Equal volumes of two \( \mathrm{HCl} \) solutions of \( \mathrm{pH}=3 \) and \( \mathrm{pH}=5 \)...

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Equal volumes of two \( \mathrm{HCl} \) solutions of \( \mathrm{pH}=3 \) and \( \mathrm{pH}=5 \) were mixed. What is the \( \mathrm{pH} \) of the resulting solution?
(a) \( 3.5 \)
(b) \( 4.0 \)
(c) \( 4.5 \)
(d) \( 3.3 \)
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