C=M/V or C=N/V?

[Stringy]

Hey guys, I was doing this question for a titration, I found the moles of the citric acid, and the volume is given, So I used the formula C=N/V. Although in the sample answer, they used C=M/V which gave a completely different value (I know ones in mol/L and the other g/L). So when it comes to these questions how do I know what one to choose? In this one they give you the MW of citric acid, so I suppose that indicates you need to use C=M/V?

[KT Nyunt]

Hey guys, I was doing this question for a titration, I found the moles of the citric acid, and the volume is given, So I used the formula C=N/V. Although in the sample answer, they used C=M/V which gave a completely different value (I know ones in mol/L and the other g/L). So when it comes to these questions how do I know what one to choose? In this one they give you the MW of citric acid, so I suppose that indicates you need to use C=M/V?

Molar mass is always in g/mol so this wouldn't have been any indication to use C=M/V. I would've done the same as you and found it in N/V. I think either is acceptable unless they specify otherwise or they express another substance's concentration in g/L