Q: Which of the following best describes molarity ($$M) in $$terms of solution concentration?

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

Q: What is the balanced chemical equation for the reaction between sodium and chlorine to form table salt?

$$2\text{Na}(s) + \text{Cl}_2(g) \rightarrow 2\text{NaCl}(s)$$

Q: Which of the following is a strong acid?

Hydrochloric acid ($$\text{HCl})$$

Q: Which of the following is a strong base?

Sodium hydroxide ($$\text{NaOH})$$

Q: What is the net ionic equation for the neutralization of hydrochloric acid with sodium hydroxide?

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

Q: Which of the following reactions will produce a gas when a carbonate reacts with an acid?

$$\text{CaCO}_3(s) + 2\text{HCl}(aq) \rightarrow \text{CaCl}_2(aq) + \text{CO}_2(g) + \text{H}_2\text{O}(l)$$

Q: Which of the following is a weak electrolyte?

Acetic acid ($$\text{CH}_3\text{COOH})$$

Q: Which of the following reactions is a redox reaction?

$$2\text{H}_2(g) + \text{O}_2(g) \rightarrow 2\text{H}_2\text{O}(l)$$

Question 1

Which of the following best describes molarity ($$M) in $$terms of solution concentration?

Accepted Answer

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

Question 2

A student prepares 500 mL of a 0.2 M NaCl solution. How many grams of NaCl are required? ($$M_{	ext{NaCl}} = 58.44\ g/mol)$$

Accepted Answer

$$5.84\ g$$

Question 3

Which statement about sodium (Na) and chlorine (Cl) is correct based on their chemical properties?

Accepted Answer

Sodium reacts explosively with water, while chlorine is a toxic gas used as a chemical weapon.

Question 4

What is the balanced chemical equation for the reaction between sodium and chlorine to form table salt?

Accepted Answer

$$2	ext{Na}(s) + 	ext{Cl}_2(g) ightarrow 2	ext{NaCl}(s)$$

Question 5

Which of the following is a strong acid?

Accepted Answer

Hydrochloric acid ($$	ext{HCl})$$

Question 6

Which of the following is a strong base?

Accepted Answer

Sodium hydroxide ($$	ext{NaOH})$$

Question 7

What is the net ionic equation for the neutralization of hydrochloric acid with sodium hydroxide?

Accepted Answer

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

Question 8

Which of the following reactions will produce a gas when a carbonate reacts with an acid?

Accepted Answer

$$	ext{CaCO}_3(s) + 2	ext{HCl}(aq) ightarrow 	ext{CaCl}_2(aq) + 	ext{CO}_2(g) + 	ext{H}_2	ext{O}(l)$$

Question 9

Which statement about oxidation and reduction is correct?

Accepted Answer

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

Question 10

Assign the oxidation number to chlorine in $$	ext{ClO}_3^-.$$

Accepted Answer

$$+5$$

Question 11

Which of the following is the limiting reactant when 6 molecules of $$	ext{N}_2$$ and 6 molecules of $$	ext{H}_2$$ react to form ammonia ($$	ext{NH}_3) $$according to $$	ext{N}_2 + 3	ext{H}_2 ightarrow 2	ext{NH}_3$$?

Accepted Answer

$$	ext{H}_2$$

Question 12

Calculate the percent yield if 1.56 g of $$	ext{TiO}_2 is $$produced from a reaction where the theoretical yield is 1.60 g.

Accepted Answer

$$97.5\%$$

Question 13

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

Accepted Answer

Copper (Cu)

Question 14

What is the oxidation number of oxygen in hydrogen peroxide ($$	ext{H}_2	ext{O}_2$$)?

Accepted Answer

$$-1$$

Question 15

Which of the following is a weak electrolyte?

Accepted Answer

Acetic acid ($$	ext{CH}_3	ext{COOH})$$

Question 16

A solution is prepared by dissolving 10.0 g of $$	ext{KBr} ($$molar mass = 119.0 g/mol) in enough water to make 250 mL of solution. What is the molarity of the solution?

Accepted Answer

$$0.336\ M$$

Question 17

Which of the following reactions is a redox reaction?

Accepted Answer

$$2	ext{H}_2(g) + 	ext{O}_2(g) ightarrow 2	ext{H}_2	ext{O}(l)$$

Question 18

Which of the following best explains why strong acids are strong electrolytes?

Accepted Answer

They completely dissociate into ions in water.

Concentrations of Solutions, Types of Reactions, and Catalysis in General Chemistry

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