Energy — Test Answers

Which would increase the rate of dissolving salt into water?

To make a solution for an experiment, Gunther needs to add 40 g of a solute to 100 g of water. When making the solution at room temperature, he could only add 34 grams before the solute settled out.What could he do to dissolve the remaining 6 grams of the solute?

Which best describes solubility?

Carla is making two drinks. She is making one hot chocolate and one chocolate milk. Which best describes the agitation needed to make sure the cocoa powder is mixed in well?

Naomi has increased the pressure on a solution of liquid and gas in a closed container. What will this do to the gas in her solution?

The chart shows the solubility of different substances.

The solute will dissolve quicker if the solute is more

Oil and water placed in a jar will separate. Even when shaken and mixed, the oil still separates from the water.

The same amount of substance was added to four beakers of water. The treatments were placed in the chart.

Which refers specifically to a solution with as much dissolved solute as it can hold at a given temperature?

How does temperature affect the speed with which the solute dissolves?

The cell membrane around a cell forms a barrier that protects and regulates the cell. Certain chemicals can pass through the plasma membrane because they have similar chemical properties as the membrane.

Maceo is making rock candy. Which best describes the steps she should take?

Which refers specifically to a heated solution that holds more dissolved solution than it can hold at a lower temperature?

The chart shows the amount of solute that fully dissolved when added to 500 ml of water.

Four solutes are added to a solvent. All solutes have the same mass and solubility. The surface areas of four solutes are 2 mm2, 4 mm2, 6 mm2, and 10 mm2. Which solute will dissolve the quickest?

Three students are mixing the same type of solute in 500 ml of water. Jessica is heating her solution, Larry left his on the counter at room temperature, and Hunter is heating his solution while stirring it.

A substance is boiled repeatedly and stirred, but the solute never mixes with the solvent. Which best describes why?

Which most likely represents the process of dissolving carbon dioxide in soda?

Tanya was measuring the ability of different substances to dissolve in water. She mixed in each test tube the same amount of water and substance. She then measured the level of undissolved solute at the bottom of the test tube once it settled. Her results are in the chart.