Question

a solution is made by adding 12.7 g of calcium sulfate to 502 g of water. what is the percent mass of calcium sulfate in this solution.

Answer 1

2.47%

Step-by-step explanation:

The formula for percent by mass is

mass of solute / mass of solution x 100

We are given the following:

Mass of solute = 12.7 grams

Mass of solvent = 502 g

We know that mass of solution = mass of solvent + mass of solute

Therefore,

Mass of solution = 12.7 g + 502 g = 514.7 g

Finally, use the equation to solve for the answer

12.7 g / 514. 7 g x 100 = 2.47% (Rounded to three sig figs)