Question

If 15% (m/m) NaOH solution has a total mass of 375 g, how much NaOH was used to make this sample?

Answer 1

the mass by mass percentage of solution is 15 %

total mass of solution = 375 g

Mass of NaOH used in this process = $\frac{15 \times 375}{100}=56.25 g$

Mass of NaOH used to make this solution = 56.25 g