Which of the following best describes the relationship between an acid with a pH of 3 and an acid with a pH of 6?

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Correct Answer: D. pH of 3 is 1000x stronger than a pH of 6
The pH scale is based on factors of 10, with each unit representing 10. There are 3 pH units between pH 3 and pH 6, therefore the difference in strength of the two acids is 103 or a 1000 times difference. The lower the pH, the stronger the acid. Thus, an acid with a pH of 3 is 1000x stronger than an acid with a pH of 6.
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