Mixtures — Unit test

Question 1

Which would increase the rate of dissolving salt into water?

Revolt · Accepted Answer

more surface area

Question 2

Three grams of the same substance in different phases are stored in three different containers. Each container is barely large enough to hold the substance.Which statement can be known about the behavior of the atoms in each container?

Revolt · Accepted Answer

The atoms in the solid would be vibrating in position.

Question 3

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?

Revolt · Accepted Answer

Heat the solution, dissolve the solute, and let the solution cool verifying nothing settled out.

Question 4

Sari is studying four different samples of materials. This table shows the mass and volume of the samples.

Revolt · Accepted Answer

X

Question 5

Julie takes a cold glass of clear, colorless liquid out of the refrigerator and puts it on the table. As the liquid warms up to room temperature, Julie sees bubbles of gas form in the liquid and rise to the surface.Which conclusion is best supported by Julie’s observations?

Revolt · Accepted Answer

The liquid is a mixture because it has a gas dissolved in a liquid.

Mixtures — Unit test Answers

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