What's the Difference Between Molarity and Molality?

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  • Опубліковано 28 вер 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.

КОМЕНТАРІ • 257

  • @lindsaywright3665
    @lindsaywright3665 11 років тому +443

    i think my teacher needs to watch this video

  • @tdewitt451
    @tdewitt451  11 років тому +2

    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.

  • @myriamkass4345
    @myriamkass4345 4 роки тому +7

    Tyler,
    I want to thank you in name of all my students for your great videos. Our school, like most high schools, had to go to distance learning during this corona virus pandemic. While preparing my lessons I was so happy I could depend on your videos for excellent instruction.
    You always explain concepts so well and detailed that I feel my students will have an excellent foundation for their future chemistry classes .

  • @AVTR15
    @AVTR15 Рік тому +3

    Clearest definition of Molarity and Molality I've found! The visuals help so much

  • @tdewitt451
    @tdewitt451  12 років тому +4

    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.

  • @audreyandremington5265
    @audreyandremington5265 5 років тому +17

    3:48 - 3:49 That's what I was thinking in chemistry class, and that is why I have to watch this video.

  • @novaop7776
    @novaop7776 6 років тому +3

    Been subscribed to you for so long now, I've stopped since my A-levels but I'm preparing for a prelim test and I'm recapping. Thank you so much for the videos you've posted. You've got a knack for teaching!

  • @jessicazwilling7456
    @jessicazwilling7456 7 років тому +2

    You are my Chem savior! My college professor's explanation was not even close to yours. You should host lectures where you teach professors HOW to teach these topics.

  • @bhaibhabhi8569
    @bhaibhabhi8569 8 років тому +1

    your lectures are conceptual & easy to understand.

  • @GB-yq6nr
    @GB-yq6nr 7 років тому +2

    your videos helped me so much to understand chemistry

  • @praktanpulekar9198
    @praktanpulekar9198 4 роки тому

    from 2020 and still love this video

  • @blacklight4977
    @blacklight4977 7 років тому +2

    Please make a video about Normality and Formality

  • @mashroom2927
    @mashroom2927 2 роки тому +1

    That was so easy and understandable tysm 🍮

  • @vasantgphadke
    @vasantgphadke 11 років тому

    Only good teacher can teach like this

  • @taibahaldakhil4684
    @taibahaldakhil4684 8 років тому +1

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  • @voldermortriddle6767
    @voldermortriddle6767 6 років тому

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  • @madhdamm2888
    @madhdamm2888 4 роки тому

    our a wonderful instructor, professors should watch your videos and learn from you so they can teach better. Thanks for your wonderful videos....But why you didn't come up with videos recently. We like to see you soon on UA-cam....Thanks a lot Sir...

  • @ABeardedDad
    @ABeardedDad 12 років тому

    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.

  • @ryanmarchese2250
    @ryanmarchese2250 5 років тому

    This man is so much better than my teacher, who is being paid a salary. This guy works off of add revenue

  • @cutesunnyaegyo
    @cutesunnyaegyo 7 років тому +4

    NOW I GET IT THANK GOODNESS

  • @ery1502
    @ery1502 11 років тому

    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.

  • @DB-pw9md
    @DB-pw9md 8 місяців тому +1

    God bless you sir.

  • @nafchillytube4674
    @nafchillytube4674 5 років тому

    Boss/Sir/ you own my heart and I can't seem to understand how to thank you. You exactly explained how I wanted to ❤️

  • @TehhStarzHD
    @TehhStarzHD 10 років тому

    so is Molality ALWAYS greater than molarity in aqueous solutions, or are there factors such as density that will change that ?

  • @Heyitsadam21
    @Heyitsadam21 4 роки тому

    Wow this is so clear to me now, thank you!

  • @aradhanachhabra
    @aradhanachhabra 6 років тому +2

    You are THE BEST .

  • @naman_ind
    @naman_ind 5 років тому +1

    I am loving it learning

  • @krishnamandalika552
    @krishnamandalika552 9 років тому

    Create for organic chemistry also sir

  • @SavitaSingh-fp5zj
    @SavitaSingh-fp5zj 6 років тому

    Plzz upload Normality and Formality

  • @jullyray7645
    @jullyray7645 4 роки тому

    I'll definitely want my teacher to see your videos. This is how science is taught. Not like how my teacher does. 😋

  • @tracer3059
    @tracer3059 7 років тому

    but can you make a video on solution and suspension

  • @islamispeace2208
    @islamispeace2208 5 років тому

    Thank you so Much sir you're awesome........ Love from India

  • @lamyasms4656
    @lamyasms4656 7 років тому +12

    that one hot chemistry teacher

    • @spicasusl3
      @spicasusl3 4 роки тому

      bruh

    • @stormehh19
      @stormehh19 3 роки тому

      That student who is only here for the bod. I mean seriously?

  • @chloestarchman5768
    @chloestarchman5768 8 років тому

    Do you think you could make a video on molality practice problems?

