IS_Unit2_Checkpoint 2.4_E

Which of the following are the examples of substances that are soluble in water?

• A. Jelly powder and soil

• B. Table salt and corn flour

• C. Table salt and sugar

• D. Corn flour and rice

Which of the following are the examples of substances that are insoluble in water?

• A. Jelly powder and rice

• B. Corn flour and jelly powder

• C. Soil and sugar

• D. Soil and corn flour

Joe wants to investigate how the surface area of the solute affects the rate of dissolving.

His experimental results are shown in the following table.

(a) What is/are the solute(s)?

• A. Tap water

• B. Sugar

• C. Tap water and sugar

Tags

NGSS.MS-PS1-2

Joe wants to investigate how the surface area of the solute affects the rate of dissolving.

His experimental results are shown in the following table.

(b) What is/are the solvent(s)?

• A. Tap water

• B. Sugar

• C. Tap water and sugar

Tags

NGSS.MS-PS1-2

Joe wants to investigate how the surface area of the solute affects the rate of dissolving.

His experimental results are shown in the following table.

(c) Which crystal sugar dissolves faster?

• A. crushed pieces of crystal sugar

• B. whole crystal sugar

Tags

NGSS.MS-PS1-2

Joe wants to investigate how the surface area of the solute affects the rate of dissolving.

His experimental results are shown in the following table.

(d) During the experiment, the volume of water was kept constant. Why?

• A. To ensure the temperature of water is the same.

• B. To ensure the surface area of water is the same.

• C. To ensure the volume of solution is the same.

• D. To ensure the experiment is a fair test.

Tags

NGSS.MS-ETS1-1

Joe wants to investigate how the surface area of the solute affects the rate of dissolving.

His experimental results are shown in the following table.

(e) Apart from the surface area, which of the following are the other factors that affect the rate of dissolving?

(1) The rate of stirring

(2) The size of the beaker

(3) The temperature of the solvent

(4) The length of the glass rod

• A. (1) and (2) only

• B. (1) and (3) only

• C. (2) and (3) only

• D. (2) and (4) only