You begin pouring sodium chloride into a glass of water. For a long time, the so

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You begin pouring sodium chloride into a glass of water. For a long time, the sodium chloride just dissolves in the water, but suddenly it begins to pile up at the bottom of the glass. Which statement is true?

Select one:

a. The water is unsaturated.

b. The sodium chloride has increased the temperature of the water.

c. The water is saturated.

d. The sodium chloride has decreased the temperature of the water.

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Imagine you have two beakers. Both beakers are filled with the same amount of water. The water in both beakers is the same temperature as well. You add 50 g of Substance A to the first beaker, and 50 g of Substance B to the second beaker. After stirring both beakers, there is a small pile of Substance A at the bottom of the first beaker. None of Substance B is visible in the second beaker. Which of the following statements is true?

Select one:

a. Substance A is more soluble in water than Substance B.

b. Substance A is less soluble in water than Substance B.

c. Substance B is not soluble in water.

d. Substance A is not soluble in water.

Comparing potassium nitrate (KNO3) and sodium chloride (NaCl), which chemical's solubility (in water) is most affected by change in temperature?

Select one:

a. impossible to tell

b. potassium nitrate

c. same variation

d. sodium chloride

Explanation / Answer

B Increase the temp b. Substance A is less soluble in water than Substance B b. potassium nitrate as there is thermodynamic rkn c c

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