The \( \mathrm{pH} \) of a \( 10^{-9} \mathrm{M} \) solution of \( ...

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The \( \mathrm{pH} \) of a \( 10^{-9} \mathrm{M} \) solution of \( \mathrm{HCl} \) in water is:
P
(1) 8
W
(2) -8
(3) Between 7 and 8
(4) Between 6 and 7
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