Question

Hallar el pH de la siguiente disolucion. 2 g de NaOH en 500 mL de solucion

Answer 1

Mm Naoh =  40 g/mol

mol = masa/Mm

mol = 2 g/ 40 g/mol = 0.05

V= 500 / 1000 = 0.500 L

M = mol/L

M =0.05 mol / 0.5 L

M = 0.1

pH = -log [H⁺]

pH = -log (0.1 )

pH =- (-1)

pH = 1

pOH + pH = 14

pOH = 14 - 1 

pOH = 13