$$M = \frac{\text{moles of solute}}{\text{liters of solution}}$$

Question 1

Which of the following best describes a solution in chemistry?

Accepted Answer

A homogeneous mixture of two substances

Question 2

What is the correct formula for calculating molarity ($$M) of a $$solution?

Accepted Answer

$$M = \frac{	ext{moles of solute}}{	ext{liters of solution}}$$

Question 3

A student wants to prepare 1.00 L of 1.00 M NaCl solution. Which procedure is correct?

Accepted Answer

Add 1.00 mol NaCl to a volumetric flask, add water to dissolve, then fill to 1.00 L mark

Question 4

If you dilute a stock solution, which equation relates the concentrations and volumes before and after dilution?

Accepted Answer

$$M_1V_1 = M_2V_2$$

Question 5

What volume of 0.125 M NaOH solution contains 0.255 mol of NaOH?

Accepted Answer

$$2.04\ 	ext{L}$$

Question 6

Which of the following is a strong electrolyte?

Accepted Answer

NaCl

Question 7

Which compound will conduct electricity when dissolved in water?

Accepted Answer

NaCl

Question 8

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

Accepted Answer

$$OH^- (aq) + H^+ (aq) \rightarrow H_2O (l)$$

Question 9

Which of the following acids is diprotic?

Accepted Answer

H$$_2SO$_4$$

Question 10

A 10.0 mL sample of 0.20 M HBr is titrated with 0.10 M NaOH. What volume of NaOH is required to reach the equivalence point?

Accepted Answer

$$20.0\ 	ext{mL}$$

Question 11

Which of the following best describes a precipitation reaction?

Accepted Answer

A reaction where a solid forms from two aqueous solutions

Question 12

Which compound is insoluble in water according to the solubility rules?

Accepted Answer

BaSO$$_4$$

Question 13

What is the oxidation state of oxygen in CO$$_2$$?

Accepted Answer

$$-2$$

Question 14

In the reaction $$4Fe (s) + 3O_2 (g) \rightarrow 2Fe_2O_3 (s)$$, which element is oxidized?

Accepted Answer

Iron

Question 15

Which of the following is a correct net ionic equation for a redox reaction?

Accepted Answer

$$Cu (s) + 2Ag^+ (aq) \rightarrow 2Ag (s) + Cu$$^{2+}$$ (aq)$$

Question 16

Which of the following is a nonelectrolyte?

Accepted Answer

C$$_{12}H$_{22}O$_{11}$$

Question 17

What is the correct balanced equation for the gas-evolution reaction between H$$_2SO$_4$$ and Li$$_2S$$?

Accepted Answer

$$H_2SO_4 (aq) + Li_2S (aq) \rightarrow Li_2SO_4 (aq) + H_2S (g)$$

Question 18

Which of the following is true about spectator ions?

Accepted Answer

They appear unchanged on both sides of the reaction arrow

Question 19

Which of the following is the correct net ionic equation for the neutralization of HCl and NaOH?

Accepted Answer

$$H^+ (aq) + OH^- (aq) \rightarrow H_2O (l)$$

Solutions and Aqueous Reactions: Concentration, Stoichiometry, and Types of Reactions

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