Unit 11: In Class Practice: Mass Percent

Front

What is mass percent?

Back

Mass percent is the mass of the solute divided by the total mass of the solution, multiplied by 100. It is expressed as a percentage.

Front

How do you calculate mass percent?

Back

Mass percent = (mass of solute / total mass of solution) x 100.

Front

Calculate the mass percent of solution if there is 100 g of sugar and 400 g of water.

Back

20%.

Front

What is the percent by mass of solute in 2.14 grams of potassium chloride dissolved in 25.0 grams of water?

Back

7.9%.

Front

What is the percent by mass of solute in 2.14 grams dissolved in 37.5 grams of water?

Back

5.4%.

Front

Calculate the number of grams of solute present in 475 g of 12.5% ammonium nitrate solution.

Back

59.4 g.

Front

Calculate the number of grams of solute present in 125 grams of 2.91% sodium chloride solution.

Back

3.64 g.

Front

What is the formula to find the mass of solute from mass percent?

Back

Mass of solute = (mass percent / 100) x total mass of solution.

Front

If a solution has a mass percent of 10% and the total mass is 200 g, how much solute is present?

Back

20 g.

Front

What does a higher mass percent indicate about a solution?

Back

A higher mass percent indicates a greater concentration of solute in the solution.