Berapa gram NaOH terdapat dalam 500mL . Larutan NaOH 0,2 M? (Ar Na= 23, O=16 , H=1)

M = gr/mr × 1000/ml
0,2 = gr/40 × 1000/500
0,2 × 40 = 2gr
8 = 2gr
gr = 8/2
gr = 4

V = 500 mL = 0,5 liter
M = 0,2 M.
Mr NaOH
= Ar Na + Ar O + Ar H
= 23 + 16 + 1
= 40.


M = n / V

n = M x V
n = 0,2 x 0,5
n = 0,1 mol

massa NaOH
= n x Mr NaOH
= 0,1 x 40
= 4 gram