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if a sample of a certain solution is determined to have a [H30+] concentration of 1.48 X 10-2moles/liter, what is its pH? Round off your answer to one decimal place.

Respuesta :

SOLUTION

The pH of a solution is the negative logarithm of the hydrogen or hydroxonium ion concentration to the base of 10. That is

[tex]pH=-log_{10}[H_3O^+][/tex]

From the question, we have that

[tex][H_3O^+]=1.48\times10^{-2}[/tex]

So the pH becomes

[tex]\begin{gathered} pH=-log_{10}(1.48\times10^{-2}) \\ =-(log_{10}1.48+log_{10}10^{-2}) \\ =-(0.170261+(-2) \\ =-(0.170261-2) \\ =-(-1.8297) \\ =1.8297 \end{gathered}[/tex]

Hence the answer is 1.8 to one decimal place

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