ATAR Notes: Forum
VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: cindywindy on July 16, 2016, 09:04:28 pm
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I'm confused, could someone please tell me when are supposed to/allowed to use c=m/v to calculate concentration versus using c=n/v? ??? Other than the kind of information we're given, is there a specific kind of situation we're supposed to use it in like how the dilution formula is only to be used when a solution becomes diluted?
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I'm confused, could someone please tell me when are supposed to/allowed to use c=m/v to calculate concentration versus using c=n/v? ??? Other than the kind of information we're given, is there a specific kind of situation we're supposed to use it in like how the dilution formula is only to be used when a solution becomes diluted?
Use the formulae as you need them. If you have the mass and volume, use c=m/v. If you have mol and volume, use c=n/v
Also remember that they're in different units. The former is g/L and the latter mol/L
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I'm confused, could someone please tell me when are supposed to/allowed to use c=m/v to calculate concentration versus using c=n/v? ??? Other than the kind of information we're given, is there a specific kind of situation we're supposed to use it in like how the dilution formula is only to be used when a solution becomes diluted?
Mr. T-Rav has provided a great explanation, but I'd just like to add something to that.
As I'm sure you would be aware of, there are many different ways in which one can measure concentration. This can be done in terms of mol/L (the most common, c=n/v), or even in terms of percentages/ratios by mass and volume (think ppm, alcohol concentration, chloride concentration, etc). So always remember to be specific when quoting/answering any concentration questions and be sure to include the proper units.
As for c=m/v, whilst this is strictly a form of concentration, it's not one that is commonly used. However, it should be noted that this can be known as a density formula (make sure units correspond), which can actually be rather useful in some situations.
Hope that helped and didn't confuse you! :)
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Use the formulae as you need them. If you have the mass and volume, use c=m/v. If you have mol and volume, use c=n/v
Also remember that they're in different units. The former is g/L and the latter mol/L
Oh okay, thank you!
Mr. T-Rav has provided a great explanation, but I'd just like to add something to that.
As I'm sure you would be aware of, there are many different ways in which one can measure concentration. This can be done in terms of mol/L (the most common, c=n/v), or even in terms of percentages/ratios by mass and volume (think ppm, alcohol concentration, chloride concentration, etc). So always remember to be specific when quoting/answering any concentration questions and be sure to include the proper units.
As for c=m/v, whilst this is strictly a form of concentration, it's not one that is commonly used. However, it should be noted that this can be known as a density formula (make sure units correspond), which can actually be rather useful in some situations.
Hope that helped and didn't confuse you! :)
No it didn't, you were a great help! :) You've also cleared my confusion of seeing it being called "density formula" before, thank you~