Răspuns:
ms=500g
C=10%
md=?
md=C×ms/100=10×500/100=50g
MNaOH =23+16+1=40g/mol
MCO2=12+2×16=44g/ml
MNHCO3=23+1+12+3×16=84g/mol
40g.........44g...........84g
NaOH + CO 2=> NaHCO3
xg...............yg..............50g
x=40×50/84=calculează
y=44×50/84=calculează
