Question

Calcule POH e PH
→ [ H+]= 4.10-8

Answer 1

pH = - log [H⁺]        

[H⁺] = 4.10⁻⁸ mol/L

pH = - log [ 4.10⁻⁸ ]

pH = 7,38

pH + pOH = 14

7,38 + pOH = 14

pOH = 14 - 7,38

pOH = 6,62

espero ter ajudado!