  • @bryarrashid7015
    @bryarrashid7015 2 роки тому +1

    Keep going

  • @loganr0740
    @loganr0740 6 років тому

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  • @norhanhagag4250
    @norhanhagag4250 3 роки тому

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    @Neelamsharma-gx4og 4 роки тому

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  • @minakshichaudhary6118
    @minakshichaudhary6118 6 років тому

    Sir in ur country which class study this chapter if u dont min can u answer me

  • @cxllmegeo3557
    @cxllmegeo3557 2 роки тому

    So molarity is basically volume and molality is weight
    Also at 2:11 shouldn’t the moles be in grams or am I buggin???

  • @sashikala9060
    @sashikala9060 5 років тому

    wow....amazing...thk u..

  • @justinhansen7384
    @justinhansen7384 6 років тому

    Thank you for your video.

  • @sirdouchebag1802
    @sirdouchebag1802 9 років тому

    thanks bro! helped me alot..

  • @kunukandayashodha2166
    @kunukandayashodha2166 6 років тому

    thank you so much

  • @stimulantdaimamld2099
    @stimulantdaimamld2099 Рік тому +1

    great

  • @siddharthdahiya229
    @siddharthdahiya229 8 років тому +5

    cant you give more vidios on topics like #NORMALITY...
    and the chapter #CHEMICALBONDING

  • @aisynane569
    @aisynane569 6 років тому

    thank you sir!

  • @RajeshKumar-me1xd
    @RajeshKumar-me1xd 9 років тому

    videos on quantum number ..

  • @brownie6430
    @brownie6430 2 роки тому +1

    Thanks Babes

  • @Bitternov
    @Bitternov 4 роки тому

    THE BEST!! !!

  • @Maria-sf8yg
    @Maria-sf8yg 3 роки тому

    well that is truuue for water BUT it's not true for MANY OTHER solvants

  • @lylyanazarela4807
    @lylyanazarela4807 10 років тому

    i wish u can be my teacher

  • @nadhiyainnu4030
    @nadhiyainnu4030 2 роки тому +2

    9 years ago 🤓

  • @Stayceltic
    @Stayceltic 6 років тому

    You
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  • @erinkim169
    @erinkim169 7 років тому

    does no one else notice concentration is spelled "conceutration"??

  • @AHMADAli-sb7ex
    @AHMADAli-sb7ex 7 років тому +2

    Only m here who thinks that He looks more like "Justin beiber"😄😂😍😜😎

  • @azobread7111
    @azobread7111 4 роки тому

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  • @SV42165
    @SV42165 3 роки тому +1

    oR ……MoRaLiTY.

  • @joshuajackson9179
    @joshuajackson9179 7 років тому

    All Hail Are Lord And Savior, Tyler DeWitt!

  • @vedanthumbe4649
    @vedanthumbe4649 3 роки тому +1

    how many IIT-
    JEE aspirants here

  • @raghuvansh1293
    @raghuvansh1293 5 років тому

    Hamara alakh pandey hi theek hai yaar

  • @ranukhan8168
    @ranukhan8168 3 місяці тому

    😂 11 years ago 😅

  • @billiardlefranc4809
    @billiardlefranc4809 5 років тому

    WTH hits the thumbs down button?

  • @jaineeshah9346
    @jaineeshah9346 5 років тому

    haha i thought my teacher made a typo on his worksheet when it said "molality"...
    oops :)

  • @tdewitt451
    @tdewitt451  12 років тому +76

    thanks so much for your kind comment! i'm very busy and can't promise that i'll make videos on certain topics, but i always consider requests when i'm deciding what topics to address. so please let me know what might be helpful for you to see.

  • @runetude4406
    @runetude4406 9 років тому +224

    but then what's morality !???

    • @greengleek43v3r
      @greengleek43v3r 9 років тому +44

      runetude i don't know why but this comment gives me life

    • @gnuPirate
      @gnuPirate 8 років тому +37

      :
      The amount of unnecessary prejudices and superstitions one has acquired [on top of obvious basic decency ]
      / per unit of brain matter
      ...[ ? ] possibly.
      This ratio is expressed in arrogance and measured in dB.

    • @nabeelm358
      @nabeelm358 7 років тому +1

      LOL!!

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      @jiedengyuewo7169 6 років тому

      hahahaha!!

    • @jiedengyuewo7169
      @jiedengyuewo7169 6 років тому

      Beautiful!! xD xD

  • @amun6416
    @amun6416 10 років тому +21

    I FUCKING LOVE THIS GUY

  • @aklilue1941
    @aklilue1941 8 років тому +138

    Hey Tyler, I created an account just to tell you this. I have been reading about mole (your other video) and molarity and molality for more than 20 years (I am a physician). I never had it explained this easy. You are awesome!!

    • @cloutgangster
      @cloutgangster 5 років тому +1

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      @xyle5135 4 роки тому +1

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      @tragedy2722 3 роки тому +1

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  • @theultimatereductionist7592
    @theultimatereductionist7592 5 років тому +18

    UA-cam: NEVER TAKE DOWN THIS VERY CLEAR & IMPORTANT VIDEO!

