Practice Mass Percentage (w/w) (1.2.1) - Solutions

Practise this section

10 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What is the mass percentage of a solution with 15 g of solute and 85 g of solvent?
Show hintHide hint
Use the formula: mass % = (mass of solute / total mass) × 100.
Question 2.
If you have a solution of 12 g of sugar in 48 g of water, what is the mass percentage of sugar?
Show hintHide hint
Add the mass of sugar and the mass of water to find the total solution mass.
3Question 3.
What does mass percentage refer to?
- The amount of solute
- The ratio of solute to solution mass
- The volume of solute
Show hintHide hint
Remember it as a ratio.
4Question 4.
Mass percentage is expressed in what form?
- True
- False
Show hintHide hint
Think about how percentages work.
Question 5.
A cleaning product contains 12% sodium hypochlorite by mass. If you have 250 g of this solution, how much sodium hypochlorite is in it?
Show hintHide hint
Consider the proportions involved.
Question 6.
A 5% w/w potassium nitrate solution is prepared. If 100 g of water is added to 5 g of potassium nitrate, what would be the final mass percentage?
Show hintHide hint
Total mass is the key to updating the formula.

6 more questions in this section. Enroll free to practise them all.