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.
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.
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+
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.
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?🌼
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.
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?
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?
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.
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.
+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.
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.
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.
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?
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.
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)?...
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.
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.
@Far Deen But we are measuring molality and molarity at THAT PARTICULAR INSTANT of when its 4 degree Celsius & when its 98 degree Celsius
excellent explanation sir...you have turned out to be my home tutor ...thanks a lot !!!
yes..... best teacher in the world,
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.
Tyler DeWitt
Sir please send the link
Molality will not affect by evaporation of solvent (mass will decrease)by increasing the temperature?
Hands down the best teacher on UA-cam!!
IF IT WEREN'T FOR YOU.. I WOULD'VE FAILED CHEMISTRY!!!! LITERALLY. YOUR VIDEOS ARE A LIFE SAVERRRRRRRRRRRRR!
you are explaining it much easier than any of my teachers, thank god that you exist:)
Even a baby can learn chemie with you.Thanks!
xxtravisxxify no a baby can't... wht if he/she doesn't even understand English
xxtravisxxify eh I wish I could have been this baby lol
@@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 !!!!
Literally a human genius; we appreciate you so much and you will never know how much you mean to us!!
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+
These videos are great at explaining sciencetific concepts glad you keep posting them!
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.
Man I learnt more in your videos than in my whole year at school.
Excellent video! I'm a visual learner and this was great.
thank you sir, you're a good teacher, i salute you!
such a fabulous teacher. This is my first time viewing your videos and I will definitely be returning.
Best teacher in the entire universe. Regards from Egypt the cradle of Science
another advantage of molality is that it's used for in finding the change of boiling point and freezing point.
No textbook can even come close to what you're explaining ability is. Thank you.
My best chemistry teacher ❤️ .
bless you, sir!!! You're the best youtube teacher so far :)
Nice
Tyler I feel like I owe you a hug. Thanks so much.
Can you do Molality problems?
You make learning sooo much easier and fun. I enjoyed this video. Thankkkkk you
OMG! You’ve explained it so well. Thank you.
You're way better than my professor at the university. She's way too cranky when she teaches Chemistry
Great Great Great. This guy is an asset to the world. LOVE YOU
Your teaching is really amazing!!!!
i love ur vidios ur teaching style is awsome.. U r the best teacher in the world ...
I even made a UA-cam channel that's inspired by you sir! Thank you for being my inspiration. Hats off to you Sir
Best. Teacher. Ever.
very nice explanation, thank you so much
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?🌼
sir thank you for this excellent video and can you plz make a video on problem solving of molality related question ,please.
Excellent Job. Best wishes. Thank you so much
You look a lot like anakin skywalker if he mastered chemistry
Your videos have helped me so much, thanks !
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.
Great explanation!
Tyler, you are just awesome ❤️
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
your videos have saved me many many times...you are an amazing educator....now to find a Tyler Dewitt of physics. :)
Man you are good .. thanks for clearing that up .. keep up the good videos!
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?
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?
I really now could not understand anything from anyone else except you. God bless you. Please visit Pakistan,
That was beautifully done. Thank you.
This is such a huge help thank you!
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.
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.
+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.
Can you please do a video that will show us how we do Molality problems?
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.
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.
thank you so much i now actually understand why we have to use molality!!! :)
Great job!
I am big fan for ur teacher
thank you so much for this video rellay now I know more thing a bout moliraty and moliality
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?
Excellent.
Super Helpful
thanks Tyler!
did you just call a teacher by his name?! O_o
Why doesn't "1kg water" change at different temperatures or pressure like in molarity example?
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.
Plz tell about the temprature dependency of molality and molarity
nice explanation and attractive
You re the best... thanks
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)?...
thank you so much
sir I have one question, in qualitative analysis can be use Na2 s at the place of Hydrogen sulphide,
I have one doubt mr. Actually how to prepare 3gram of samples like a organic or inorganic products
Thank you sir this helps me alot😉💙
Tres intéressant!
Good
Thanks!
But doesn't water expand when it freezes?
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.
Ah okay, thanks!
+Tyler DeWitt I did not know that! That's so cool hahah get it cool
+Tyler DeWitt I did not know that! That's so cool hahah get it cool
@@tdewitt451 yeah
Thank you sir love ❤ from india
When the question problem involves change of temperature I need to use morality instead of molarity?
Sir is there any video about common ion effect??
Thank you so much!
Will you make video on normality
Please
GENIUS🤩
SUPERRR THANK YOUUUU❤❤❤❤❤
so then why use molarity
شرحك روعة 👏👏😍💜💜
sir. how about when it has density given in the problem?
Rex Rivera density= mass/volume. if you have density and mass OR volume, you can find the third quantity
I wish I can give you my tuition.
thanks
awesome
i think this exam i might pass
you should also try teaching maths
Nice
Dude you are epic
I dunno why but he looks a lot like Theo James for me
you are awesome!
Thanks a lot
v nice
So the real question is why use molarity?!!!
should've just not let molarity exist man ._.
i love guys in pink:)
Be looking like a ken in pink.