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As the pH of a system decreases:

the [H+] decreases

the Kw decreases

the [OH-] decreases

all of the above

  • chemistry -

    As the pH decreases the H^+ gets larger.
    Kw is a constant and changes only with temperature.
    If pH gets smaller, H^+ becomes larger and OH becomes smaller.
    Look at (H^+)(OH^-) = Kw.
    If H goes up, OH must go down. If OH goes up, H^+ must go down. Kw doesn't move so H or OH must if the other one moves.

  • chemistry -

    so the answer would be OH- decreases

  • chemistry -


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