Question 1

Which of the following compounds is a strong electrolyte when dissolved in water?

Accepted Answer

NaCl (sodium chloride)

Question 2

Which of the following is the correct net ionic equation for the reaction between HCl (aq) and KOH (aq)?

Accepted Answer

$$\mathrm{H^+} (aq) + \mathrm{OH^-} (aq) \rightarrow \mathrm{H_2O} (l)$$

Question 3

Which of the following salts will form a precipitate when mixed with a solution of Pb(NO3)2 (aq)?

Accepted Answer

KBr (aq)

Question 4

Which of the following is a correct balanced molecular equation for the combustion of octane ($$\mathrm{C_8H_{18}}$$)?

Accepted Answer

$$2\mathrm{C_8H_{18}} (l) + 25 \mathrm{O_2$} (g) \rightarrow 16 \mathrm{CO_2$} (g) + 18 \mathrm{H_2O} (g)$$

Question 5

Which of the following statements about solubility rules is CORRECT?

Accepted Answer

All nitrates are soluble in water

Question 6

Which of the following is the correct net ionic equation for the reaction between (NH4)2CO3 (aq) and CaCl2 (aq)?

Accepted Answer

$$\mathrm{CO_3$^{2-}} (aq) + \mathrm{Ca$$^{2+}$$} (aq) \rightarrow \mathrm{$$CaCO_3$$} (s)$$

Question 7

Which of the following is a weak electrolyte in aqueous solution?

Accepted Answer

CH3COOH (acetic acid)

Question 8

A solution of Ba(NO3)2 (aq) is mixed with a solution of Na2SO4 (aq). What is the net ionic equation for the reaction that occurs?

Accepted Answer

$$\mathrm{Ba$$^{2+}$$} (aq) + \mathrm{SO_4$^{2-}} (aq) \rightarrow \mathrm{$$BaSO_4$$} (s)$$

Question 9

Which of the following best describes the role of water in the reaction $$\mathrm{$$HNO_3$$} (aq) + \mathrm{H_2O} (l) \rightarrow \mathrm{H_3O^+} (aq) + \mathrm{NO_3$^-} (aq)$$ according to the Brønsted-Lowry definition?

Accepted Answer

Water acts as a Brønsted base

Question 10

Which of the following is a correct net ionic equation for the neutralization of a weak acid (HF) with a strong base (LiOH)?

Accepted Answer

$$\mathrm{HF} (aq) + \mathrm{OH^-} (aq) \rightarrow \mathrm{F^-} (aq) + \mathrm{H_2O} (l)$$

Question 11

Which of the following compounds is insoluble in water according to the solubility rules?

Accepted Answer

BaSO4

Question 12

Which of the following is a triprotic acid?

Accepted Answer

H3PO4

Question 13

Which of the following is the correct net ionic equation for the reaction between HNO2 (aq) and RbOH (aq)?

Accepted Answer

$$\mathrm{$$HNO_2$$} (aq) + \mathrm{OH^-} (aq) \rightarrow \mathrm{NO_2$^-} (aq) + \mathrm{H_2O} (l)$$

Question 14

Which of the following best explains why a solution of sugar in water does not conduct electricity?

Accepted Answer

Sugar is a nonelectrolyte and does not form ions in solution

Question 15

Which of the following reactions is a precipitation reaction?

Accepted Answer

$$\mathrm{$$AgNO_3$$} (aq) + \mathrm{HCl} (aq) \rightarrow \mathrm{AgCl} (s) + \mathrm{H_3O^+} (aq) + \mathrm{NO_3$^-} (aq)$$

Question 16

Which of the following is a property of bases according to the Arrhenius definition?

Accepted Answer

They produce OH- ions in water

Question 17

Which of the following is a correct balanced molecular equation for the reaction between MgCl2 (aq) and AgNO3 (aq)?

Accepted Answer

$$\mathrm{$$MgCl_2$$} (aq) + 2 \mathrm{$$AgNO_3$$} (aq) \rightarrow \mathrm{Mg(NO_3$)_2} (aq) + 2 \mathrm{AgCl} (s)$$

Stoichiometry of Chemical Reactions: Aqueous Solutions, Electrolytes, and Acid-Base Chemistry

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