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