Lesson Worksheet: Solubility: Solutes and Solvents Science

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In this worksheet, we will practice describing the effect the surface area of a solute, the type of solute, and the quantity of a solvent have on the rate of dissolving.

Q1:

We can make a solute dissolve faster in a solvent in a number of ways:

The surface area of the solute can be .
The temperature of the solvent can be .
The amount of solvent can be .
The rate of stirring can be .

Which of the following completes all the sentences?

ASped up
BDecreased
CKept the same
DIncreased
ESlowed down

Q2:

Sugar is a solute, which means it can dissolve in a solvent such as water.

Michael is designing an experiment to investigate how the surface area of a solute affects how quickly it dissolves. He chooses sugar as his solute and water as his solvent.

Here are the steps of Michael’s experiment:

Measure 100 mL of water into each beaker.
Add a sugar cube to beaker 1, timing how long it takes to dissolve.
Add a crushed sugar cube to beaker 2 and stir, timing how long it takes to dissolve.
Record and compare the results.

Michael’s experiment is not a fair test. What did he do wrong?

AHe used the same volume of water in each beaker.
BHe crushed one sugar cube and not the other.
CHe used the same temperature of water in each beaker.
DHe stirred the contents of one beaker and not those of the other.

Q3:

Table salt is a solute that dissolves in water.

By what other name is table salt known?

ASodium chloride
BSodium carbonate
CSodium bicarbonate
DNone of the answers are correct.

Q4:

Jacob is investigating if the surface area of a solute such as sugar affects how quickly it dissolves.

To make his test fair, he uses the same

amount of water,
temperature of water,
rate of stirring,
amount of sugar.

Here are the results of his experiment.

Form	Sugar cube	Granulated sugar
Time Taken to Dissolve	30 seconds	20 seconds

Which form of sugar has the larger surface area?

AGranulated sugar
BSugar cube

Fill in the blanks: Jacob concludes that the the surface area of a solute is, the the solute dissolves.

Asmaller, faster
Blarger, slower
Clarger, faster

Q5:

Emma is investigating whether some solutes dissolve quicker than others. She predicts that sodium chloride and sodium carbonate have the same rate of dissolving.

To make her test fair, she keeps each of these the same:

volume of water,
temperature of water,
rate of stirring,
mass of solute.

Here is a graph of her results.

Do the results support her prediction?

AYes
BNo

Which solute dissolves faster?

ASodium chloride
BSodium carbonate

Q6:

True or False: The type of solute does not affect the rate of dissolving if added to the same amount of solvent and at the same temperature of the solvent.