a) Ta có: \(\left\{{}\begin{matrix}n_{SO_2}=0,005mol\\n_{Ba\left(OH\right)_2}=0,007mol\end{matrix}\right.\) \(\Rightarrow\) Tạo muối trung hòa
PTHH: \(SO_2+Ba\left(OH\right)_2\rightarrow BaSO_3+H_2O\)
b) \(SO_2\) phản ứng hết nên tính theo \(SO_2\)
Ta có: \(\left\{{}\begin{matrix}n_{BaSO_3}=n_{H_2O}=n_{SO_2}=0,005mol\\n_{Ba\left(OH\right)_2\left(dư\right)}=0,002mol\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}m_{BaSO_3}=0,005\cdot217=1,085\left(g\right)\\m_{H_2O}=0,005\cdot18=0,09\left(g\right)\\m_{Ba\left(OH\right)_2\left(dư\right)}=0,002\cdot171=0,342\left(g\right)\end{matrix}\right.\)
c) Ta có: \(C_{M_{Ba\left(OH\right)_2\left(dư\right)}}=\frac{0,002}{0,812}\approx0,0025\left(M\right)\)
a, Ta có: \(n_{SO_2}=\frac{0,112}{22,4}=0,005\left(mol\right)\)
\(n_{Ba\left(OH\right)_2}=0,7.0,01=0,007\left(mol\right)\)
\(\Rightarrow\frac{n_{SO_2}}{n_{Ba\left(OH\right)_2}}=\frac{0,005}{0,007}\approx0,714\)
Vậy: Pư chỉ tạo muối trung hòa BaCO3.
PT: \(SO_2+Ba\left(OH\right)_2\rightarrow BaSO_{3\downarrow}+H_2O\)
b, Chất chất sau pư gồm: BaSO3 , H2O và Ba(OH)2 dư.
Theo PT: \(n_{BaSO_3}=n_{H_2O}=n_{Ba\left(OH\right)_2\left(pư\right)}=n_{SO_2}=0,005\left(mol\right)\)
\(\Rightarrow n_{Ba\left(OH\right)_2\left(dư\right)}=0,002\left(mol\right)\)
\(\Rightarrow\left\{{}\begin{matrix}m_{BaSO_3}=0,005.217=1,085\left(g\right)\\m_{H_2O}=0,005.18=0,09\left(g\right)\\m_{Ba\left(OH\right)_2\left(dư\right)}=0,002.171=0,342\left(g\right)\end{matrix}\right.\)
c, Ta có: \(C_{M_{Ba\left(OH\right)_2\left(dư\right)}}=\frac{0,002}{0,112+0,7}\approx0,00246M\)
Bạn tham khảo nhé!