Textbook Question
(a) When chlorine atoms react with atmospheric ozone, what are the products of the reaction?
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Ch.18 - Chemistry of the Environment
Chapter 18, Problem 31a
(a) Write a chemical equation that describes the attack of acid rain on limestone, CaCO3.
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Identify the main components involved in the reaction: acid rain, which primarily contains sulfuric acid (H2SO4), and limestone, which is composed of calcium carbonate (CaCO3).
Understand that the reaction between sulfuric acid and calcium carbonate is a type of acid-carbonate reaction, which typically produces a salt, water, and carbon dioxide gas.
Write the balanced chemical equation for the reaction: Start by writing the reactants on the left side of the equation: CaCO3 (s) + H2SO4 (aq).
Determine the products of the reaction: The reaction will produce calcium sulfate (CaSO4), water (H2O), and carbon dioxide (CO2).
Write the complete balanced chemical equation: CaCO3 (s) + H2SO4 (aq) → CaSO4 (s) + H2O (l) + CO2 (g). Ensure that the equation is balanced in terms of both mass and charge.
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Related Practice
Textbook Question
(b) Based on average bond enthalpies, would you expect a photon capable of dissociating a C-Cl bond to have sufficient energy to dissociate a C-Br bond?
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Open Question
Nitrogen oxides like NO2 and NO are a significant source of acid rain. For each of these molecules, write an equation that shows how an acid is formed from the reaction with water.
Textbook Question
(b) If a limestone sculpture were treated to form a surface layer of calcium sulfate, would this help to slow down the effects of acid rain? Explain.
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Open Question
The first stage in corrosion of iron upon exposure to air is oxidation to Fe2+. (a) Write a balanced chemical equation to show the reaction of iron with oxygen and protons from acid rain. (b) Would you expect the same sort of reaction to occur with a silver surface? Explain.
Textbook Question
Alcohol-based fuels for automobiles lead to the production of formaldehyde (CH2O) in exhaust gases. Formaldehyde undergoes photodissociation, which contributes to photo- chemical smog: CH2O + hn ¡ CHO + H The maximum wavelength of light that can cause this reaction is 335 nm. (b) What is the maximum strength of a bond, in kJ/mol, that can be broken by absorption of a photon of 335-nm light?
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