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

5 жыл бұрын

It's ok😄

@caribaez5711

5 жыл бұрын

Thank you for letting us know.

@calebkaufman7852

4 жыл бұрын

PROFESOR DAVE GROHL

@Hockeyjody

4 жыл бұрын

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

@filosofo-sz5ks

4 жыл бұрын

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

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

@BRuvSt0AsT

2 ай бұрын

yes

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

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

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

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

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

you have helped me big time ..i appreciate

your channel gonna be the best😍❤️

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

Is proportional dilution same as stock dilution ?

thank you profesor Dave 👑

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

3 жыл бұрын

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

thank you professor dave 👑👑

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

I got the answers right. Thanks professor

You go Dave!

Thanks prof. Great

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

Great videos! Just a quick question. For the sample problem, when I calculate the molar mass of Ca(OH)2 I get 92.1 not 74.1. What am I doing wrong? Thanks!

@ProfessorDaveExplains

5 жыл бұрын

i'm not sure! it's just Ca + 2O + 2H

@sillverice1212

Жыл бұрын

you can just google the molar mass as well. im not sure what you are doing wrong but The molar mass of calcium hydroxide, Ca(OH)2 , is 74.092 g/mol rounded up to 74.1. You take the molar mass of CA and then oxygen and hydrogen. Since there is a 2 around (OH) you need to double both oxygen and hydrogen so its 40.078+ 16+16 + 1.008 +1.008 totaling around 74.1

has anyone pointed out that molarity is moles of solute per liter of SOLUTION? just wondering

Where did the 74.1g come from?

Thanx prof. Dave

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

@gabriels2395

4 жыл бұрын

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

4 жыл бұрын

@@gabriels2395 thank you

Thankyou professor dave

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

@ProfessorDaveExplains

7 жыл бұрын

adobe after effects!

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

5 жыл бұрын

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

@tb2748

5 жыл бұрын

@@ProfessorDaveExplains Super fast reply, thanks!

The most underrated teacher ever

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

6 жыл бұрын

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

6 жыл бұрын

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

@1NikkiPink1

6 жыл бұрын

I confused mass and volume. Sorry.

@ProfessorDaveExplains

6 жыл бұрын

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

6 жыл бұрын

Excellent! Thank you so much again!

Love the Elevator music

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

@ProfessorDaveExplains

5 жыл бұрын

molar mass of calcium hydroxide

@ITSLIZZ111

3 жыл бұрын

from the periodic table

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

@ProfessorDaveExplains

5 жыл бұрын

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

@nataliecorrea5417

5 жыл бұрын

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

Thanks..

thank you professor dave👑

@Zak-qp5ln

3 жыл бұрын

thank you professor dave 👑👑

@tempestlll9638

3 жыл бұрын

thank you Professor Dave👑

@hadiharhous4287

3 жыл бұрын

Thankyou professor Dave

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

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

@ProfessorDaveExplains

5 жыл бұрын

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

Good

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

7 жыл бұрын

there's an annotation in place that makes the correction

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

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

6 ай бұрын

limewater?

thx！：）

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

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

6 жыл бұрын

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

@kripashankarshukla4073

6 жыл бұрын

Yes sir, sure

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

I just learned 2 months worth of chemistry in 2 minutes

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

@ProfessorDaveExplains

5 жыл бұрын

What is the question?

@elitehumpty3603

2 жыл бұрын

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

Chemistry looks pretty cool

@trapjawguch3247

5 жыл бұрын

It’s extremely hard though

@caribaez5711

5 жыл бұрын

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.

chest hair for the win😂

thank you chemistry Jesus

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

🙏🙏🙏

love to the chemistry lord Jesus!

have someone ever told u u look like Jesus

@ProfessorDaveExplains

7 жыл бұрын

many times, my friend.

@tonyzhao409

7 жыл бұрын

Professor Dave Explains hahaha and also u didnt teach me shit

@tonyzhao409

7 жыл бұрын

Professor Dave Explains jkjk i luv u .

@raffih5236

6 жыл бұрын

yeah

@ariannakraljic6237

4 жыл бұрын

I thought he looked like Lord Farquaad

Tootorials lol

Peace out ✌️

Look at that chest hair!

Bro looks like AI generated

Do u alone make these videos??

@ProfessorDaveExplains

6 жыл бұрын

yeah!

The 41 dislikes are of fools

can i have ur autograph