\(n_{Fe2O3}=\dfrac{4,8}{160}=0,03\left(mol\right)\)
Pt ; \(Fe_2O_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O|\)
1 3 1 3
0,03 0,09 0,03
a) \(n_{H2SO4}=\dfrac{0,03.3}{1}=0,09\left(mol\right)\)
\(m_{H2SO4}=0,09.98=8,82\left(g\right)\)
\(m_{ddH2SO4}=\dfrac{8.82.100}{19,6}=45\left(g\right)\)
b) \(n_{Fe2\left(SO4\right)3}=\dfrac{0,09.1}{3}=0,03\left(mol\right)\)
⇒ \(m_{Fe2\left(SO4\right)3}=0,03.400=12\left(g\right)\)
\(m_{ddspu}=4,8+45=49,8\left(g\right)\)
\(C_{Fe2\left(SO4\right)3}=\dfrac{12.100}{49,8}=24,1\)0/0
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