Question

hoà tan 4,64 g fe3o4 vào 200 ml dd h2so4 aM thu đc dd X 

a) xđ a 

b) xđ C% các chất trong dd X

 

 

Answer 1

\(n_{Fe_3O_4}=\dfrac{4.64}{232}=0.2\left(mol\right)\)

\(Fe_3O_4+4H_2SO_4\rightarrow FeSO_4+Fe_2\left(SO_4\right)_3+4H_2O\)

\(0.2...............0.8.............0.2...........0.2\)

\(C_{M_{H_2SO_4}}=\dfrac{0.8}{0.2}=4\left(M\right)\)

\(C_{M_{FeSO_4}}=C_{M_{Fe_2\left(SO_4\right)_3}}=\dfrac{0.2}{0.2}=1\left(M\right)\)