Question

Masa solutiei 500g
Masa subst, dizolvate 100g
Masa apei in solutie si volumul ei m(H2O) V (H2O)
pARTEA DE MASA A SUBST. DIZOLvate in solutie ω

Answer 1

se face la fel ca cealalta

ms=md+mH2O
mH20=500-100=400 g

pH2O=1g/L
p=m/V
V(H2O)=m/p=400/1=400 L

ω=md/ms=100/500=0.2