Solutions, Acids & Bases Review

Adding powdered Gatorade to water makes a tasty solution. What is the solvent in this example?

• water

• salt and sugar

• Gatorade liquid

• Gatorade powder

If 180 grams of potassium iodide is dissolved in 100g of water at 30°C, a(n) __________ solution is formed. Refer to the solubility chart provided.

• saturated

• unsaturated

• oversaturated

• supersaturated

Tags

NGSS.MS-PS1-2

A person opens a 2-liter bottle of cola at a picnic. If the cap is left off the bottle, the cola will become 'flat' or lose its carbonation. Which statement below BEST summarizes why the cap must be kept tightly in place if the cola is to remain fresh?

• The cap prevents the liquid in the cola from evaporating.

• The cap keeps the atmospheric gases and liquid from mixing in the bottle.

• The cap keeps warm air from entering the two-liter bottle and raising the temperature of the cola solution.

• The cap keeps the pressure of the gas in the bottle at a high level preventing carbon dioxide from leaving the solution.

Graph B shows the solubility of which types of substances?

• solid dissolved in a gas

• gas dissolved in a liquid

• solid dissolved in a liquid

• liquid dissolved in a liquid

Ira is working in a lab with an unknown solution. When he inserts the electrical conductivity tester in the unknown, the bulb begins to glow brightly. Which of these would BEST describe the unknown liquid?

• It contains polar molecules that conduct electricity.

• The water that the solid is dissolved in conducts electricity.

• It contains a ionic compound that conducts electricity in solution.

• It contains a covalent compound that conducts electricity in solution.

Identify the solution that contains both the solute and solvent in the solid phase.

• air

• NaCl

• bronze

• salt water

Jose makes two mixtures. Mixture one contains 10 g of salt dissolved in 50 mL of water. Mixture two contains 20 g of salt dissolved in 50 mL of water. Compare the concentrations of the two mixtures.

• Both mixtures are equally concentrated.

• The mixtures are of equal concentration.

• Mixture one is more concentrated than mixture two.

• Mixture two is more concentrated than mixture one.

Matt, Erin, and Lauren were having a challenge to see who could dissolve a one-pound cube of sugar the quickest. Matt puts his sugar cube in a bucket of water and stirs it with a wooden spoon. Erin heats up the water before putting it into her bucket and uses a wood spoon to stir it. What must Lauren do to make her sugar cube dissolve quicker than Matt and Erin?

• Place the sugar cube into a bucket of cold water and stir really, really fast.

• Place the sugar cube into a bucket of hotter water and stir slower than Matt and Erin.

• Get a smaller container with less water and put the sugar cube in it and shake it.

• Break the sugar cube into smaller pieces, put into hot water and stir it.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which scenario would result in the fastest rate of dissolution?

• A sugar cube in hot water.

• A sugar cube in cool water.

• Powdered sugar in hot water.

• Powdered sugar in cool water.

Tags

NGSS.MS-PS1-4

Usually, when the particle size is decreased, what will happen to the rate of dissolving?

• It will stop.

• It will increase.

• It will decrease.

• It will remain constant.