nCa(OH)2 = 0.5*0.016 = 0.008 mol
nCO2 = 0.224/22.4=0.01 mol
nCO2/nCa(OH)2 = 0.01/0.008= 1.25 => Tạo ra 2 muối
Đặt :
nCO2 (1) = x mol
nCO2 (2) = y mol
<=> x + y = 0.01 (I)
Ca(OH)2 + CO2 --> CaCO3 + H2O (1)
x__________x
Ca(OH)2 + 2CO2 --> Ca(HCO3)2 (2)
0.5y________y________0.5y
nCa(OH)2 = x + 0.5y = 0.008 (II)
Giải (I) và (II) :
x = 0.006
y = 0.004
CM Ca(HCO3)2 = 0.002/0.5 = 0.004 M