The pH of water is a measure of what?

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Answer 1 · 2017-02-01T19:38:12

Of the concentration of the $"hydronium ion........."$

$pH=-log_10[H_3O^+]$

Given the following equilibrium:

$2H_2O(l) rightleftharpoonsH_3O^+ + HO^-$

$K_w=[H_3O^+][HO^-]=10^-14$ at $298*K$

$pK_w=-log_10[H_3O^+]-log_10[HO^-]=-log_(10)10^-14$

$+14=pH+pOH$

At neutrality, $[HO^-]=[H_3O^+]$ , and $pH=pOH=7.$