객관식
When silver tarnishes, which chemical reaction occurs on its surface?
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1. Intro to General Chemistry
Chemical Properties
객관식
Which of the following best describes the acidity of ginger ale?
A
Ginger ale is basic because ginger is a base.
B
Ginger ale is neither acidic nor basic; it is amphoteric.
C
Ginger ale is neutral because it contains equal amounts of acids and bases.
D
Ginger ale is acidic due to the presence of carbonic acid from carbonation.
검증된 단계별 안내1
Understand that acidity or basicity of a solution is determined by the presence of acidic or basic species that affect the pH.
Recognize that ginger ale is a carbonated beverage, meaning it contains dissolved carbon dioxide (CO\_2) under pressure.
Recall that when CO\_2 dissolves in water, it reacts to form carbonic acid (H\_2CO\_3), which is a weak acid:
\[ \mathrm{CO_2 + H_2O \rightleftharpoons H_2CO_3} \]
Since carbonic acid is present, it lowers the pH of the solution, making ginger ale acidic rather than neutral or basic.
Therefore, the best description is that ginger ale is acidic due to the presence of carbonic acid formed from carbonation.
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