Răspuns:
MHCl=1+35,5=36,5g/mol
n=m/M
m=n×M=0,45×36,5=16,425g HCl
MNa2CO3 =2×23+12+3×16=106g/mol
106g............2×36,5g
Na2CO3 + 2HCl => 2NaCl + CO2 + H2O
xg..............16,425g
x= 16,245×106/2×36,5= calculează
MNaOH =23+16+1=40g/mol
40g.........36,5g
NaOH + HCl => NaCl + H2O
yg............16,425g
y=16,425×40/36,5= calculează