Writing and Balancing Chemical Equations

Question 1

Which of the following is the correct word equation for the reaction described below? Methanol (CH3OH) forms when carbon monoxide reacts with hydrogen.

Revolt · Accepted Answer

carbon monoxide + hydrogen → methanol

Question 2

Which of the following is the correct word equation for the reaction described below? Mercury(II) oxide breaks down when it is heated to form oxygen gas and liquid mercury.

Revolt · Accepted Answer

mercury(II) oxide → oxygen + mercury

Question 3

Which of the following is the correct word equation for the reaction described below? When sulfuric acid reacts with sodium hydroxide, sodium sulfate and water form.

Revolt · Accepted Answer

sulfuric acid + sodium hydroxide → sodium sulfate + water

Question 4

Which of the following is the correct word equation for the reaction described below? Calcium hydroxide and hydrogen gas are produced by the reaction of calcium hydride and water.

Revolt · Accepted Answer

calcium hydride + water → calcium hydroxide + hydrogen

Question 5

Identify the information that can be included in a chemical equation. Check all of the boxes that apply.

Revolt · Accepted Answer

the states of the reactants and products; the temperature and pressure at which the reaction was carried out; the relative amounts of reactants and products; the type of catalyst that is used to speed up the reaction; the possibility that the reaction can go in both directions

Question 6

Sulfur trioxide is a gas that reacts with liquid water to produce aqueous sulfuric acid, or acid rain. What is the equation for this reaction? Note: You do not need to balance the equation.

Revolt · Accepted Answer

SO3(g) + H2O(l) H2SO4(aq)

Question 7

Aqueous magnesium chloride and hydrogen gas are produced when solid magnesium reacts with aqueous hydrochloric acid (HCl). What is the equation for this reaction? Note: You do not need to balance the equation.

Revolt · Accepted Answer

Mg(s) + HCl(aq) MgCl2(aq) + H2(g)

Question 8

What element is the catalyst in the reaction above?

Revolt · Accepted Answer

Pt

Question 9

Barium chlorate (Ba(ClO3)2) breaks down to form barium chloride and oxygen. What is the balanced equation for this reaction?

Revolt · Accepted Answer

Ba(ClO3)2(s) BaCl2(s) + 3O2(g)

Question 10

Carbon dioxide and water are produced when pentane (C5H12) reacts with oxygen. What is the balanced equation for this reaction?

Revolt · Accepted Answer

C5H12(g) +8O2(g) 5CO2(g) + 6H2O(g)

Writing and Balancing Chemical Equations Answers

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