Factors Affecting Solubility - Section 8.2 Quiz

Which factor would not affect the solubility of sugar in water?

Add salt to the water
Heat the water and sugar
Grind the sugar to make it finer
Stir the water and sugar

Imagine that you performed an experiment in which you dissolved different samples of sugar (sugar cubes, extra fine sugar and regular table sugar) into water samples to compare how long they took to dissolve

Which factor would be least important to the design of this experiment?

All the samples must be tested at exactly the same time of day.
The sugar samples must all contain only sugar and water.
The same amount of sugar must be used in each sample.
The water samples must all be at the same temperature.

The following illustration shows what happens when salt is added to water.

Which statement about the motion of salt and water particles is false?

Only the salt particles move around
The process illustrates dissolution
The square structure in the diagram on the far left represents a salt crystal.
The diagram to the far right illustrates a salt solution.

Which process or processes affect the speed of dissolving?

Particle size, temperature and stirring
Particle size only
Stirring only
Particle size and stirring only

Water contains dissolved oxygen that fish can breathe. Which factor would not increase the amount of oxygen in the water of a fish aquarium?

Place the water under brighter light
Agitate the water
Place the water in a shallower container
Cool down the water

Most solutes dissolve faster in a solvent when the temperature is increased. Which solvent/solute listed below is an exception to this rule?

Water/oxygen
Water/salt
Water/sugar
Copper/zinc

Which statement about the process of dissolving is true?

The solute spreads out in all directions in a solvent because the solvent and solute particles attract one another
Once a solute, such as a salt crystal, is dissolved in a solvent, such as water, it can never return to its original crystal state
The process of dissolving releases energy in the form of heat
Applying heat often speeds up the process of dissolving because it breaks down the repellent barrier of the solute particles

Which substance listed below is not a common solvent?

Hand lotion
Nail polish remover
Water
A bar of soap

Crystal growing is a popular hobby. Below is a photograph of a beautiful and fairly easy to grow copper sulfate crystal. To make this crystal, copper sulfate powder was added to water to create a supersaturated solution.

Imagine that you have created a copper sulfate crystal formation and left it in its saturated solution in a jar on your dresser. Your little sister, trying to be helpful, added more water to your creation while you were gone for the weekend. What most likely happened to your creation as a result of your sister's actions?

The crystals are gone
The crystal formation is larger
It is unchanged except with more water in the jar
The entire contents of the jar has solidified into one mass

Imagine that you have created a solution of sugar and water in science class. Your teacher has asked you to retrieve the sugar in its dry state. Which plan of action below should you choose?

Let the water evaporate
Boil the solution and let it cool back down to room temperature
Freeze the solution
Do nothing because it is impossible to retrieve the sugar