The molar concentration of OH in a water solution is 1.0 10-9. The pH of the solution is?
The molar concentration of OH in a water solution is 1.0 10-9. The pH of the solution is
a. 9.00 b. 5.00 c. > 9.00 d. < 5.00
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The pH is 5.
1. Find the concentration of H+ ions in solution
Kw= [H+][OH-] = 1.0x10^-14
[H+] = 1.0x10^-14 / 1.0x10^-9
= 0.00001
2. Find the pH using H+ concetration
pH = -log([H+)]
= -log(0.00001)
= 5 = B