diketahui larutan asam klorida (HCL) dengan kadar 67%. massa jenis 1,1gram/mL tentukan molaritasnya dan molalitas?

Diketahui :
Kadar HCl = 67 %
massa jenis = 1,1 g/ml
Mr HCl = 36

Jawab :
massa HCl = 67 gram
massa jenis = massa/volume
1,1 = 67/v
v = 60,9 ml

mol = gram/mr
mol HCl = 67/36 = 1,86 mol

M = mol/v
M = 1,86/0,0609
M = 30,5 M

m = %/Mr . 1000/100-%
m = 67/36 . 1000/33
m = 56,36