AS Practise Chemistry coursework question

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Discussion Overview

The discussion revolves around a chemistry coursework question regarding the relationship between mass concentration, molar concentration, and molar mass. Participants explore how to express this relationship mathematically and seek clarification on the terminology and explanations required.

Discussion Character

  • Homework-related, Conceptual clarification

Main Points Raised

  • One participant presents the equation as molar mass = Mass concentration/Molar concentration and seeks clarification on the required explanation.
  • Another participant suggests rearranging the equation to molar concentration = mass concentration/molar mass, indicating this form may clarify the relationship.
  • A third participant expresses confusion about terminology and asks if rearranging the equation implies it is equivalent to the equation no. moles = Mass/Mr, seeking confirmation on this point.
  • A later reply notes that while the analogy between the equations is clear, they are not the same and suggests writing both equations with units to highlight their differences.

Areas of Agreement / Disagreement

Participants do not reach a consensus on whether the rearranged equation is equivalent to the equation no. moles = Mass/Mr, indicating a lack of agreement on the interpretation of the relationships involved.

Contextual Notes

There is uncertainty regarding the specific explanation required for the homework question, and participants express differing interpretations of the relationships between the equations.

Bennybo100
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Homework Statement



Write an equation in words to show relationship between mass concentration, molar concentration and molar mass and give a short explanation.

Homework Equations



I understand that the equation is:

molar mass = Mass concentration/Molar concentration

The Attempt at a Solution



Where it says 'give a short explanation', what exactly does it want me to say? Does it have something to do with the equation no. moles = Mass/Mr?
 
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I would put the equation in the form

[tex]\text{molar concentration} = \frac{\text{mass concentration}}{\text{molar mass}}[/tex]

in which case it is much more obvious why it is related to the other equation you listed.
 
Thank you very much!

I'm not too good at all this terminology, so could you help me a bit more?

Does rearranging the equation to what you've stated mean that it is the same as the equation no. moles = Mass/Mr? Is this the 'short explanation' the question requires?

Thanks for the help,
Ben.
 
It is not the same but the analogy is obvious. You may try to write both equations with units and see how they differ.
 

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