\(n_{NaOH}=1\left(mol\right)\)
a.\(n_{SO2}=\frac{17,92}{22,4}=0,8\left(mol\right)\)
\(\rightarrow1< \frac{n_{NaOH}}{n_{SO2}}=\frac{1}{0,8}< 2\)
\(\rightarrow\) Tạo hai muối
\(SO_2+NaOH\rightarrow Na_2SO_3+H_2O\)
a ______ 2a_______ a___________
\(SO_3+NaOH\rightarrow NaHSO_3\)
b_________b ______ b
Giải hệ phương trình :
\(\left\{{}\begin{matrix}a+b=0,8\\2a+b=1\end{matrix}\right.\rightarrow\left\{{}\begin{matrix}a=0,2\\b=0,6\end{matrix}\right.\)
\(\rightarrow CM_{Na2SO3}=\frac{0,2}{0,5}=0,4\)
\(CM_{NaHSO3}=\frac{0,6}{0,5}=1,2\)
b. \(n_{SO2}=\frac{11,2}{22,4}=0,5\)
\(\rightarrow\frac{n_{NaOH}}{n_{SO2}}=2\)
\(\rightarrow\) Tạo Na2SO3
\(n_{Na2SO3}=n_{SO2}=0,5\)
\(\rightarrow CM_{Na2SO3}=\frac{0,5}{0,5}=1\)
c. \(n_{SO2}=\frac{8,96}{22,4}=0,4\)
\(\rightarrow\frac{n_{NaOH}}{n_{SO2}}=\frac{1}{0,4}>2\)
\(\rightarrow\) Tạo Na2SO3 và NaOH dư
\(SO_2+2NaOH\rightarrow Na_2SO_3+H_2O\)
0,4______0,8________ 0,4__________
\(\rightarrow n_{NaOH_{Du}}=1-0,8=0,2\)
\(\rightarrow CM_{Na2SO3}=\frac{0,4}{0,5}=0,8M\)
\(\rightarrow CM_{NaOH}=\frac{0,2}{0,5}=0,4M\)