What's the Difference Between Molarity and Molality?
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- เผยแพร่เมื่อ 15 ก.ย. 2024
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What's the difference between molarity and molality? They are both measures of concentration, but molarity has to do with volume (in Liters) and molality has to do with mass (in kilograms). Also, molarity talks about the volume of the total solution (solute and solution combined), and molality is about mass of the solute and solvent separately.
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Normality?
Can you please do a video on normality
Mole Fraction
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You always explain concepts so well and detailed that I feel my students will have an excellent foundation for their future chemistry classes .
Clearest definition of Molarity and Molality I've found! The visuals help so much
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Yes, you're absolutely right. But usually that difference is so small that it doesn't matter, even in solvents of different densities. The one situation where it does really start to matter is in solutions that have a very high concentration of solute, so if you're dissolving a whole ton of something into a solvent, then that can really start to add up.
3:48 - 3:49 That's what I was thinking in chemistry class, and that is why I have to watch this video.
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But which is greater...Molaltiy or Molarity?
Molality does not change with temperature but molarity does
Shouldn't it depend on the density of solution and solvent?
@@srirampatnaik9164 no it depends on volume
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Your a wonderful instructor, professors should watch your videos and learn from you so they can teach better. Thanks for
breaking it down and making it simply =)
but then what's morality !???
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The amount of unnecessary prejudices and superstitions one has acquired [on top of obvious basic decency ]
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one more thing, the reason some chemical equation preferred molal over molarity is that molality wont be effected by the temperature. the heat that is generated towards the solution will make it's molecules expanding therefore the volume increased, but the mass remains the same
Thank you so much for explaining the significance and differences between molality and molarity. Very often do instructors tell you to simply "plug the numbers into the formula". However, it is so much better to have access to a more thorough explanation.
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You explain this so well, but what’s also nice is your voice is clear and easy to follow. For English speaking people, that is.😁
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can you please make a video about Normality?
I asked him the same in other video :D so 2 votes !
Yes yes an English video about normality pleeeeeese!
being normal is incredibly overrated tho.
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OMG, Seriously THANK YOU!!!! I kept telling everyone that wouldn't the total amount of solute and solvent change btwn Molarity and Molality... everyone kept looking at me cross-eyed, that is until I found your video!!! THANK YOU
Please make a video on Normality, Equivalent Weight and n factor. Thank you for the interesting videos that you make.
even ur eleven year old vid is better than my teacher explaining 3hrs for this simple topic in this era of digital board and facility (i wish ur were born in india )
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Crystal clear explanation... Go for it guys if u wanna clear your concepts
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Thank you so much for replying I understand you may be very busy but these are just a few requests if it were possible for you to do a couple or even one
- solutions; suspensions; colloids
- saturated, unsaturated and supersaturated solutions
- Henry's law
- Enthalpies of solution
This is where we have studied up to and I know that there are many videos out there on these topics but i fail to understand them or my school teacher as much as i understand you! Thanks again for taking time to reply
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Damn you scientists for SUCKING at naming things.
My turn:
Moles Solute / Liters of Solution = MoLiSol. MolaLi. MolaLity. MolSolurity
Moles Solute / Kilograms of Solvent = MolGraSol. MolaKi. MoGrarity. MolSolvency.
My names have CLEAR OBVIOUS differences to avoid any confusion, and are related to what they mean.
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Really good and very helpful .. I was able to clear my doubts
When people say a solution is less or more concentrated, they actually mean that the moles(atoms/molecules) of the solute are less or more crowded together in a solution? Shouldn't that say that the concentration is actually the concentration of a solute (in a solution )? I think about certain details so I'm sorry if it sounds weird.
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Please make a video about Normality and Formality
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So if I'm interpreting this right, there should also be another very slight (in this example at least) difference, but still important. In a 1M sol'n there is 1L of CaCl2 + Water, which would weight out to basically 1kg. However in the Molality it will actually be 1.111kg, which is 1kg of Water + 111.0g of CaCl2. Is this correct?? This would no doubt become a more significant difference also in different density solvents.
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I'm sorry I forgot to say this, so the correct term would be the molar or molal concentration of the solute (in a solution), right? And one more thing, so we just assume the entire amount of solute is dissolved, right? Like there isn't any part of it that is not dissolved, since the definition of concentration is the amount of solute dissolved in a solution. I hope you can answer my questions, thank you.
so is Molality ALWAYS greater than molarity in aqueous solutions, or are there factors such as density that will change that ?
I have a funny question, is it molar and molal concentration of solute or solution? You mention a molar of solution but isn't it molar concentration of solute in a solution (or simply molar concentration of solute)? I know it's just the naming but it still confuses me a bit, I would say molar concentration of solute in a solution and molal concentration of solute per solvent?
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HI! I know I'm late and this vid was 6 years ago but I do hope you can make a video about Molality Sample Exercises. Thank you :)
He has already made a molality practice problem video. I hope it isn't too late to be of use to you ☺☺☺.
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I am confused that temperature doesn't affect molality because mass remains unaffected . How?will you please explain sir?
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Do you also need to add solute to the 3rd flask then a solvent again until it reaches 1 liter or just add solvent up to 1liter???
can you please make a video for solubility??
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There are just three more concepts that I would like for him to touch on. Thats is this: Normality, osmolarity, and osmolality
Thank u so much . Hope my teachers c this and learn from u
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Thanx Tyler for helping me in my review of my science/chemistry test
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how should i calculate the molarity of a solution of ethanol in water in which mole fraction of ethanol is 0.040.(assume the density of water to be one)
What is normality then ?
Being normal.
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so, what´s more conentrated 1 molar, 1 molal or 1 normal and why?
Excellent explanation. Keep it up!
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i understand . u made it simple
Lol i just realized that whenever im making a juice drink using powdered juice, im using the molarity side rather than the molality😂