Question

What mass of a 4.00 % NaOH solution by mass contains 15.0 g of NaOH?

Answer 1

375 g

Step-by-step explanation:

Let the total mass of the solution = x g

Given that the mass of NaOH in the solution = 15.0 g

Thus, mass of the solvent = x - 15.0 g

Given that the mass % of the solution = 4 %

So,

`Mass\ percent=\frac {Mass\ of\ the\ solute}{Mass\ of\ the\ solution}* 100`

So,

`4=\frac {15.0}{Mass\ of\ the\ solution}* 100`

Mass of the solution = 375 g