객관식
Which of the following is a characteristic property of bases?
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2. Water
Acids and Bases
객관식
Which of the following acids occurs naturally in the human body and plays an important regulatory role?
A
Nitric acid (\(\mathrm{HNO_3}\))
B
Sulfuric acid (\(\mathrm{H_2SO_4}\))
C
Carbonic acid (\(\mathrm{H_2CO_3}\))
D
Hydrochloric acid (\(\mathrm{HCl}\))
검증된 단계별 안내1
Step 1: Begin by identifying the acids listed in the problem and their chemical formulas: Nitric acid (\(\mathrm{HNO_3}\)), Sulfuric acid (\(\mathrm{H_2SO_4}\)), Carbonic acid (\(\mathrm{H_2CO_3}\)), and Hydrochloric acid (\(\mathrm{HCl}\)).
Step 2: Recall the role of each acid in biological systems. Nitric acid (\(\mathrm{HNO_3}\)) and Sulfuric acid (\(\mathrm{H_2SO_4}\)) are strong acids but do not naturally occur in the human body in significant amounts or play regulatory roles.
Step 3: Consider Carbonic acid (\(\mathrm{H_2CO_3}\)). It is formed in the human body as part of the carbon dioxide (\(\mathrm{CO_2}\)) transport system. Carbonic acid plays a critical role in maintaining pH balance in the blood through the bicarbonate buffer system.
Step 4: Evaluate Hydrochloric acid (\(\mathrm{HCl}\)). It is secreted by the stomach lining and aids in digestion by creating an acidic environment, but its role is more localized to digestion rather than broad regulatory functions.
Step 5: Conclude that Carbonic acid (\(\mathrm{H_2CO_3}\)) is the correct answer because it naturally occurs in the human body and plays an important regulatory role in maintaining pH homeostasis.
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