Ta có: \(n_{CO_2}=\dfrac{0,448}{22,4}=0,02\left(mol\right)\)
a. PTHH: CaSO3 + HCl ---x--->
CaCO3 + 2HCl ---> CaCl2 + CO2 + H2O
Theo PT: \(n_{HCl}=2.n_{CO_2}=2.0,02=0,04\left(mol\right)\)
Đổi 200ml = 0,2 lít
=> \(C_{M_{HCl}}=\dfrac{0,04}{0,2}=0,2M\)
b. Theo PT: \(n_{CaCO_3}=n_{CO_2}=0,02\left(mol\right)\)
=> \(m_{CaCO_3}=0,02.100=2\left(g\right)\)
=> \(\%_{m_{CaCO_3}}=\dfrac{2}{5}.100\%=40\%\)
\(\%_{m_{CaSO_4}}=100\%-40\%=60\%\)