Solutes, solvents and how much will dissolve

Question 1

At 20 °C, 32 g of copper sulfate dissolves in 100 g of water to make a saturated solution. What mass dissolves in 50 g of water at 20 °C, in g?

Answer g

Question 2

Nail varnish does not dissolve in water but does dissolve in acetone. What does this show?

• A. Whether a substance dissolves depends on the solvent
• B. Water dissolves everything
• C. Acetone is a solute
• D. Nail varnish is a gas

Question 3

Which word describes this: the sugar stirred into tea?

• A. solute
• B. solution
• C. saturated solution
• D. insoluble

Question 4

10 g of salt is dissolved in 200 g of water. What is the mass of the solution, in g?

Answer g

Question 5

A student adds salt to water until some stays on the bottom however much they stir. What have they made?

• A. a gas
• B. an insoluble solvent
• C. a pure substance
• D. a saturated solution

Question 6

Which word describes this: sand that sinks to the bottom of water?

• A. solvent
• B. solute
• C. insoluble
• D. solution

Question 7

At 20 °C, 32 g of potassium nitrate dissolves in 100 g of water to make a saturated solution. What mass dissolves in 250 g of water at 20 °C, in g?

Answer g

Question 8

Which change would let more sugar dissolve in a cup of water?

• A. heating the water
• B. stirring more slowly
• C. using larger sugar lumps
• D. cooling the water

Question 9

Which word describes this: a substance that will not dissolve?

• A. solvent
• B. solute
• C. insoluble
• D. solution

Question 10

At 20 °C, 32 g of potassium nitrate dissolves in 100 g of water to make a saturated solution. What mass dissolves in 300 g of water at 20 °C, in g?

Answer g

Question 11

A student adds salt to water until some stays on the bottom however much they stir. What have they made?

• A. a saturated solution
• B. a pure substance
• C. a gas
• D. an insoluble solvent

Question 12

Which word describes this: a solution in which no more solute will dissolve?

• A. saturated solution
• B. insoluble
• C. solvent
• D. solution

Question 13

15 g of salt is dissolved in 150 g of water. What is the mass of the solution, in g?

Answer g

Question 14

Which change would let more sugar dissolve in a cup of water?

• A. stirring more slowly
• B. cooling the water
• C. heating the water
• D. using larger sugar lumps

Question 15

Which word describes this: a substance that will not dissolve?

• A. saturated solution
• B. solvent
• C. insoluble
• D. solute

Question 16

At 20 °C, 32 g of copper sulfate dissolves in 100 g of water to make a saturated solution. What mass dissolves in 300 g of water at 20 °C, in g?

Answer g