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1. Rearrange each equation to solve for the variable in bold.

1. pH = -log[H₃O⁺]

   [H₃O⁺] = e^pH
   [H₃O⁺] = e^-pH
   [H₃O⁺] = 10^pH
   [H₃O⁺] = 10^-pH

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5.