good question. yes you're absolutely right that water expands when it's frozen solid (to make ice), but before this phase change happens and the water is still liquid, cold water contracts and hot liquid water expands.

@codegenesis80085

3 жыл бұрын

@Far Deen But we are measuring molality and molarity at THAT PARTICULAR INSTANT of when its 4 degree Celsius & when its 98 degree Celsius

Hey everyone, I'm here to help. If you have any questions or just want to learn more, click on the link in the description above. It'll take you to a page where you can ask me questions.

@chemistryontipsbyvinitadex7467

6 жыл бұрын

Tyler DeWitt Sir please send the link

@knowledgepoint5052

5 жыл бұрын

Molality will not affect by evaporation of solvent (mass will decrease)by increasing the temperature?

yes..... best teacher in the world,

excellent explanation sir...you have turned out to be my home tutor ...thanks a lot !!!

Even a baby can learn chemie with you.Thanks!

@chhavigupta2802

7 жыл бұрын

xxtravisxxify no a baby can't... wht if he/she doesn't even understand English

@CariBaez

7 жыл бұрын

xxtravisxxify eh I wish I could have been this baby lol

@metrominechemicals3740

4 жыл бұрын

@@chhavigupta2802 hahaha😂😂😂

hey Tyler just wanted to say thumbs up man, started with my engineering degree which has a lots of science and maths and your videos are helping with get through the heavy load of work ........... YOU ARE AMAZING !!!!

Love it man. You are seriously the next Bill Nye the Science Guy. Your videos are like that Khan guy, only better. You're more interesting, there's no weird black background and you've got sweet prepared flash cards. It's always a pleasure to see you bust out a new flashcard! Seriously, I really appreciate how well thought out your videos are, easy to follow, and visually clear and compelling. A+

IF IT WEREN'T FOR YOU.. I WOULD'VE FAILED CHEMISTRY!!!! LITERALLY. YOUR VIDEOS ARE A LIFE SAVERRRRRRRRRRRRR!

These videos are great at explaining sciencetific concepts glad you keep posting them!

Hands down the best teacher on KZread!!

you are explaining it much easier than any of my teachers, thank god that you exist:)

Literally a human genius; we appreciate you so much and you will never know how much you mean to us!!

another advantage of molality is that it's used for in finding the change of boiling point and freezing point.

such a fabulous teacher. This is my first time viewing your videos and I will definitely be returning.

thank you sir, you're a good teacher, i salute you!

Can you do Molality problems?

You make learning sooo much easier and fun. I enjoyed this video. Thankkkkk you

Your videos have helped me so much, thanks !

Sir, I was perplexed about the molality but today you made it simpler. Thanks for your explanation. Please support students like us with your explanation.

bless you, sir!!! You're the best youtube teacher so far :)

@ghanshyamgupta4047

2 жыл бұрын

Nice

Brilliant! Your lessons are amazing!

Sir your videos are extremely helpful to me.you created me interest in chemistry.please upload videos in organic chemistry also

Excellent video! I'm a visual learner and this was great.

Great topic and presentation! I would like to ask if you could please cover, the conversion between these two concentration concepts, so we may derive concentration for use in quantifying analytes in samples that differ in density to water.

Excellent Job. Best wishes. Thank you so much

Man I learnt more in your videos than in my whole year at school.

i love ur vidios ur teaching style is awsome.. U r the best teacher in the world ...

Your teaching is really amazing!!!!

OMG! You’ve explained it so well. Thank you.

Great explanation!

That was beautifully done. Thank you.

sir thank you for this excellent video and can you plz make a video on problem solving of molality related question ,please.

Man you are good .. thanks for clearing that up .. keep up the good videos!

Can you please do a video that will show us how we do Molality problems?

No textbook can even come close to what you're explaining ability is. Thank you.

This is such a huge help thank you!

I even made a KZread channel that's inspired by you sir! Thank you for being my inspiration. Hats off to you Sir

Tyler I feel like I owe you a hug. Thanks so much.

Your awesome. Do you know how my teacher taught. She just gave me the formulas saying as definition and didn't explained. She always forces me to come to Your channel.

very nice explanation, thank you so much

Best teacher in the entire universe. Regards from Egypt the cradle of Science

You're way better than my professor at the university. She's way too cranky when she teaches Chemistry

My best chemistry teacher ❤️ .

Tyler, you are just awesome ❤️

Great videos! Thanks! As you point out, Molarity is tempurature (and pressure?) dependant where as Molality is not. Frequently, it IS easier to weight out the mass of solvent and get Molality -- but the referenceing calculations or literature might reference Molarity. If I know the tempurature AND eqn of state for my solvent, I can grind through the algebra and convert to Molarity. Could you demonstrate any simple techniques for converting back and forth between Molality/Molarity?

