1. FexOy + H2SO4 đặc, nóng → Fe2(SO4)3 + SO2 + H2O
2. MxOy + HNO3 → M(NO3)n + NO + H2O
Câu trả lời tốt nhất
1. FexOy + H2SO4 → Fe2(SO4)3 + SO2 + H2O
2FexOy —> 2xFe3+ + 2(3x – 2y)e
S+6 + 2e —> SO2
2FexOy + (6x – 2y)H2SO4 → xFe2(SO4)3 + (3x – 2y)SO2 + (6x – 2y)H2O
2. MxOy + HNO3 → M(NO3)n + NO + H2O
MxOy —> xMn+ + (nx – 2y)e
N+5 + 3e —> NO
3MxOy + (4nx – 2y)HNO3 → 3xM(NO3)n + (nx – 2y)NO + (2nx – y)H2O
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