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23 April, 21:35

Tear-free shampoos are advertised as having a pH similar to that of human tears. What pH would you expect tear-free shampoos to be?

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Answers (2)
  1. 23 April, 21:37
    0
    Answer: 7

    Explanation:

    The pH of water, a neutral substance, is 7. Human tears are a saline composed mostly of water. Therefore, it stands to reason that a tear-free shampoo would have a similar pH close to 7.
  2. 23 April, 21:45
    0
    the pH level would be 7
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