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Q. What is molarity of pure water ?

AIIMSAIIMS 1995Solutions

Solution:

Density of water $=1 \,g / cm ^{3}$ and its molecular weight $=18$

Therefore $1000 \,cm ^{3}$ of water will weigh $1000\, g$ of water. We also know that molarity

$=\frac{\text { Mass of water }}{\text { Molecular weight }}$

$=\frac{1000}{18}$

$=55.56 \,M$