Q: Which of the following statements best describes what happens when an ionic compound, such as NaCl, dissolves in water?

NaCl dissociates into Na\textsuperscript{+} and Cl\textsuperscript{-} ions, which are surrounded by water molecules.

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

$$\text{Molarity} = \dfrac{\text{moles of solute}}{\text{volume of solution (L)}}$$

Q: Which of the following is the correct net ionic equation for the reaction between aqueous solutions of silver nitrate and sodium chloride?

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

Q: Which of the following is the correct balanced molecular equation for the reaction between hydrochloric acid and sodium hydroxide?

$$\text{HCl} (aq) + \text{NaOH} (aq) \rightarrow \text{NaCl} (aq) + \text{H}_2\text{O} (l)$$

Q: Which of the following is a correct example of a double displacement (precipitation) reaction?

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

Q: What is the net ionic equation for the reaction between acetic acid (CH$$_3$$COOH) and sodium hydroxide (NaOH)?

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

Question 1

Which of the following statements best describes what happens when an ionic compound, such as NaCl, dissolves in water?

Accepted Answer

NaCl dissociates into Na	extsuperscript{+} and Cl	extsuperscript{-} ions, which are surrounded by water molecules.

Question 2

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

Accepted Answer

$$	ext{Molarity} = \dfrac{	ext{moles of solute}}{	ext{volume of solution (L)}}$$

Question 3

A student prepares 250.0 mL of a 0.200 M NaCl solution. How many moles of NaCl are present in the solution?

Accepted Answer

$$0.0500$$ moles

Question 4

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

Accepted Answer

Sodium nitrate (NaNO$$_3)$$

Question 5

Which of the following is a strong electrolyte?

Accepted Answer

Sodium hydroxide (NaOH)

Question 6

A solution is prepared by diluting 50.0 mL of 2.00 M HCl to a final volume of 250.0 mL. What is the final concentration of HCl?

Accepted Answer

$$0.40 M$$

Question 7

Which of the following is the correct net ionic equation for the reaction between aqueous solutions of silver nitrate and sodium chloride?

Accepted Answer

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

Question 8

Which of the following acids is classified as a strong acid?

Accepted Answer

Hydrochloric acid (HCl)

Question 9

What is the oxidation state of sulfur in sulfate ion (SO$$_4$$^{2-}$$)?

Accepted Answer

$$+6$$

Question 10

Which of the following statements correctly describes the role of the oxidizing agent in a redox reaction?

Accepted Answer

It gains electrons and is reduced.

Question 11

A student mixes 100.0 mL of 0.150 M iron(II) nitrate with 200.0 mL of 0.100 M sodium sulfate. What mass of iron(II) sulfate (FeSO$$_4) $$will precipitate, assuming complete reaction and that FeSO$$_4 is $$insoluble?

Accepted Answer

$$2.64 g$$

Question 12

Which of the following is the correct balanced molecular equation for the reaction between hydrochloric acid and sodium hydroxide?

Accepted Answer

$$	ext{HCl} (aq) + 	ext{NaOH} (aq) ightarrow 	ext{NaCl} (aq) + 	ext{H}_2	ext{O} (l)$$

Question 13

During an acid-base titration, 25.00 mL of 0.100 M NaOH is required to neutralize 20.00 mL of an unknown HCl solution. What is the concentration of the HCl solution?

Accepted Answer

$$0.125 M$$

Question 14

Which of the following is a correct example of a double displacement (precipitation) reaction?

Accepted Answer

$$	ext{Na}_2	ext{SO}_4 (aq) + 	ext{BaCl}_2 (aq) ightarrow 	ext{BaSO}_4 (s) + 2	ext{NaCl} (aq)$$

Question 15

Which of the following best describes a weak electrolyte?

Accepted Answer

A substance that partially dissociates into ions in water.

Question 16

What is the net ionic equation for the reaction between acetic acid (CH$$_3$$COOH) and sodium hydroxide (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 17

Which of the following is the correct oxidation state for chlorine in perchlorate ion (ClO$$_4^-$$)?

Accepted Answer

$$+7$$

Question 18

A sample of sodium oxalate (Na$$_2C$_2O$_4) $$weighing 0.960 g is titrated with 35.62 mL of 0.0400 M KMnO$$_4. $$What is the percentage by mass of Na$$_2C$_2O$_4 in $$the sample? (Use the balanced equation: $$2	ext{MnO}_4^- + 5	ext{C}_2	ext{O}_4$$^{2-}$$ + 16	ext{H}^+ ightarrow 2	ext{Mn}^{2+} + 10	ext{CO}_2 + 8	ext{H}_2	ext{O})$$

Accepted Answer

$$95.0\%$$

Question 19

Which of the following best describes the equivalence point in an acid-base titration?

Accepted Answer

The point at which the number of moles of acid equals the number of moles of base.

Reactions in Aqueous Solutions: General Chemistry Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드