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Molarity and Concentration

  1. Nov 29, 2016 #1
    Concentration measures the number of moles of solute per liter of solution, besides that it can be used to measures also the ratio of mass per liter.
    Molarity also measures the number of mole of a solute per liter of solution.
    Then what is the difference between these two definitions? They seem to be alike.
     
  2. jcsd
  3. Nov 29, 2016 #2

    Borek

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    No, concentration is a measure of amount of something in something. It doesn't have to be expressed in moles per liter, there are many ways to express the concentration (most common ones being molarity, molality, mass/volume fraction - often expressed in terms of percentage or parts per something - and molar fraction).

    Molarity is much more narrow term than the concentration.
     
  4. Nov 29, 2016 #3

    Bystander

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    "They" lack a specification of temperature.
     
  5. Nov 30, 2016 #4
    Then molarity, molality ... Are only special cases of concentration?
     
  6. Nov 30, 2016 #5

    Borek

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    You can put it that way.
     
  7. Nov 30, 2016 #6

    DrClaude

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    They are not "special cases," they are measures of concentration.
     
  8. Nov 30, 2016 #7

    Bystander

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    "Molarity," M, is temperature dependent, and "molality," m, is temperature independent.
     
  9. Nov 30, 2016 #8

    Borek

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    Perhaps "specific cases" would be better?

    I have a feeling some nuances are lost in translation between my thinking and my English :/
     
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