a) PTHH: Na2O + H2O \(\rightarrow\) 2NaOH
b) n\(Na_2O\) = \(\frac{12,4}{62}=0,2\left(mol\right)\)
Theo PT: nNaOH =2n\(Na_2O\) =2.0,2=0,4 (mol)
=> CM NaOH = \(\frac{0,4}{0,25}=1,6\left(M\right)\)
c) PTHH: CO2 + 2NaOH \(\rightarrow\) Na2CO3 + H2O
Theo PT: n\(CO_2\) = \(\frac{1}{2}n_{NaOH}=\frac{1}{2}.0,4=0,2\left(mol\right)\)
=> V\(CO_2\) = 0,2.22,4 = 4,48 (l)
nNa2O= 12,4/62= 0,2mol
Na2O +H20----> 2NaOH
pt: 1mol 2mol
đb: 0,2mol ?
theo pt: nNa2O= 1/2nNaOH
=) nNaOH= 0.2.2= 0,4mol
250ml= 0,25l
CMNaOH= 0,4/0,25=
=) CMNaOH= 1,6M
NaOH+ CO2------> NaHCO3
pt: 1mol 1mol
đb: 0,4mol ?
theo pt: nCO2= nNaOH= 0,4mol
=) VCO2= 0,4.22,4= 8,96l