Hòa tan oxit bằng axit sunfuric

T

thupham22011998

[TEX]M_xO_y+yH_2SO_4-->xM(SO_4)_{\frac{y}{x}}+yH_2O[/TEX]
1......................y....................x mol

Ta có:
[TEX]m d/d H_2SO_4=\frac{98y.100}{24,5}=400y [/TEX]

[TEX] m M(SO_4)_{\frac{y}{x}}=Mx+96y[/TEX]

[TEX]m d/d sau pu=m M_xO_y+m d/d H_2SO_4=Mx+16y+400y=Mx+416y [/TEX]

[TEX]C%M(SO_4)_{\frac{y}{x}}=\frac{Mx+96y}{416y+Mx}=32,2%[/TEX]

[TEX]\Leftrightarrow M=28.\frac{2y}{x}[/TEX]

Lập bảng \Rightarrow M là Fe (II)
 
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