if the pH is 7.5 what is the H3o+ in the item?

Question

how about pH of 9.6?

Answer 1

pH=-log(H+)
then H+ or H3O+ if done in water is:
10^(-1*pH)
For plugging in 7.5 in above returns: 3.16 x 10 -8 M (molar concentration)
similarly pH 9.6= 2.51 x 10 -10 M

Answer 2

pH = log 1/[H3O]+ the brackets mean concentrations


[H3O]+ = 10^(-ph)


for pH 7.5 [H3O]+ = 10^-7.5
for pH 9.6 [H3O]+ = 10^-9.6