Question

Cual sera la molaridad de NaOH. que contiene 16 g de NaOH disuelta 200 mL de agua

Answer 1

Mm NaOH = 40 g/mol

V = 200 / 1000 = 0.2 L

M = mol soluto / V(L)

1. calcular  mol

mol = masa/Mm

mol = 16 g / 40 g/mol = 0.4 mol NaOH

2. Calcular M = mol soluto /V(L)

M = 0.4 mol / 0.2 L

M = 2 molar