If the ph of a solution is increased from ph 5 to ph 7, it means that the a. concentration of h+ is twice (2x) what it was at ph 5. b. concentration of h+ is one-half (1/2) what it was at ph 5. c. concentration of oh- is 100 times greater than what it was at ph 5. d. concentration of h+ is 100 times greater and the concentration of oh- is one-hundredth what they were at ph 5.