A solution turns blue litmus paper red. What does this indicate about the ions present in the solution?
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A.
The solution contains no ions at all.
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B.
The solution contains equal amounts of H⁺ and OH⁻ ions.
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C.
The solution contains more H⁺ ions than OH⁻ ions.
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D.
The solution contains more OH⁻ ions than H⁺ ions.
Correct Answer:
C. The solution contains more H⁺ ions than OH⁻ ions.
Explanation:
When blue litmus paper turns red, it signifies that the substance is acidic. In an acidic solution, the concentration of hydrogen ions (H?) is greater than the concentration of hydroxide ions (OH?). This chemical imbalance is what causes the indicator to change color, distinguishing it from neutral solutions where the ions are equal or basic solutions where hydroxide ions predominate.
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