Na2CO3+ 2HCl ------> 2NaCl + CO2+ H2O (1)
0.25V.......0.5V................0.5V.....0.25V...0.25V
Na2CO3+ H2SO4-------->Na2SO4+ CO2+ H2O (2)
1.5V...........1.5V.................1.5V........1.5V...1.5V
a)nCO2= 0.35 mol
nHCl=0.5V
nH2SO4=1.5V
Theo Pt (1) và (2)
nCO2=0.25V+1.5V=0.35
<=>1.75V=0.35=>V=0.2 lít=200 ml
b)mNa2CO3=(0.25V+1.5V)*106=0.35*106=37.1 (g)