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WorksheetsSOLUTIONS
Total questions: 25
Worksheet time: 16mins
What does "like dissolves like" mean?
polar solvents dissolve in polar solutes
polar solutes dissolve in polar solvents
non-polar solvents dissolve in polar solutes
non-polar solutes dissolve in polar solvents
Gases are more soluble at ______temps and _____pressures
high, low
low , high
high, high
low, low
How does a solution become supersaturated?
Vigorous stirring to dissolve more solute than usual.
Heat the solution to increase the solute then let it cool.
Add more solvent to lower the concentration.
Keep pouring solute in the solvent until it goes in.
Which would NOT increase the rate at which a sugar cube dissolves?
Reducing the amount of solvent
Crushing the sugar cube
Stirring the solution
Heating the solvent
Three 10 g samples of sugar are represented below.
Sample A dissolves in water more slowly than sample B.
Sample B dissolves more slowly than sample C.
Which of the following best explains why sample A dissolves more slowly than the other two?
It has the most volume.
It has the smallest surface area.
It has the largest number of sugar molecules.
It has the fewest bonds between sugar modules.
A student pours mineral salts into a bottle of cold water. Which of the following best explains why shaking the bottle will affect the dissolving rate of the salt?
Shaking exposes the salts to the solvent more quickly.
Shaking helps more water evaporate.
Shaking equalizes the water temperature.
Shaking causes more ions to precipitate out of solution.
A technican prepared a solution by heating 100 mL of distilled water while adding KCl crystals until no more KCl would dissolve. She then capped the clear solution and set it aside on the lab counter. After several hours she noticed the solution had become cloudly and some solid had settled to the bottom of the flask. Which statement best describes what happened?
As the solution cooled, evaporation of water increased the KCl concentration beyond its solubility.
Water molecules, trapped with the KCl crystals, were released after heating.
At lower temperatures the solubility of KCl decreased and recrystallization occurred.
At increased temperatures the solubility of KCl increased and remained too high after cooling.
Which of these are examples of liquid in liquid
Bromine in CS2
Ethanol in water
H2SO4 in water
Acetone in water
Solubility of KCl in
27 g
34 g
39 g
25 g
What is dielectric constant
Value of charge of ionic compounds
Constant of charge
value of electricity passing through water at a certain point
constant change of current
Which of the following are non - polar compounds ?
Benzene
Ethane
Polypropylene
Polyethylene
In case of some solids, the rate of dissolution increases with temperature to a certain point and decreases thereafter
True
False
Both
None
100 g of KCl is made to dissolve 267 g of solvent. Find solubility.
0.37
2.67
1.33
2.19
A student is preparing solutions for a laboratory experiment by dissolving solid solutes in liquid solvents. Which action will increase the rate of solubility
lowering the temperature of the solvent
stirring the solute in the solution
increasing the pressure on the solution
increasing the particle size of the solute
What are the uses of solubility curves
The solubility curve helps us to compare the solubilities of different substances at the same temperature.
We can know the change in the solute composition of a substance.
We can know preferential precipitation of different salts
Amount of solvent dissolving in solute can be known
