Which statement about acids and litmus is true?

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Study for the IMAT Chemistry Exam. Access flashcards and multiple choice questions; hints and explanations included for each question. Prepare effectively for your exam.

Multiple Choice

Which statement about acids and litmus is true?

Explanation:
Litmus indicator reveals acidity by changing color with hydrogen ion activity. In acidic solutions, the blue form of litmus turns red; in basic solutions, red litmus turns blue. Therefore, acids turn blue litmus red. The other statements mix up the color changes or misstate pH behavior: acids are not neutral on the pH scale, and bases cause the opposite color change with litmus.

Litmus indicator reveals acidity by changing color with hydrogen ion activity. In acidic solutions, the blue form of litmus turns red; in basic solutions, red litmus turns blue. Therefore, acids turn blue litmus red. The other statements mix up the color changes or misstate pH behavior: acids are not neutral on the pH scale, and bases cause the opposite color change with litmus.

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