dd A \(\left\{{}\begin{matrix}Mg^{2+}\left(0,01\right)\\NH_4^+\left(0,02\right)\\SO_4^{2-}\left(a\right)\\Cl^-\left(0,02\right)\end{matrix}\right.+Ba\left(OH\right)_2\left(0,02\right)\)
bảo toàn điện tích \(0,01.2+0,02=2a+0,02\Rightarrow a=0,01\)
\(Ba^{2+}+SO_4^{2-}\rightarrow BaSO_4\left(0,01\right)\)
\(Mg^{2+}+2OH^-\rightarrow Mg\left(OH\right)_2\left(0,01\right)\)
\(NH_4^++OH^-\rightarrow NH_3\left(0,02\right)+H_2O\)
kết tủa \(\begin{matrix}BaSO_4\left(0,01\right)\\Mg\left(OH\right)_2\left(0,01\right)\end{matrix}\) \(m=0,01.233+0,01.58=2,91g\)
\(V_{NH_3}=0,02.22,4=0,448l\)