Introduction to Acids and Bases

AP Chemistry· difficulty 1/5

The pH scale above shows approximate pH values for several common substances.

0 7 14 stomach (1) vinegar (3) milk (6.5) soap (10) bleach (13) acidic basic

By what factor is the [H+] in vinegar (pH 3) greater than in milk (pH 6.5)?

  • A

    About 100

  • B

    About 3000

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  • C

    About 30

  • D

    About 3

Explanation

Difference of 3.5 pH units means 10^3.5 ~ 3160 times more [H+] in vinegar than milk.

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