What is the \( \mathrm{pH} \) of \( 10^{-7} \mathrm{M}-\mathrm{HCl}...

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What is the \( \mathrm{pH} \) of \( 10^{-7} \mathrm{M}-\mathrm{HCl} \) solution at \( 25^{\circ} \mathrm{C} \) ?
P
(1) 7.0
(2) 6.70
W
(3) 6.62
(4) 6.79
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