Question 1

Which of the following best describes a solution?

Accepted Answer

A homogeneous mixture of two or more substances

Question 2

In a solution made by dissolving 10 g of salt in 100 mL of water, which is the solute?

Accepted Answer

Salt

Question 3

Which of the following combinations will NOT form a solution according to the 'like dissolves like' rule?

Accepted Answer

Polar solute and nonpolar solvent

Question 4

What happens when NaCl is added to water?

Accepted Answer

Na+ ions are attracted to the oxygen atoms of water, and Cl− ions are attracted to the hydrogen atoms.

Question 5

Which of the following solutes will dissolve in water?

Accepted Answer

Na2SO4

Question 6

Which of the following is a strong electrolyte?

Accepted Answer

NaCl

Question 7

How many equivalents are present in 1 mole of Fe3+?

Accepted Answer

3 Eq

Question 8

A patient’s blood calcium level is 8.8 mEq/L. How many moles of Ca2+ are in 0.50 L of blood? Use the conversion $$1 	ext{ Eq Ca}^{2+} = 0.5 	ext{ mol Ca}^{2+}.$$

Accepted Answer

$$0.0022$$ moles

Question 9

Which of the following best describes a saturated solution?

Accepted Answer

A solution that contains the maximum amount of dissolved solute at a given temperature

Question 10

At 40°C, the solubility of KBr is 80 g/100 g H2O. Which of the following is a saturated solution?

Accepted Answer

80 g KBr/100 g H2O

Question 11

Which of the following statements about the effect of temperature on solubility is correct?

Accepted Answer

The solubility of most solids in water increases as temperature increases.

Question 12

According to Henry’s Law, what happens to the solubility of a gas in a liquid as the pressure of the gas above the liquid increases?

Accepted Answer

The solubility increases.

Question 13

Which of the following ionic compounds is insoluble in water?

Accepted Answer

PbI2

Question 14

Calculate the mass percent (% m/m) of Na2CO3 in a solution prepared by mixing 15.0 g of Na2CO3 and 235 g of H2O.

Accepted Answer

6.00%

Question 15

Which of the following best describes an isotonic solution with respect to red blood cells?

Accepted Answer

It has the same solute concentration as the cells.

Question 16

What will happen to a red blood cell placed in a 2% NaCl solution?

Accepted Answer

It will undergo crenation.

Question 17

Which of the following is a property of a colloid?

Accepted Answer

Particles do not settle out and cannot be separated by filtration.

Question 18

Which of the following best describes dialysis?

Accepted Answer

Both solvent and small solute particles pass through the membrane, but large particles are retained.

Question 19

A solution is prepared by mixing 20 mL of ethanol with enough water to make 100 mL of solution. What is the volume percent (% v/v) of ethanol?

Accepted Answer

20%

Chapter 9: Solutions – GOB Chemistry Study Notes

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