larutan naoh 10% massa mempunyai massa jenis 1,05 g/mol. tentukan konsentrasi larutan naoh dalam A. molalitas B. Molaritas C. Fraksi mol

a. m=Wt/Mr×1000/Wp
=10/40×1000/90
=2.78

b. ρ = m/v
1.05 = 100/v
v= 95.24
M = g/Mr×1000/v
= 10/40×1000/95.24
= 2.62

c. Xnaoh = 0.25/0.25+5
=0.25/5.25 = 0.048