A base is a substance that accepts a proton, resulting in the formation of OH- ions. Phenolphthalein indicator is commonly used to detect the presence of a base in a solution, as it changes from colorless to pink as the pH of the solution rises above 8.3, indicating the presence of OH- ions.

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A Base

Question 32

Multiple Choice

A base

A) causes phenolphthalein indicator to change from colorless to pink.
B) donates a proton in a proton transfer reaction.
C) accepts electrons in an electron transfer reaction.
D) produces hydrogen ions in solution.
E) does none of these choices.

Correct Answer: