Question

In 150 mL solutie NaOH se gasesc 2g NaHO .Determina concentratia molara a solutie

Answer 1

Răspuns:

Explicație:

M NaOH = 40 g/mol

n = 2 : 40 = 0,05 mol NaOH

150 mL solutie.................0,05 mol NaOH

1000 mL solutie................c

c = 0,05*1000/150 = 0,(3) M