Câu 5 :
\(n_{K2SO3}=\dfrac{15,8}{158}=0,1\left(mol\right)\)
Pt : \(K_2SO_3+2HCl\rightarrow2KCl+SO_2+H_2O|\)
1 2 2 1 1
0,1 0,2 0,2 0,2
a) \(n_{HCl}=\dfrac{0,1.2}{1}=0,2\left(mol\right)\)
\(m_{HCl}=0,2.36,5=7,3\left(g\right)\)
\(m_{ddHCl}=\dfrac{7,3.100}{8}=91,25\left(g\right)\)
b) \(n_{KCl}=\dfrac{0,2.2}{2}=0,2\left(mol\right)\)
⇒ \(m_{KCl}=0,2.74,5=14,9\left(g\right)\)
\(m_{ddspu}=15,8+91,25-\left(0,1.64\right)=100,65\left(g\right)\)
\(C_{KCl}=\dfrac{14,9.100}{100,65}=14,80\)0/0
c) \(n_{SO2}=\dfrac{0,2.1}{2}=0,1\left(mol\right)\)
\(V_{SO2\left(dktc\right)}=0,1.22,4=2,24\left(l\right)\)
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