Question 1

Which of the following best describes a solution that contains the maximum amount of solute that can dissolve at a given temperature?

Accepted Answer

A saturated solution

Question 2

Which of the following compounds would you expect to be a strong electrolyte when dissolved in water?

Accepted Answer

NaCl

Question 3

A solution is prepared by dissolving 5.00 g of NaCl (molar mass = 58.44 g/mol) in enough water to make 250.0 mL of solution. What is the molarity of the solution?

$$	ext{Molarity} = \frac{	ext{moles of solute}}{	ext{liters of solution}}$$

Accepted Answer

0.342 M

Question 4

Which of the following best describes a colloid?

Accepted Answer

A mixture with particles that are intermediate in size between those in solutions and suspensions

Question 5

Which of the following solutions will have the highest osmotic pressure at 25°C, assuming equal concentrations (0.10 M) of each solute?

$$\Pi = iMRT$$

Accepted Answer

Na\_2SO\_4

Question 6

Which of the following statements about chemical equilibrium is correct?

Accepted Answer

The rates of the forward and reverse reactions are equal

Question 7

If the concentration of $$[H_3O^+] in a $$solution is $$1 	imes 10$$^{-5}$$ M, what is the pH of the solution?

pH$$ = -\log [H_3O^+]$$

Accepted Answer

5.0

Question 8

Which of the following is an example of a buffer system?

Accepted Answer

A mixture of acetic acid and sodium acetate

Question 9

Which of the following organic compounds is an alkene?

Accepted Answer

C\_2H\_4

Question 10

Which of the following best describes the process of dissociation?

Accepted Answer

The separation of an ionic compound into its ions when dissolved in water

Question 11

A solution has $$[OH^-] = 1 	imes 10$$^{-3}$$ M. What is the pOH and pH of the solution?

$$pOH = -\log [OH^-]$$

pH + $$pOH = 14$$

Accepted Answer

pOH = 3, pH = 11

Question 12

Which of the following is the correct condensed structural formula for butane?

Accepted Answer

CH\_3CH\_2CH\_2CH\_3

Question 13

Which of the following reactions is a neutralization reaction?

Accepted Answer

$$\mathrm{HCl} + \mathrm{NaOH} \rightarrow \mathrm{NaCl} + \mathrm{H_2O}$$

Question 14

Which of the following best describes an unsaturated solution?

Accepted Answer

A solution that can dissolve more solute at a given temperature

Question 15

Which of the following is the correct general formula for alkanes?

Accepted Answer

$$C_nH_{2n+2}$$

Question 16

A patient receives an intravenous solution that is hypotonic relative to their blood plasma. What is the most likely effect on their red blood cells?

Accepted Answer

The cells will swell and may burst due to water entering the cells

Question 17

Which of the following is an example of oxidation?

Accepted Answer

A metal atom loses electrons

Question 18

Which of the following best describes a strong acid?

Accepted Answer

An acid that completely ionizes in water

Question 19

Which of the following is the correct Lewis structure for ethyne (acetylene)?

Accepted Answer

H–C≡C–H

Question 20

A buffer solution is made by mixing 0.10 M acetic acid ($$CH_3COOH) $$and 0.10 M sodium acetate ($$CH_3COONa). If a $$small amount of HCl is added, what will happen to the pH of the solution?

Accepted Answer

The pH will decrease slightly but remain nearly constant

GOB Chemistry Exam 3 Study Guide: Solutions, Acids & Bases, and Introduction to Organic Chemistry

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