Molarity vs. Concentration: What's the Difference?

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Discussion Overview

The discussion centers on the distinction between molarity and concentration, exploring definitions, interpretations, and the implications of these terms in various contexts. Participants examine how these concepts relate to one another and the conditions under which they are defined.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants assert that concentration measures the number of moles of solute per liter of solution, while others argue it can also refer to mass per liter and other expressions.
  • There is a suggestion that molarity is a narrower term than concentration, implying that molarity is just one way to express concentration.
  • One participant questions the definitions, noting that they lack a specification of temperature, which may affect their interpretation.
  • Some participants propose that molarity and molality could be viewed as special cases of concentration, while others challenge this characterization, stating they are measures of concentration instead.
  • A participant highlights the temperature dependence of molarity compared to the temperature independence of molality.
  • There is a suggestion that the term "specific cases" might better describe the relationship between molarity, molality, and concentration.

Areas of Agreement / Disagreement

Participants express differing views on whether molarity and molality are special cases of concentration or simply measures of concentration. The discussion remains unresolved regarding the precise definitions and relationships among these terms.

Contextual Notes

Some participants note that nuances may be lost in translation, indicating potential limitations in communication and understanding of the concepts discussed.

Any Help
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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.
 
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Any Help said:
Concentration measures the number of moles of solute per liter of solution

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.
 
Any Help said:
Then what is the difference between these two definitions? They seem to be alike.
"They" lack a specification of temperature.
 
Borek said:
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.
Then molarity, molality ... Are only special cases of concentration?
 
Any Help said:
Then molarity, molality ... Are only special cases of concentration?

You can put it that way.
 
Any Help said:
Then molarity, molality ... Are only special cases of concentration?
They are not "special cases," they are measures of concentration.
 
"Molarity," M, is temperature dependent, and "molality," m, is temperature independent.
 
DrClaude said:
They are not "special cases," they are measures of concentration.

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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