Responses
The substance with the higher pH has 1,000 times as many hydrogen ions per volume of water.
The substance with the higher pH has 1,000 times as many hydrogen ions per volume of water.
The substance with the lower pH has 1,000 times as many hydrogen ions per volume of water.
The substance with the lower pH has 1,000 times as many hydrogen ions per volume of water.
The substance with the lower pH has twice as many hydrogen ions per volume of water.
The substance with the lower pH has twice as many hydrogen ions per volume of water.
The substance with the higher pH has twice as many hydrogen ions per volume of water.
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The correct statement is:
The substance with the lower pH has 1,000 times as many hydrogen ions per volume of water.
This is because the pH scale is logarithmic: each whole number change on the scale represents a tenfold change in hydrogen ion concentration. A pH of 3.0 is three units lower than a pH of 6.0, which means the concentration of hydrogen ions is \(10^3\) or 1,000 times greater in the substance with pH 3.0 compared to the substance with pH 6.0.
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