What mass of NaOH is needed to produce 400.g of a solution that is 12.0 % by mass?
A)4.80 g
B)48.0 g
C)352 g
D)4800 g

Question

Quizplus · Accepted Answer

If a solution is 12.0% NaOH by mass, it means that there are 12.0 g of NaOH for every 100.0 g of solution. Therefore, to determine the mass of NaOH needed to produce 400.0 g of solution, we can set up a proportion:

12.0 g NaOH / 100.0 g solution = x g NaOH / 400.0 g solution

Cross-multiplying and solving for x, we get:

x = (12.0 g NaOH / 100.0 g solution) * 400.0 g solution
x = 48.0 g NaOH

So, the mass of NaOH needed is 48.0 g, which corresponds to answer choice B.

What Mass of NaOH Is Needed to Produce 400