$$M = \frac{5.85\ \text{g}}{58.44\ \text{g/mol} \times 0.500\ \text{L}} = 0.200\ \text{M}$$

$$V_1$$ = \frac{$$M_2$$ $$V_2$$}{$$M_1$$} = \frac{0.100 \times 0.250}{1.00} = 0.025\ \text{L} = 25.0\ \text{mL}$$

$$\text{SO}_4$$^{2-}$$ (aq) + \text{Ba}^{2+} (aq) \rightarrow \text{BaSO}_4 (s)$$

$$M_{HI} = \frac{M_{LiOH} \times V_{LiOH}}{V_{HI}} = \frac{0.112 \times 22.48}{19.56} = 0.129\ \text{M}$$

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

Question 1

Which of the following best describes a solution in chemistry?

Accepted Answer

A homogeneous mixture of two or more substances.

Question 2

What is the molarity (M) of a solution prepared by dissolving 5.85 g of NaCl (molar mass = 58.44 g/mol) in enough water to make 0.500 L of solution?

Accepted Answer

$$M = \frac{5.85\ 	ext{g}}{58.44\ 	ext{g/mol} 	imes 0.500\ 	ext{L}} = 0.200\ 	ext{M}$$

Question 3

A laboratory technician needs to prepare 250 mL of 0.100 M HCl from a 1.00 M stock solution. What volume of the stock solution should be used?

Accepted Answer

$$V_1$$ = \frac{$$M_2$$ $$V_2$$}{$$M_1$$} = \frac{0.100 	imes 0.250}{1.00} = 0.025\ 	ext{L} = 25.0\ 	ext{mL}$$

Question 4

Which of the following statements about electrolytes is correct?

Accepted Answer

Strong electrolytes dissociate completely into ions in solution.

Question 5

Which compound will precipitate when solutions of AgNO$$_3$$ and NaCl are mixed?

Accepted Answer

AgCl (s)

Question 6

What is the net ionic equation for the reaction between aqueous solutions of K$$_2SO$_4$$ and BaI$$_2$$?

Accepted Answer

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

Question 7

Which of the following is a strong acid?

Accepted Answer

Hydrochloric acid, HCl

Question 8

A titration requires 22.48 mL of 0.112 M LiOH to neutralize 19.56 mL of HI solution. What is the concentration of the HI solution?

Accepted Answer

$$M_{HI} = \frac{M_{LiOH} 	imes V_{LiOH}}{V_{HI}} = \frac{0.112 	imes 22.48}{19.56} = 0.129\ 	ext{M}$$

Question 9

Which of the following best describes the role of water in an aqueous solution of NaCl?

Accepted Answer

Water acts as the solvent, surrounding and stabilizing the Na$$^+$$ and Cl$$^-$$ ions.

Question 10

Which of the following is the correct net ionic equation for the reaction of HCl (aq) with NaOH (aq)?

Accepted Answer

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

Question 11

Which of the following is true about oxidation and reduction?

Accepted Answer

Oxidation is the loss of electrons and reduction is the gain of electrons.

Question 12

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

Accepted Answer

$$+6$$

Question 13

Which of the following metals will react with Zn(NO$$_3$$)$$_2 (aq) to $$produce Zn (s), based on the activity series?

Accepted Answer

Mg (s)

Question 14

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

Accepted Answer

C$$_6H$_{12}O$_6 ($$glucose)

Question 15

Which of the following best describes a precipitation reaction?

Accepted Answer

A reaction in which a solid forms when two solutions are mixed.

Question 16

Which of the following is the correct molecular equation for the reaction between aqueous solutions of cesium chloride and calcium sulfide?

Accepted Answer

$$2	ext{CsCl} (aq) + 	ext{CaS} (aq) ightarrow 	ext{Cs}_2	ext{S} (aq) + 	ext{CaCl}_2 (aq)$$

Question 17

Which of the following is a polyprotic acid?

Accepted Answer

H$$_2SO$_4$$

Question 18

Which of the following is the correct complete ionic equation for the reaction between K$$_2SO$_4 (aq) $$and BaI$$_2 (aq$$)?

Accepted Answer

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

Chapter 5: Introduction to Solutions and Aqueous Reactions – General Chemistry Study Notes

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