Question

What is the mass percent of potassium sulfate in solution if 78g of potassium sulfate is dissolved in 500 mL of water? (The density of water is 1.00 g/mL)

Answer 1

13.5 %

Step-by-step explanation:

First we calculate the mass of 500 mL of water, using its density:

• Volume * Density = Mass

• 500 mL * 1.00 g/mL = 500 g

Then we calculate the mass percent of potassium sulfate, using the formula:

Mass of Potassium Sulfate / Total Mass * 100%

• 78 g / (78 + 500) g * 100 % = 13.5 %