Great job!

hi, your videos helped me a lot with my assignments and reviewers.. can you replace our teacher? LOL can you make a video about Dilution problems? and parts per million (ppm)?...

Great Great Great. This guy is an asset to the world. LOVE YOU

Best. Teacher. Ever.

thank you so much for this video rellay now I know more thing a bout moliraty and moliality

your videos have saved me many many times...you are an amazing educator....now to find a Tyler Dewitt of physics. :)

I really now could not understand anything from anyone else except you. God bless you. Please visit Pakistan,

If the temperature continues to rise and some of the water is evaporated, would that not alter the weight? Or is there a point that should be considered before it starts evaporating?

Thank you so much!

Thank you sir this helps me alot😉💙

nice explanation and attractive

We are considering a closed system where water cannot evaporate right? Because that's what always bothers me, weight doesn't depend on temperature but if you loose water for evaporation you are loosing it. So nobody says that but in molarity vs molality we are always assuming no evaporation, right?

Super Helpful

Plz tell about the temprature dependency of molality and molarity

Excellent.

thank you so much i now actually understand why we have to use molality!!! :)

You re the best... thanks

sir I have one question, in qualitative analysis can be use Na2 s at the place of Hydrogen sulphide,

But if you increase or decrease the temperature, doesn't water evaporate making the kg of solvent decrease or increase ultimately changing the molality of the solution.

@tdewitt451

8 жыл бұрын

That's why bottles have tops. If you are careless and allow water to evaporate from a solution, there is no effective way to measure or explain the concentration.

@palanig6193

8 жыл бұрын

+Tyler DeWitt Hey come on have u stopped posting videos.That doesn't sound good.I am simply blank on equivalent weight and methods of determining the eq.mass,eq.mass of acid,base,salt.Plz its too urgent.I am having exams this saturday,Plz post the vidoes on this topic within 2,3 days.Plz,this is my humble request.

4°c means the temperature is too low (comparing with 98°c) that means it will be cold until freezes, when water freeze it will expand that means its volume will increase, BUT it will not contract Example liquid water and ice. Am I right or not please?🌼

thanks Tyler!

@sharonsam2674

3 жыл бұрын

did you just call a teacher by his name?! O_o

I have one doubt mr. Actually how to prepare 3gram of samples like a organic or inorganic products

Tres intéressant!

Sir is there any video about common ion effect??

thank you so much

GENIUS🤩

I am big fan for ur teacher

You look a lot like anakin skywalker if he mastered chemistry

I wish I can give you my tuition.

SUPERRR THANK YOUUUU❤❤❤❤❤

thanks

I don't understand this question can you help me.. calculate the molarity of k+ in a solution formed by mixing 0.020 L of 0.020 M solution of k2SO4 with 0.010 L of 0.020 M solution of k3PO4.

Good

Thank you sir love ❤ from india

Why doesn't "1kg water" change at different temperatures or pressure like in molarity example?

@tdewitt451

3 жыл бұрын

Because weight never changes. If a brick weighs 10 kg, it weighs 10 kg when it’s freezing, it weighs 10 kg when it’s boiling hot. It weighs 10 kg under height pressure at the bottom of the ocean, and it weighs 10 kg at the top of Mt. Everest, where pressure is low.

Thanks! But doesn't water expand when it freezes?

@tdewitt451

10 жыл бұрын

Good question. Yes you're absolutely right that water expands when it's frozen solid (to make ice), but before this phase change happens and the water is still liquid, cold water contracts and hot liquid water expands.

@ab-js8qs

10 жыл бұрын

Ah okay, thanks!

@kevinmartin6419

8 жыл бұрын

+Tyler DeWitt I did not know that! That's so cool hahah get it cool

@kevinmartin6419

8 жыл бұрын

+Tyler DeWitt I did not know that! That's so cool hahah get it cool

@ManojKumar-bd6eo

4 жыл бұрын

@@tdewitt451 yeah

Nice

Will you make video on normality

@alexsumiya530

3 жыл бұрын

Please

awesome i think this exam i might pass

When the question problem involves change of temperature I need to use morality instead of molarity?

sir. how about when it has density given in the problem?

@aryamgandhi2126

7 жыл бұрын

Rex Rivera density= mass/volume. if you have density and mass OR volume, you can find the third quantity

you should also try teaching maths

Dude you are epic

so then why use molarity

v nice

I dunno why but he looks a lot like Theo James for me

you are awesome!

Thanks a lot

i love guys in pink:)

So the real question is why use molarity?!!!

Be looking like a ken in pink.

should've just not let molarity exist man ._.