how many H + ions are in a solution with a pH of 2 and how many H + ions are in a solution with a pH of 6?

i) pH = 2

pH = - log (H+)

: - (H+) = 10^ (-2)

: - (H+) = 0.01 M

ii) pH = 6

pH = - log (H+)

: - (H+) = 10^ (-6)

: - (H+) = 0.000001 M

Explanation:

By definition: pH = - log (H+).

Given your pH, solve for the H + using the the following log rule:

if a = (+/-) log (b) then

b = 10^ ((+/-) a).

Also remember unit of concentration is molar (M)