Làm ở điều kiện tiêu chuẩn nhé
Giải:
\(n_{SO_2}=\dfrac{56}{1000}:22,4=0,0025\left(mol\right)\)
\(n_{Ca\left(OH\right)_2}=0,3.0,01=0,003\left(mol\right)\)
\(SO_2+Ca\left(OH\right)_2\rightarrow CaSO_3+H_2O\)
0,0025 --------------> 0,0025
Xét \(\dfrac{0,0025}{1}< \dfrac{0,003}{1}\) => \(Ca\left(OH\right)_2\) dư
\(m_{kt}=m_{CaSO_3}=0,0025.120=0,3\left(g\right)\)
\(n_{SO_2}=\dfrac{0,056}{22,4}=0,0025\left(mol\right)\\ n_{Ca\left(OH\right)_2}=0,3.0,01=0,003\left(mol\right)\\ SO_2+Ca\left(OH\right)_2\xrightarrow[]{}CaSO_3+H_2O\\ \Rightarrow\dfrac{0,0025}{1}< \dfrac{0,003}{1}\Rightarrow Ca\left(OH\right)_2.dư\\ n_{CaSO_3}=n_{Ca\left(OH\right)_2}=n_{SO_2}=0,0025mol\\ m_{CaSO_3}=0,0025.120=0,3\left(g\right)\)
