Question

A solution is made containing 11.2 g of sodium sulfate per 95.0 g of water. What is the weigh / weight % or percent by mass of the solute?

Answer 1

Answer: -

10.5% is the Weight / weight % or percent by mass of sodium sulfate

Explanation: -

Mass of sodium sulfate = 11.2 g

Mass of water = 95.0 g

Total mass of the solution = Mass of sodium sulfate + Mass of water

= 11.2 + 95.0 = 106.2 g

Weight / weight % or percent by mass of the solute = (Mass of sodium sulfate / Total mass of the solution) x 100

= $\frac{11.2}{106.2} x 100$

= 10.5 correct to 3 significant figures.