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Total questions: 21
Worksheet time: 11mins
Magnesium hydroxide, Mg(OH)2, is a common antacid. What is the molar concentration if 29.0 g of Mg(OH)2 is dissolved in 1.00 L of water?
0.29 M
0.50 M
1.00 M
2.00 M
How many milliliters of a 4.0 M NaCl solution will be needed to make 500 mL of a 2.0 M NaCl solution?
100 mL
250 mL
500 mL
2500 mL
What is the concentration in molarity when 11.0 g of CaCl2 is added to water to make a 100 mL solution?
0.10 M
1.00 M
11.0 M
110 M
Determine the molarity of a solution that is prepared by diluting 200 mL of 0.450 M K2Cr2O7 with 600 mL of water.
0.075 M
0.112 M
0.150 M
0.225 M
What is the concentration of a solution if 2.0 moles of sodium chloride is dissolved in 0.50 liter of water?
0.5 M
1.0 M
2.0 M
4.0 M
What is the concentration of a solution that was made by adding 10.00 g of KF in 2.0 L of water?
(molar mass K = 39.09; F = 19.99)
5.0 mol/L
0.25 mol/L
0.13 mol/L
0.085 mol/L
A student dissolves sodium chloride, NaCl, in distilled water. Which word best describes the water in this situation?
reactant
product
solute
solvent
A key component of a carbonated beverage is the carbon dioxide dissolved as a solute in water as the solvent. Which of the following explains why a bottle of club soda releases bubbles when opened?
Carbon dioxide is supersaturated in water.
Carbon dioxide is unsaturated in water.
Carbon dioxide is the solvent in the solution.
Carbon dioxide reacts with the oxygen in the environment.
A student investigated four different solutions and recorded observations and measurements in the table.
Based on the observations, which solution contains a solute that is a nonelectrolyte?
Sol'n A
Sol'n B
Sol'n C
Sol'n D
How is a supersaturated aqueous solution of salt in water prepared?
Add salt to water and heat until the salt dissolves completely.
Prepare a warm saturated solution and then cool the solution.
Prepare a cool saturated solution and then warm the solution.
Add a large amount of salt to water and then filter off the excess salt.
A student mixes oil and water in a flask. After a while, the oil and water separate into two layers. Which statement best explains this result?
Only one of the substances can act as a solvent to the other.
Only one of the substances can act as a solute to the other.
Neither substance can act as a solvent to the other.
Neither substance is able to form solutions.
The density of 200 mL of water was determined, and then 20 grams of sugar was dissolved in the water. The student determined the density of the sugar-water solution and recorded the collected data in a table. The sugar in this investigation is
the solute.
undergoing chemical change.
the solvent.
changing from a solid to a gas.
The temperature of a stream whose water is saturated with dissolved oxygen increases from 15°C to 22°C on a sunny day. How does this affect the concentration of oxygen in the water?
The oxygen concentration decreases because the solubility of oxygen decreases.
The concentration of oxygen does not change but the solution is no longer saturated.
The solubility of oxygen increases but the water remains saturated with oxygen.
The oxygen concentration is not affected because temperature is not related to saturation.
Which term correctly describes a solution containing 30 g K2CrO7/100g H2O at 50°C?
subsaturated
saturated
supersaturated
unsaturated
Which term correctly describes a solution containing 50 g KCl/100g H2O at 60°C?
subsaturated
saturated
supersaturated
unsaturated
Which of the following increases the rate at which a solid solute will dissolve in a beaker of water?
placing the beaker in a bucket of ice
adding the solute slowly into the beaker
crushing the solute before placing it into the beaker
agitating the beaker before placing the solute
In an experiment, 2.0 g of solid sodium bicarbonate (NaHCO3) was tested for solubility. At 20°C and stirring, it took 60 minutes to dissolve. At 20°C and no stirring, it took 90 minutes to dissolve. Why is stirring a factor in the dissolving of the NaHCO3?
Stirring increases the contact of the solute to the solvent.
Stirring increases the temperature of the solution.
Stirring increases pressure.
Stirring increases surface area.
A student is dissolving sugar in water to make candy. She notices that sugar lumps are forming at the bottom of the pan. What could she do to help more of the sugar dissolve?
heat the solution
cool the solution
add more sugar to the pan
take some water out of the pan
Two samples of the substance shown will be dissolved in a solution. One sample is a single large piece, and the other has been broken into many smaller pieces.
Which sentence best describes how the dissolution will proceed?
The substance will dissolve more quickly if broken into small pieces because of increased surface area.
The substance will dissolve more slowly if broken into small pieces because more particles can react.
The substance will dissolve more quickly if broken into small pieces because of decreased mass.
The substance will dissolve more slowly if broken into small pieces because of increased mass.
Why will a cold glass of soda remain carbonated longer than a warm glass of soda?
Ice in the glass creates more surface area for the attachment of the carbonated gas.
Condensation against the cold glass surface reduces the dissolving rate of the gas.
Higher temperature liquids release carbonation into the atmosphere more slowly.
Carbon dioxide is more soluble in liquids at lower temperatures.
100.0 mL of 2.500 M KBr solution is on hand. You need 0.5500 M. How much water should be added to create this concentration?
454.5 mL
354.5 mL
22 mL
137 mL
