Đặt :
nH2SO4(mp) = x mol
nHCl (mp) = y mol
P1 :
nBaSO4 = 0.03 mol
BaCl2 + H2SO4 --> BaSO4 + 2HCl
_________0.03______0.03
P2 :
nCO2 = 0.04 mol
Na2CO3 + H2SO4 --> Na2SO4 + CO2 + H2O
__________0.03_______________0.03
Na2CO3 + 2HCl --> 2NaCl + CO2 + H2O
__________0.02___________0.04-0.03
nH2SO4 = 0.03 * 2 = 0.06 mol
nHCl = 0.02 * 2 = 0.04 mol
CM H2SO4 = 0.06/0.01=6M
CM HCl = 0.04/0.01 = 4M