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Science / Chemistry / Grade 9 / sk9ci

Use Total Solution Mass as the Denominator - Practice 1

Mass percent is solute mass divided by total solution mass, multiplied by 100.

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Mass percent is solute mass divided by total solution mass, multiplied by 100. The denominator includes both solute and solvent, not only the solvent. These are ideal bookkeeping examples with no loss.

Worked example

10 g solute plus 90 g solvent makes 100 g solution, so the solute is 10% by mass.

10 g solute plus 90 g solvent makes 100 g solution, so the solute is 10% by mass.
10 g solute plus 90 g solvent makes 100 g solution, so the solute is 10% by mass.
Question 1 Paper solution 1 has 4 g solute and 196 g solvent. What is the solute mass percent? Enter the number without %.
Question 2 Paper solution 2 has 6 g solute and 194 g solvent. What is the solute mass percent? Enter the number without %.
Question 3 Paper solution 3 has 8 g solute and 192 g solvent. What is the solute mass percent? Enter the number without %.
Question 4 Paper solution 4 has 10 g solute and 190 g solvent. What is the solute mass percent? Enter the number without %.
Question 5 Paper solution 5 has 12 g solute and 188 g solvent. What is the solute mass percent? Enter the number without %.