Q: Which of the following is the correctly balanced chemical equation, including phases, for the reaction of aluminum metal with aqueous hydrochloric acid to produce hydrogen gas and aluminum chloride?

$$2\text{Al}(s) + 6\text{HCl}(aq) \rightarrow 2\text{AlCl}_3(aq) + 3\text{H}_2(g)$$

Question 1

Which of the following is the correctly balanced chemical equation, including phases, for the reaction of aluminum metal with aqueous hydrochloric acid to produce hydrogen gas and aluminum chloride?

Accepted Answer

$$2	ext{Al}(s) + 6	ext{HCl}(aq) ightarrow 2	ext{AlCl}_3(aq) + 3	ext{H}_2(g)$$

Question 2

What type of chemical reaction occurs when aluminum metal reacts with hydrochloric acid?

Accepted Answer

Single displacement reaction

Question 3

If 5.4 g of aluminum metal ($$	ext{Al}) $$reacts completely with excess hydrochloric acid, how many liters of hydrogen gas ($$	ext{H}_2) at $$STP are produced? (Molar mass of Al = 27.0 g/mol; 1 mol gas at STP = 22.4 L)

Accepted Answer

$$4.48 L$$

Question 4

Which species is oxidized in the reaction between aluminum and hydrochloric acid?

Accepted Answer

Aluminum ($$	ext{Al})$$

Question 5

What is the oxidation state of aluminum in aluminum chloride ($$	ext{AlCl}_3$$)?

Accepted Answer

$$+3$$

Question 6

If 0.50 mol of aluminum reacts with excess hydrochloric acid, how many moles of hydrogen gas are produced?

Accepted Answer

$$0.75$$ mol

Question 7

Which of the following best explains why hydrogen gas is produced when aluminum reacts with hydrochloric acid?

Accepted Answer

Aluminum displaces hydrogen from hydrochloric acid due to its higher reactivity.

Question 8

In the reaction $$2	ext{Al}(s) + 6	ext{HCl}(aq) ightarrow 2	ext{AlCl}_3(aq) + 3	ext{H}_2(g)$$, what is the mole ratio of hydrochloric acid to aluminum?

Accepted Answer

$$6:2$$

Question 9

A student adds 1.0 mol of aluminum to 3.0 mol of hydrochloric acid. Which reactant is the limiting reagent?

Accepted Answer

Hydrochloric acid

Question 10

Which of the following statements is true regarding the phases of the products in the reaction between aluminum and hydrochloric acid?

Accepted Answer

Aluminum chloride is aqueous and hydrogen is a gas.

Question 11

If 0.10 mol of hydrogen gas is collected from the reaction of aluminum with hydrochloric acid, how many grams of aluminum were used? (Molar mass of Al = 27.0 g/mol)

Accepted Answer

$$1.8 g$$

Question 12

Which of the following best describes the role of hydrochloric acid in the reaction with aluminum?

Accepted Answer

It acts as an oxidizing agent.

Question 13

What is the total number of electrons transferred per formula unit in the reaction between aluminum and hydrochloric acid?

Accepted Answer

$$6$$

Question 14

Which of the following is a real-world application of the reaction between aluminum and hydrochloric acid?

Accepted Answer

Production of hydrogen gas for laboratory use

Question 15

If 0.25 mol of aluminum reacts with excess hydrochloric acid, how many moles of aluminum chloride are formed?

Accepted Answer

$$0.25$$ mol

Chemical Reactions: Aluminum and Hydrochloric Acid

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