Homework Practice

Printable assignment

Concentration Calculator: How Strong Is the Solution?

Section A: Concentration Concepts

Question 1mcq

Concentration of a solution means:

A.Mass of container

B.Temperature of room

C.Amount of solute present in a given amount of solution

D.Colour of solute only

Question 2mcq

A dilute solution contains:

A.More solute than solvent always

B.Less solute compared with the amount of solution

C.Only solid particles

D.No solvent

Question 3mcq

If more salt is added and dissolved in the same amount of water, concentration:

A.Cannot change

B.Decreases

C.Becomes zero

D.Increases

Question 4mcq

A saturated solution at a given temperature:

A.Has no solute

B.Cannot dissolve more solute at that temperature

C.Contains only solvent

D.Is always colourless

Question 5mcq

If a solubility graph rises with temperature, it means:

A.Less solute always dissolves

B.Solubility is zero

C.The solute becomes a gas always

D.More solute dissolves at higher temperature

Question 6mcq

Two solutions have same volume, but one has twice the dissolved salt. The saltier one is:

A.More dilute

B.A compound

C.Pure solvent

D.More concentrated

Section B: Percentage Calculations

Question 7mcq

A solution has 5 g salt in 100 g solution. Mass by mass percentage is:

A.95%

B.5%

C.10%

D.50%

Question 8mcq

10 g sugar is dissolved to make 200 g solution. Mass by mass percentage is:

A.2%

B.5%

C.20%

D.10%

Question 9mcq

4 g solute is present in 100 mL solution. Mass by volume percentage is:

A.0.4%

B.40%

C.4%

D.25%

Question 10mcq

8 g solute is present in 200 mL solution. Mass by volume percentage is:

A.8%

B.4%

C.16%

D.2%

Question 11mcq

20 mL alcohol is mixed to make 100 mL solution. Volume by volume percentage is:

A.80%

B.50%

C.20%

D.10%

Question 12mcq

15 mL liquid solute is present in 75 mL solution. Volume by volume percentage is:

A.15%

B.5%

C.75%

D.20%