  • @kanchisoni36
    @kanchisoni36 9 років тому +23

    This guy....is saving my life...this and the gas laws and all that...helping me for passing the exams...Thanks a lot! :)
    But which is greater...Molaltiy or Molarity?

    • @niggamog_69
      @niggamog_69 6 років тому +2

      Molality does not change with temperature but molarity does

    • @srirampatnaik9164
      @srirampatnaik9164 3 роки тому

      Shouldn't it depend on the density of solution and solvent?

    • @WhenCatPlayz
      @WhenCatPlayz 5 місяців тому

      @@srirampatnaik9164 no it depends on volume

  • @vsanabria2
    @vsanabria2 10 років тому +17

    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 =)

  • @joshbullis2322
    @joshbullis2322 7 років тому +14

    Tyler, you are the best Chemistry teacher! I'm doing well in my Chemistry class thanks to your videos.

  • @ngm6541
    @ngm6541 9 років тому +45

    can you please make a video about Normality?

    • @shayanyadegari811
      @shayanyadegari811 5 років тому +2

      I asked him the same in other video :D so 2 votes !

    • @ayame316
      @ayame316 5 років тому +1

      Yes yes an English video about normality pleeeeeese!

    • @spicasusl3
      @spicasusl3 4 роки тому

      being normal is incredibly overrated tho.

  • @anwarsadath9177
    @anwarsadath9177 4 роки тому +4

    I dunno how he can be so incredibly a great teacher

  • @jasonwu4434
    @jasonwu4434 9 років тому +5

    Exceptional explanation. It made things very clear.

  • @kurosaito3141
    @kurosaito3141 6 років тому +3

    Thanx Tyler for helping me in my review of my science/chemistry test
    (#PRAYFORMEGUYS XD)

  • @ammarfallatah2995
    @ammarfallatah2995 8 років тому +3

    يا شيخخخ احوب خااالتك 😘😘😘💖

  • @hermitcard4494
    @hermitcard4494 3 роки тому +2

    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.

  • @tanyachanchalani5662
    @tanyachanchalani5662 6 років тому +4

    What is normality then ?

  • @elangz9201
    @elangz9201 7 років тому +1

    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

  • @Oldmanflyfishing
    @Oldmanflyfishing 3 роки тому +2

    Tyler, thank you so much for your channel. I am a mature student that is trying to upgrade his high school credits online, through community college. If it wasn't for you doing this channel, I would NEVER have been successful, I owe you a great deal of thanks.

  • @carlisefarren4236
    @carlisefarren4236 Рік тому +1

    Excellent!, Chef Kiss🤌. Thank you

  • @happypotato4335
    @happypotato4335 Рік тому +1

    goddamn ur a lifesaver

  • @AjitSingh-tg7tw
    @AjitSingh-tg7tw 6 років тому +3

    How could all these 23 people dislike it

  • @rauandabdullah8253
    @rauandabdullah8253 12 років тому +1

    Hi, i just wanted to say that i seriously love your videos and i was worried that you had stopped making them because i hadn't seen any videos pop up in my homepage for ages! I am in a vital year at school this year and you made this video just in time! please reply to my message so i know you have actually read it because i have a few requests if it were possible for you to do.

  • @anupamasingh9738
    @anupamasingh9738 Рік тому +1

    Best until today 🤗

  • @ruyasatpathy1237
    @ruyasatpathy1237 2 роки тому +1

    You saved my life

  • @zainalilaghari4191
    @zainalilaghari4191 7 років тому +1

    Sir you are the best teacher.👍

  • @mohamedamrelsenne394
    @mohamedamrelsenne394 6 років тому +2

    can you please make a video for solubility??

  • @preetiarora3428
    @preetiarora3428 6 років тому +2

    Please make a video on Normality, Equivalent Weight and n factor. Thank you for the interesting videos that you make.

  • @gurple9319
    @gurple9319 7 років тому +1

    Lol i just realized that whenever im making a juice drink using powdered juice, im using the molarity side rather than the molality😂

  • @owner099
    @owner099 8 місяців тому +1

    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 )

  • @wilhelminafikeipo1963
    @wilhelminafikeipo1963 9 років тому +1

    Tyler is a professor

  • @रोहित1
    @रोहित1 2 роки тому +1

    Thank you 🥺❤

  • @nidafatima5589
    @nidafatima5589 2 роки тому +1

    Your video helped me so much
    you're really good instructor and professor 👍🏻

  • @fed_eric
    @fed_eric 7 місяців тому +1

    Been encountering this lesson in junior high, in senior high. I'm now in college and here i am again lol

    • @painlxrd4256
      @painlxrd4256 6 місяців тому

      same, got my uni entrance exam tomorrow 😹 learned this in 10th grade

  • @8055aib
    @8055aib Рік тому +1

    So helpful

  • @LakmalSajith
    @LakmalSajith 4 роки тому +1

    I really love the way you teach!!❤❤❤

  • @michaelabah1037
    @michaelabah1037 2 роки тому +1

    Thank you

  • @chrisaccou3174
    @chrisaccou3174 8 років тому +2

    This man right here is the truth