a) K2CO3 + 2HCl → 2KCl + CO2 + H2O
\(n_{CO_2}=\frac{0,448}{22,4}=0,02\left(mol\right)\)
b) Theo PT: \(n_{HCl}=2n_{CO_2}=2\times0,02=0,04\left(mol\right)\)
(thiếu đề)
c) Theo Pt: \(n_{K_2CO_3}=n_{CO_2}=0,02\left(mol\right)\)
\(\Rightarrow m_{K_2CO_3}=0,02\times138=2,76\left(g\right)\)
\(\Rightarrow\%m_{K_2CO_3}=\frac{2,76}{4}\times100\%=69\%\)
\(\Rightarrow\%m_{NaCl}=100\%-69\%=31\%\)
nCO2 = 0.448/22.4=0.02 mol
K2CO3 + 2HCl --> 2KCl + CO2 + H2O
0.02_____0.04___________0.02
mK2CO3 = 2.76 g
mNaCl = 4 - 2.76 = 1.24 g
%K2CO3 = 69%
%NaCl = 31%