Problem 934


The concentration of hydrogen ions in a liquid laboratory sample is 0.0000001 moles/liter. Find the pH of the sample.




The formula for the pH of a liquid is given by the logarithmic equation pH = – log10 [H+], where [H+] is the concentration of hydrogen ions in moles per liter.

Express 0.0000001 as a power of 10 before substituting it into the formula.

0.0000001 = 10-7

= – (-7)

= 7

So , the pH of the laboratory sample is 7. Because this pH is equal to 7, the sample is neutral.



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