Question 1

Which of the following equations is correctly balanced?

Accepted Answer

$$4\,\mathrm{Fe} + 3\,\mathrm{O}_2 \rightarrow 2\,\mathrm{Fe}_2\mathrm{O}_3$$

Question 2

Which of the following compounds is a weak electrolyte in water?

Accepted Answer

CH$$_3$$COOH

Question 3

According to the solubility rules, which of the following compounds is insoluble in water?

Accepted Answer

BaCO$$_3$$

Question 4

What is the net ionic equation for the reaction between NaCl(aq) and AgNO$$_3(aq$$)?

Accepted Answer

$$\mathrm{Ag}^+ (aq) + \mathrm{Cl}^- (aq) \rightarrow \mathrm{AgCl} (s)$$

Question 5

A solution is prepared by dissolving 0.50 mol NaCl in 250 mL of water. What is the molarity of the solution?

Accepted Answer

$$2.0\,\mathrm{M}$$

Question 6

How many grams of NaOH are needed to make 0.75 L of a 0.40 M solution? (Molar mass NaOH = 40.00 g/mol)

Accepted Answer

$$12.0\,\mathrm{g}$$

Question 7

Which of the following pairs will produce a precipitate when mixed?

Accepted Answer

Na$$_2CO$_3$$ and CaCl$$_2$$

Question 8

What is the limiting reactant when 10.0 mol N$$_2$$ reacts with 15.0 mol H$$_2 to $$form NH$$_3$$? (N$$_2 + 3H$_2$$ → 2NH$$_3)$$

Accepted Answer

H$$_2$$

Question 9

Which of the following is a decomposition reaction?

Accepted Answer

$$\mathrm{CaCO}_3 \rightarrow \mathrm{CaO} + \mathrm{CO}_2$$

Question 10

Which of the following is a strong acid?

Accepted Answer

HCl

Question 11

How many grams of BaSO$$_4$$ will form when 100.0 mL of 0.50 M BaCl$$_2$$ reacts with excess Na$$_2SO$_4$$? (Molar mass BaSO$$_4 = 233.4 g/$$mol)

Accepted Answer

$$11.7\,\mathrm{g}$$

Question 12

Which of the following is a weak base?

Accepted Answer

NH$$_3$$

Question 13

Which of the following compounds is a non-electrolyte?

Accepted Answer

C$$_6H$_{12}O$_6$$

Question 14

What is the net ionic equation for the neutralization of HCl with NaOH?

Accepted Answer

$$\mathrm{H}^+ (aq) + \mathrm{OH}^- (aq) \rightarrow \mathrm{H}_2\mathrm{O} (l)$$

Question 15

Which of the following is the correct molecular equation for the reaction between BaCl$$_2$$ and Na$$_2SO$_4$$?

Accepted Answer

$$\mathrm{BaCl}_2 (aq) + \mathrm{Na}_2\mathrm{SO}_4 (aq) \rightarrow 2\mathrm{NaCl} (aq) + \mathrm{BaSO}_4 (s)$$

Question 16

Which of the following best describes the behavior of sodium chloride (NaCl) in water?

Accepted Answer

It fully dissociates into Na$$^+$$ and Cl$$^-$$ ions.

Question 17

Which of the following is the correct net ionic equation for the precipitation reaction between AgNO$$_3$$ and KBr?

Accepted Answer

$$\mathrm{Ag}^+ (aq) + \mathrm{Br}^- (aq) \rightarrow \mathrm{AgBr} (s)$$

Question 18

A student mixes 100.0 mL of 0.50 M AgNO$$_3$$ with 100.0 mL of 0.30 M NaCl. What is the limiting reactant?

Accepted Answer

NaCl

Question 19

Which of the following best describes the solubility of PbI$$_2 in $$water?

Accepted Answer

Insoluble, with no exceptions

General Chemistry Study Guide: Electrolytes, Solubility, Precipitation, Molarity, Stoichiometry, and Limiting Reactants

Study Guide - Practice Questions