If the H + in a solution is 1x10^-1 mol/L what is the OH-

PH scale is used to determine how acidic or basic a solution is.

we have been given the hydrogen ion concentration. Using this we can calculate pH,

pH = - log[H⁺]

pH = - log (1 x 10⁻¹ M)

pH = 1

using pH can calculate pOH

pH + pOH = 14

pOH = 14 - 1

pOH = 13

using pOH we can calculate the hydroxide ion concentration

pOH = - log [OH⁻]

[OH⁻] = antilog (-pOH)

[OH⁻] = 10⁻¹³ M

hydroxide ion concentration is 10⁻¹³ M