the "shortcut answer" by 2.

[@dishango74]

why in earth will someone dislike this??

[@marygracebuni4575]

I shouldve just paid khan academy my 2020 tuition

[@EveryoneHarmonyPeace]

good I got 0.0422M as well

[@omnimatt2239]

If you use the "shortcut" don't you just add in moles to the equation on each side?

[@kerenelvir6805]

Well, on the first problem it's moles over liters, not milliliters.

[@plasmatic5593]

fk chemistry, but thanks to you I understand a bit lol

[@jackbailey9714]

Why don't you write the net ionic equation?

[@cyphatmaudzu1995]

Am really desperate of this stuff .... going to have end of semester exams tomorrow

[@puppetactor2515]

My teacher taught us dm instead of L, is there a difference

[@bjehulk]

You just have to convert

[@puppetactor2515]

+bjehulk How?

[@xBIJOY]

you don't have to convert because L is dm3

[@xBIJOY]

you don't have to convert because L is dm3

[@Peter_1986]

1 dm³ is the exactly same quantity as 1 litre, you can just pick any word you want. If you imagine a cube where each side is 1 dm long then you can quickly realise that a box of that size would probably hold about one litre - which it does. As for converting between units in general, search for "dimensional analysis".

[@jairuslirazan6317]

Fucking analytical chemistry being a pain in the ass and the subject the keeps my GWA from getting high

[@averyzierden3205]

How do I make my calculator make it look like that

[@flawns]

isn't this just stoichiometry

[@Boristien405]

U WUT M8? - There are two methods to solve titration, one being stoichiometry (the first way) and the second is using the "shortcut" equation that he used at the end.

[@nischay4719]

Yep the concept behind titration is indeed stoichiometry.

[@yahyagh1020]

@@Boristien405 the third method is by using dimensional analysis

[@liulniguse3625]

WHAT ABOUt the SIGNIFICANT number

[@Peter_1986]

The answer is expressed to 3 significant figures (0.0422), which was the number of figures for each of the values in the beginning of the problem. Note that zeros in the beginning of a value don't count as significant figures, whereas decimal zeros do count.

[@khalifaalkhalifa1709]

Just become my teacher.

[@alpha_asibor]

Who's thinking?

[@_moonlightie_tita_3796]

Can't we just use MV1 = MV2 ?! The result then is 0.0210 , where's the problem ?!

[@AcerLab]

Why couldn't you be my teacher...

[@marsh6714]

his voice reminds me of cecil palmer from welcome to nightvale hahaa

[@hdusiusjsjwiiwisi]

omg thats so accurate

[@lanamotaz8903]

im failing in chemistry

[@flashx626]

The shortcut formula you used was incorrect because of which results you got were also incorrect. The correct formula is M1V1/n1=M2V2/n2 Using this formula we will get exactly same answer.

[@omaryproductionz1610]

does the n stand for the general molar mass of the compound?

[@nickolasspagnolo7304]

​@@omaryproductionz1610 it stands for the number of moles. when balancing the equation. properly needed that 7 months ago

[@rajkumarmane7436]

hey !!!! he didnt converted the mv volume into litrs!!!!! thats goin wrong!!!

[@infernape716]

+Rajkumar Mane That's not required. As long as the units on both sides if the equation are the *same*, it is correct.

[@rajkumarmane7436]

+infernape716 oh i got it !! thanks bro! by the way ,,whats ur name?? is it infernape716??

[@christianakalumbu9922]

can hardly c a thing

[@jonathanto99]

The guy has an arrogant and annoying voice, but otherwise a great video with great explanation.

[@loscolchoneros]

That was fake

[@farlean8607]

i don't get this at all. i hate science so much like actually man i dont understand shit at all and im fucking stressing out fuck

[@goldenstripes3296]

jrxo I kind of get it but it’s 10 mins before my test and I won’t remember any of it even if I do understand it

[@stevensullivan7917]

very annoying the way the way you put the calculator over what you have written