\(m_{HCl}=200.14,6\%=29,2\left(g\right)\)
\(n_{HCl}=\frac{29,2}{36,5}=0,8\left(mol\right)\)
\(Na_2CO_3+2HCl\rightarrow2NaCl+CO_2+H_2O\)
x__________________2x______x____________
\(KHCO_3+HCl\rightarrow KCl+CO_2+H_2O\)
y__________________y______y____________
\(n_{NaOH}=0,4.1=0,4\left(mol\right)\)
Giải hệ PT:
\(\left\{{}\begin{matrix}106x+100y=25,9\\2x+y=0,4\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=0,15\\y=0,1\end{matrix}\right.\)
\(\Rightarrow n_{CO2}=x=0,15\left(mol\right)\)
a,\(V_{CO2}=0,15.22,4=3,36\left(l\right)\)
b,
\(\%_{NaCl}=\frac{\left(2.0,15\right).58,5}{\left(2.0,15\right).58,5+0,1.74,5}.100\%=70,2\%\)
\(\Rightarrow\%_{KCl}=100\%-70,2\%=29,8\%\)