A pH of 1.5 is _____ times more acidic than a pH of 4.0.

Answer 1

what is 10^2.5?

Answer 2

316
[H+] = 10^-1.5 = 0.0316
[H+] = 10^-4.0 = 0.0001
0.0316 / 0.0001 = 316