Q: A student prepares 250 mL of a 0.200 M NaCl solution. How many grams of NaCl (molar mass = 58.44 g/mol) are required?

$$0.200 \times 0.250 = 0.050$$ mol; $$0.050 \times 58.44 = 2.92 g$$

Q: What is the net ionic equation for the reaction between aqueous solutions of Na$$_2CO$_3$$ and HCl?

$$\text{CO}_3$$^{2-}$$ (aq) + 2\text{H}^+ (aq) \rightarrow \text{H}_2\text{O} (l) + \text{CO}_2 (g)$$

Q: A 50.0 mL sample of 0.100 M H$$_2SO$_4 is $$titrated with 0.200 M NaOH. What volume of NaOH is required to reach the equivalence point?

$$V = \frac{0.100 \times 50.0 \times 2}{0.200} = 50.0 mL$$

Q: Which of the following is a correct net ionic equation for the reaction between aqueous solutions of Pb(NO$$_3$$)$$_2$$ and KI?

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

Q: Which of the following is a redox reaction?

$$\text{Zn} (s) + \text{CuSO}_4 (aq) \rightarrow \text{ZnSO}_4 (aq) + \text{Cu} (s)$$

Q: A 100.0 mL sample of 1.00 M HCl is titrated with 0.500 M NaOH. What volume of NaOH is needed to reach the equivalence point?

$$V = \frac{1.00 \times 100.0}{0.500} = 200.0 mL$$

Q: Which of the following is the correct net ionic equation for the neutralization of acetic acid (CH$$_3$$COOH) with NaOH?

$$\text{CH}_3\text{COOH} (aq) + \text{OH}^- (aq) \rightarrow \text{CH}_3\text{COO}^- (aq) + \text{H}_2\text{O} (l)$$

Q: Which of the following is the correct balanced half-reaction for the reduction of Ag$$^+ to Ag(s$$)?

$$\text{Ag}^+ (aq) + e^- \rightarrow \text{Ag} (s)$$

Question 1

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

Accepted Answer

It completely dissociates into ions and conducts electricity well.

Question 2

A student prepares 250 mL of a 0.200 M NaCl solution. How many grams of NaCl (molar mass = 58.44 g/mol) are required?

Accepted Answer

$$0.200 	imes 0.250 = 0.050$$ mol; $$0.050 	imes 58.44 = 2.92 g$$

Question 3

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

Accepted Answer

BaSO$$_4$$

Question 4

What is the net ionic equation for the reaction between aqueous solutions of Na$$_2CO$_3$$ and HCl?

Accepted Answer

$$	ext{CO}_3$$^{2-}$$ (aq) + 2	ext{H}^+ (aq) ightarrow 	ext{H}_2	ext{O} (l) + 	ext{CO}_2 (g)$$

Question 5

A 50.0 mL sample of 0.100 M H$$_2SO$_4 is $$titrated with 0.200 M NaOH. What volume of NaOH is required to reach the equivalence point?

Accepted Answer

$$V = \frac{0.100 	imes 50.0 	imes 2}{0.200} = 50.0 mL$$

Question 6

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

Accepted Answer

$$	ext{Pb}^{2+} (aq) + 2	ext{I}^- (aq) ightarrow 	ext{PbI}_2 (s)$$

Question 7

Which of the following species acts as a Brønsted-Lowry base in water?

Accepted Answer

NH$$_3$$

Question 8

What is the oxidation number of chromium in K$$_2Cr$_2O$_7$$?

Accepted Answer

+6

Question 9

Which of the following is a redox reaction?

Accepted Answer

$$	ext{Zn} (s) + 	ext{CuSO}_4 (aq) ightarrow 	ext{ZnSO}_4 (aq) + 	ext{Cu} (s)$$

Question 10

A 100.0 mL sample of 1.00 M HCl is titrated with 0.500 M NaOH. What volume of NaOH is needed to reach the equivalence point?

Accepted Answer

$$V = \frac{1.00 	imes 100.0}{0.500} = 200.0 mL$$

Question 11

Which of the following best describes the process of hydration?

Accepted Answer

The process in which an ion is surrounded by water molecules arranged in a specific manner.

Question 12

Which of the following is the correct net ionic equation for the neutralization of acetic acid (CH$$_3$$COOH) with NaOH?

Accepted Answer

$$	ext{CH}_3	ext{COOH} (aq) + 	ext{OH}^- (aq) ightarrow 	ext{CH}_3	ext{COO}^- (aq) + 	ext{H}_2	ext{O} (l)$$

Question 13

A solution is prepared by dissolving 0.50 mol of MgCl$$_2 in $$enough water to make 1.0 L of solution. What is the concentration of chloride ions?

Accepted Answer

$$1.0 M$$

Question 14

Which of the following is the correct balanced half-reaction for the reduction of Ag$$^+ to Ag(s$$)?

Accepted Answer

$$	ext{Ag}^+ (aq) + e^- ightarrow 	ext{Ag} (s)$$

Question 15

Which of the following is a weak electrolyte?

Accepted Answer

CH$$_3$$COOH

Question 16

A 25.0 mL sample of 0.200 M HNO$$_3 is $$titrated with 0.100 M NaOH. What volume of NaOH is required to reach the equivalence point?

Accepted Answer

$$V = \frac{0.200 	imes 25.0}{0.100} = 50.0 mL$$

Question 17

Which of the following is the correct oxidation number for sulfur in SO$$_4$$^{2-}$$?

Accepted Answer

+6

Question 18

Which of the following best describes a precipitation reaction?

Accepted Answer

A reaction in which an insoluble solid forms from the mixing of two solutions.

Question 19

Which of the following is the correct net ionic equation for the reaction between aqueous solutions of BaCl$$_2$$ and Na$$_2SO$_4$$?

Accepted Answer

$$	ext{Ba}^{2+} (aq) + 	ext{SO}_4$$^{2-}$$ (aq) ightarrow 	ext{BaSO}_4 (s)$$

Reactions in Aqueous Solutions: Electrolytes, Solution Stoichiometry, and Ionic Processes

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