Q: Which of the following is the correct formula for calculating molarity?

$$\mathrm{Molarity} = \dfrac{\text{moles of solute}}{\text{volume of solution in liters}}$$

Question 1

Which of the following statements best describes a strong electrolyte in aqueous solution?

Accepted Answer

It completely dissociates into ions in water.

Question 2

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

Accepted Answer

CH3OH

Question 3

A solution is prepared by dissolving 0.5 mol of NaCl in enough water to make 1.0 L of solution. What is the molarity of the solution?

Accepted Answer

$$0.5\ \mathrm{M}$$

Question 4

Which of the following reactions is a precipitation reaction?

Accepted Answer

$$\mathrm{AgNO}_3(aq) + \mathrm{NaCl}(aq) \rightarrow \mathrm{AgCl}(s) + \mathrm{NaNO}_3(aq)$$

Question 5

Which of the following is the correct net ionic equation for the reaction between Pb(NO$$_3$$)$$_2(aq) $$and KI(aq)?

Accepted Answer

$$\mathrm{Pb}^{2+}(aq) + 2\mathrm{I}^-(aq) \rightarrow \mathrm{PbI}_2(s)$$

Question 6

Which of the following is a weak electrolyte?

Accepted Answer

CH$$_3$$COOH

Question 7

What is the oxidation number of sulfur in H$$_2SO$_4$$?

Accepted Answer

$$+6$$

Question 8

Which of the following metals will NOT react with hydrochloric acid to produce hydrogen gas, based on the activity series?

Accepted Answer

Copper

Question 9

A student wants to prepare 250 mL of a 0.100 M NaCl solution from a 1.00 M NaCl stock solution. What volume of the stock solution should be used?

Accepted Answer

$$25.0\ \mathrm{mL}$$

Question 10

Which of the following best describes a neutralization reaction?

Accepted Answer

A reaction in which an acid and a base react to form water and a salt.

Question 11

Which of the following is the correct balanced molecular equation for the reaction of sodium carbonate with hydrochloric acid?

Accepted Answer

$$\mathrm{Na}_2\mathrm{CO}_3(aq) + 2\mathrm{HCl}(aq) \rightarrow 2\mathrm{NaCl}(aq) + \mathrm{CO}_2(g) + \mathrm{H}_2\mathrm{O}(l)$$

Question 12

Which of the following statements about acids and bases is correct?

Accepted Answer

Acids are proton donors and bases are proton acceptors.

Question 13

A titration is performed using 0.100 M HCl and 25.0 mL of NaOH. If 30.0 mL of HCl is required to reach the equivalence point, what is the concentration of the NaOH solution?

Accepted Answer

$$0.0833\ \mathrm{M}$$

Question 14

Which of the following is a correct statement about the solubility of ionic compounds?

Accepted Answer

Solubility rules are used to predict whether an ionic compound will dissolve in water.

Question 15

Which of the following is the correct formula for calculating molarity?

Accepted Answer

$$\mathrm{Molarity} = \dfrac{	ext{moles of solute}}{	ext{volume of solution in liters}}$$

Question 16

Which of the following is a correct 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 17

Which of the following best describes the role of a spectator ion in a chemical reaction?

Accepted Answer

It remains unchanged and does not participate in the reaction.

Question 18

Which of the following antacids contains both magnesium hydroxide and calcium carbonate as acid-neutralizing agents?

Accepted Answer

Rolaids

Question 19

Which of the following statements about oxidation-reduction (redox) reactions is correct?

Accepted Answer

Oxidation and reduction always occur together.

Chapter 4: Reactions in Aqueous Solution – General Chemistry Study Notes

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