WorksheetsSolutions & Mixtures Review
Total questions: 32
Worksheet time: 28mins
A saturated solution of KClO3 is prepared at 80°C using 100mL of water. How many grams of solute will come out of the solution if the temperature is cooled to 30°C?
56 g
34 g
40 g
21
Which substance is most soluble in water at 20°C?
NaNO3
HCl
KI
NH3
What would most likely happen if 40g of NaCl were added to water at 50°C?
Some of the solute would not dissolve.
All of the solute will dissolve.
Everything would remain the same.
What is the maximum amount of KCl that can be dissolved in 200mL of water at 40°C?
60
80
40
20
How do you know that SO2 is a gas?
↑temp↓soluble
↑temp↑soluble
↓temp ↓soluble
To dissolve a cube of sugar, which technique will increase the rate of dissolution?
Add it to cold water.
Heat it.
Use organic sugar.
How would you create a supersaturated solution with sugar?
By cooling the solution to dissolve excess sugar and then heating the solution.
By adding excess sugar to an unsaturated solution of sugar and water.
By heating the solution to dissolve excess sugar and then allowing the solution to cool slowly and stay dissolved.
By adding excess sugar to a saturated solution of sugar and water.
To separate fish poop from water, which separation technique would be best to use?
Filtration
Evaporation
Magnetism
Distillation
To separate a solution of saltwater, which separation technique would you use?
Filtration
Evaporation
Magnetism
Centrifuging
Spiderman was making some grape-flavored Kool-Aid for the Justice League. So she added a packet of Kool-Aid and 4 cups of water.
The Kool-Aid is the solvent and water is the solute.
The Kool-Aid is the solution and water is the solute.
The Kool-Aid is the solute and water is the solvent.
Which image shows a compound?
A
B
C
Which image shows a mixture?
A
B
C
Which image shows a diatomic element?
A
B
C
What is the universal solvent?
Water
Sulphuric acid
Aqua regia
Ethanol
An electrolyte is a solid that _____ in a solvent and _____ electricity.
dissolves, conducts
dissolves, does not conduct
insoluble, conducts
insoluble, does not conduct
If 70g of NH4Cl is added to 200g of water at 70°C, what kind of solution is made?
Unsaturated
Saturated
Supersaturated
What is a substance that is dissolved in another substance called?
In the image, a powder is about to be added to the liquid. What hould be done to help the powder dissolve faster?
Stir the powder in the liquid.
Freeze the mixture.
Add more powder to the liquid.
Store the mixture in a dark place.
Another name for a homogeneous mixture is _____
To make Kool-Aid, you add sugar and water together. Identify which of these ingredients is the solvent.
Water
Sugar
Water and sugar are both solvents.
By heating the mixture.
By adding more solvent.
By adding more solute.
By stirring the mixture.
When a solvent cannot hold any more solute, it is known as a _____ solution.
How many grams of K2Cr2O7 are soluble in 100g of water at 95ºC?
Which solute is the most soluble at 10⁰C?
Which solute is the least soluble at 90⁰C?
By dissolving a lot of solvent into it.
By dissolving a small quantity of solute into it.
By dissolving more than the normal quantity of solute.
By dissolving a very large quantity of solvent.
When 20g of potassium chlorate, KClO3, is dissolved in 100g of water at 80ºC, the solution can be correctly described as _____
supersaturated
saturated
unsaturated
When 50g of KCl is dissolved in 10g of water at 50ºC, the solution is _____
supersaturated
unsaturated
saturated
Which of the following actions will not increase the rate of dissolution?
Stirring the solution.
Decreasing the temperature.
Increasing the surface area of the
solute.
Increasing the temperature.
You are given a small beaker of solution at room temperature. You add a small amount of solute to the solution, and it dissolves. The solution was _____
saturated
unsaturated
concentrated
supersaturated
How do you know when a solution is saturated?
No more solute dissolves but instead falls to the bottom of the container.
The solution bubbles.
The solution is clear and no solute is visible.
