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Chemistry
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What is the pH of a 7.69E-2 M solution of HCl (which is a strong acid)? 

What is the hydroxide ion concentration of the acid solution described in the previous question? Enter your answer in scientific notation. 

Apr 2nd, 2015

pH = - log(7.69 E-2) = 1.11 (the concentration [H+] equals the concentration of HCl - a strong acid)

The hydroxide concentration is [OH-] = 10^{-14} / [H+] = 10^{-14} / 7.69 * 10^{-2} = 1.3 * 10^{-13}. 

Note that [H+] * [OH-] = 10^{-14}  the product of concentrations  is constant

Apr 2nd, 2015

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