Molarity, molality, osmolarity, osmolality, and tonicity - what's the difference? | Khan Academy

Learn how to use three lab values (Sodium, glucose, and BUN) to approximate your plasma osmolarity. Rishi is a pediatric infectious disease physician and works at Khan Academy. Created by Rishi Desai.
Watch the next lesson: www.khanacademy.org/science/h...
Missed the previous lesson? www.khanacademy.org/science/h...
Health & Medicine on Khan Academy: No organ quite symbolizes love like the heart. One reason may be that your heart helps you live, by moving ~5 liters (1.3 gallons) of blood through almost 100,000 kilometers (62,000 miles) of blood vessels every single minute! It has to do this all day, everyday, without ever taking a vacation! Now that is true love. Learn about how the heart works, how blood flows through the heart, where the blood goes after it leaves the heart, and what your heart is doing when it makes the sound “Lub Dub.”
About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything.
For free. For everyone. Forever. #YouCanLearnAnything
Subscribe to Khan Academy’s Health & Medicine channel: / channel
Subscribe to Khan Academy: kzread.info_...

Пікірлер: 34

  • @mrAZcardinal
    @mrAZcardinal11 жыл бұрын

    Because without school you wouldn't realize that you needed to come to youtube to figure out what the heck your teacher was talking about.

  • @jasmine_ism
    @jasmine_ism10 ай бұрын

    I'm so glad I found this channel in my first year of med school!

  • @HackerTHATSME
    @HackerTHATSME11 жыл бұрын

    maaaan I love khanacademy, why do I still have to go through my obsolete schooling system when I can do this?

  • @curtpiazza1688
    @curtpiazza16882 жыл бұрын

    Wow....you make it soooo easy!

  • @josiemarshall3509
    @josiemarshall35098 жыл бұрын

    very nicely put

  • @tomymoh6788
    @tomymoh67885 жыл бұрын

    Excellent

  • @FatimaKhazaal534
    @FatimaKhazaal5342 жыл бұрын

    Thanks alot for your effort

  • @a6039043
    @a603904310 жыл бұрын

    Just copied this from a website. I checked a few and they all say the same thing: Osmolality is a measure of the moles (or osmoles) of solute per kilogram of solvent expressed as (mol/kg, molal, or m). Since the amount of solvent will remain constant regardless of changes in temperature and pressure, osmolality is easier to evaluate and is more commonly used, and often preferred, in practical osmometry. Most commercially available osmometers report results using osmolality units mOsm/kg.

  • @erzas556
    @erzas5568 ай бұрын

    Thank you so much

  • @jesusmrosario-claudio4104
    @jesusmrosario-claudio41043 жыл бұрын

    Thank you

  • @kamrulhasan-yp8vf
    @kamrulhasan-yp8vf6 жыл бұрын

    ভালো লাগলো ...

  • @TheJoshtheboss
    @TheJoshtheboss4 жыл бұрын

    What's the difference between concentration (mg/mL)and osmolarity (Mosmo/L)?

  • @parvtay565
    @parvtay5657 жыл бұрын

    I wish I could still get a degree without university. I don't need it...all I need is Khan academy

  • @irazani97

    @irazani97

    6 жыл бұрын

    what do you study? medicine?

  • @biswarupsharma709

    @biswarupsharma709

    Жыл бұрын

    clinical aspects college ke bina kaise sikhega kuch bhi mat likh

  • @maromakeen9218
    @maromakeen92188 жыл бұрын

    brilliance

  • @JoyDivisionFan1987
    @JoyDivisionFan19873 жыл бұрын

    Thanks!!! I finally got it.

  • @dimaxxi1426
    @dimaxxi1426 Жыл бұрын

    thank u

  • @rebeccaaira5045
    @rebeccaaira50455 жыл бұрын

    he lowkey sounds like that TEDEd voiceover

  • @lambybread
    @lambybread5 жыл бұрын

    This is a great resource for sure, but all I hear is Prismo from adventure time ( was just waiting for him to ask the osmolarity of pickle brine)

  • @hudumba2207
    @hudumba22072 жыл бұрын

    Your video is ok but I agree with you but somehow I found this video on IV fluids more interesting more interesting --->This is a detailed version, @ Anyway I somehow felt that IV fluids have been covered better in the video link.

  • @Dozerson2
    @Dozerson23 жыл бұрын

    What about Normality?

  • @AshleyxScreamx
    @AshleyxScreamx6 жыл бұрын

    I’m so confused 😭

  • @a6039043
    @a603904311 жыл бұрын

    your mistaken. osmolality = Number of osmoses / mass of solvent (not solution). You just quoted osmolarity

  • @doctoraasem6399
    @doctoraasem63996 жыл бұрын

    What is the difference between osmole and mole ???

  • @jonestacara

    @jonestacara

    5 жыл бұрын

    doctor aasem exactly

  • @akshinbarathi8914

    @akshinbarathi8914

    2 жыл бұрын

    osmolality is the moles of number of particles or ions . moles is just the normal molkes. example one mole of NACL is one mole but 2 OSMOLE because the Na and Cl both ionize and exist independantly so the number of moiles of particles double\kind iff like vant off factor

  • @ahlemlecointe2862
    @ahlemlecointe286211 жыл бұрын

    noo that's molality, osmolality= Number of osmoses/ Volume of Solvent not the hole solution

  • @TheFujiwuji
    @TheFujiwuji7 жыл бұрын

    Totally confused. At around 0:12 he begins explaining the difference between molarity and molality by saying that they have the same numerator but that they''re divided by solution vs. being divided by solvent. But what is the difference between a solution and a solvent? When I look them both up, solution and solvent seem exactly the same, so why are molarity and molality any different from each other? Solution is something you put something into, but a solvent is also something you put something into. So in order to clarify two confusing, similar-sounding words here (molarity & molality), he's using two other confusing, similar-sounding words (solution & solvent). So frustrating. Thanks for any clarification.

  • @fan_melinda

    @fan_melinda

    7 жыл бұрын

    Hello! A solvent refers to the LIQUID in which a solute dissolves (e.g. water), and a solution refers to the MIXTURE formed when a solute (e.g. salt) has dissolved in a solvent. The solution contains both the solute AND the solvent. So if you take the examples given, salt is the solute, water is the solvent, and all together the solution is salt water.

  • @caribaez5711

    @caribaez5711

    6 жыл бұрын

    I am thinking that the molarity is the solute/solvent whereas the molality has to do witth the solvent only like water.

  • @manishashakya8835

    @manishashakya8835

    5 жыл бұрын

    You dissolve a solute into a solvent, for eg dissolving sugar in water. The solution is the homogeneous mixture formed by mixing the solute and the solvent. So, the sugar in water as a whole is a solution. If 1 mole sugar is dissolved in 1 L of sugar solution, its molarity is 1. But, if 1 mole sugar is dissolved in 1 kg of water, its molality is 1. I hope that clears your doubts.

  • @ahlemlecointe2862
    @ahlemlecointe286211 жыл бұрын

    osmolality= N osmoles / L solvent !!!