Question #acc2c

1 Answer
SCooke
Mar 23, 2016

Molarity = Moles/Liter
Moles = grams/gram-molecular weight

Explanation:

You can calculate the moles first, then corect for the volume or adjust the volume and mass togetther before calculating molarity. You have 32.1g of KNO3 in 0.5L, or the equivalent of 64.2g in 1.0L.

32.1g/101.1g/mole KNO3= 0.3175 mole
0.3175mole/0.5L = 0.635 M solution

or, 64.2g/101.1g/mole/1.0L = 0.635 M

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