Question

A 5.345g sample of NaHCO3 is dissolved in enough water to make 300.0ml of solution. What is the molarity

Answer 1

Answer: 0.208 M

Explanation:

Convert NaHCO3 to moles.

$\frac{5.2345 g}{1} * \frac{1 mol}{84.01 g} = 0.0623 mol$

Molarity is moles over liters.

$M = \frac{0.0623 mol}{0.3000 L} = 0.208 M$