One liter of a solution of pH 8 has how many more hydroxyl i

One liter of a solution of pH 8 has how many more hydroxyl ions (OH^-) than 1 L of a solution of pH 4? A) 50,000 times more B) 32 times more C) 100,000 times more D) 5 times more E) 10,000 times more

Solution

One litre of a solution pf ph 8 has how many more hydroxyl ions (OH-) than 1 L of a solution of ph 4 ?

option E

Answer = 10,000 times more

pH =[H+] + [OH-]

pH =8 means (H+) is 10^-8 molar. But that means (OH-) is 10^-6 at the same time.
Ph= 4 means (H+) is 10^-4 molar. But that means (OH-) is 10^-10 at the same time.

10^-6 / 10^-10 = 10^4 or 10,000 times more.