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Chapter 18: Problem 74

Write balanced chemical equations for each of the following reactions: (a) The carbon dioxide molecule undergoes photodissociation in the upper atmosphere. (b) The carbon dioxide molecule undergoes photoionization in the upper atmosphere. (c) Carbon monoxide undergoes oxidation by ozone in the stratosphere. (d) Carbon dioxide dissolves in water to form hydrogen carbonate.

Short Answer

Expert verified
(a) \(CO_2 + hv \rightarrow CO + O\) (b) \(CO_2 + hv \rightarrow CO_2^+ + e^-\) (c) \(CO + O_3 \rightarrow CO_2 + O_2\) (d) \(CO_2 + H_2O \rightarrow HCO_3^-\)

Step by step solution

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1. Photodissociation of carbon dioxide

When carbon dioxide undergoes photodissociation, it absorbs a photon and breaks down into carbon monoxide (CO) and an oxygen atom (O). The balanced chemical equation for this reaction is: \[CO_2 + hv \rightarrow CO + O\]
02

2. Photoionization of carbon dioxide

When carbon dioxide undergoes photoionization, it absorbs a photon and loses an electron, resulting in the formation of a positive ion (CO2+). The balanced chemical equation for this reaction is: \[CO_2 + hv \rightarrow CO_2^+ + e^-\]
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3. Oxidation of carbon monoxide by ozone

In the stratosphere, carbon monoxide can react with ozone (O3) resulting in the formation of carbon dioxide (CO2) and molecular oxygen (O2). The balanced chemical equation for this reaction is: \[CO + O_3 \rightarrow CO_2 + O_2\]
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4. Carbon dioxide dissolving in water to form hydrogen carbonate

When carbon dioxide dissolves in water, it forms hydrogen carbonate (HCO3-) by reacting with water molecules. The balanced chemical equation for this reaction is: \[CO_2 + H_2O \rightarrow HCO_3^-\]

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Most popular questions from this chapter

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