Answer :
pH = - log [H⁺]
pH = 7.5
[tex]\tt [H^+]=10^{-7.5}=3.16\times 10^{-8}[/tex]
pH + pOH = 14
7.5 + pOH = 14
pOH = 6.5
[tex]\tt [OH^-]=10^{-6.5}=3.16\times 10^{-7}[/tex]
pH = - log [H⁺]
pH = 7.5
[tex]\tt [H^+]=10^{-7.5}=3.16\times 10^{-8}[/tex]
pH + pOH = 14
7.5 + pOH = 14
pOH = 6.5
[tex]\tt [OH^-]=10^{-6.5}=3.16\times 10^{-7}[/tex]