We know that pure water has a pH = 7. What is the concentration of H+ ions present in pure water? (Hint: the equation used to calculate the pH is: pH = -log(concentration of H+). Recall that the opposite of a logarithm function is 10*, so you will need to rearrange our pH equation to solve for the (concentration of H+). Also, don't forget that negative sign!) 1x10-7 1x107 1x10-14 7.0 O O O

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