Question

What is the molarity of a NaNO3 solution prepared by adding 200 g of NaNO3 to 700ml of H2O.

Answer 1

Molecular weight of NaNO3 is 84.9947 g/mol .

So, 84.9947 gm of NaNO3 added to 1000 ml water makes 1 M solution

Therefore, 1 gm of NaNO3 in 1 ml water makes 1000/84.9947 M solutiin

So, 200 g NaNO3 in 700 ml will create 1000×200 / 84.9947×700 = 3.36 M solution.