a)
\(Na2CO3+2HCl\rightarrow2NaCl+H2O+CO2\left(1\right)\)
x-----------------2x-----------------------------------x
\(K2CO3+2HCl\rightarrow2KCl+H2O+CO2\left(2\right)\)
y----------2y---------------------------------------y
\(n_{CO2}=\frac{1,12}{22,4}=0,05\left(mol\right)\)
Theo bài ta có hpt
\(\left\{{}\begin{matrix}106x+138y=5,94\\x+y=0,05\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=0,02\\y=0,03\end{matrix}\right.\)
\(\%m_{Na2CO3}=\frac{0,02.106}{5,94}.100\%=35,69\%\)
\(\%m_{K2CO3}=100-35,69=64,31\%\)
b) Mk nghĩ ở đây phải là 300g dd HCl chứ nhỉ
\(m_{CO2}=0,05.44=2,2\left(g\right)\)
\(mdd=5,94+300-2,2=303,74\left(g\right)\)
\(m_{NaCl}=0,04.58,5=2,34\left(g\right)\)
\(C\%_{NaCl}=\frac{2,34}{303,74}.100\%=0,77\%\)
\(m_{KCl}=0,06.74,5=4,47\left(g\right)\)
\(C\%_{KCl}=\frac{4,47}{303,74}.100\%=1,47\%\)
Chúc bạn học tốt :))
