Question

Осуществить цепочки химических превращений. 1.Fe--Fe2O3--Fe(SO4)3--Fe(OH)2--FeO3 2.Ca--CaO--Ca(No3)2--CaCo3 3.Be--BeO--Be(OH)2--BeCl2

Answer 1

1) 4Fe+3O2 -> 2Fe2O3
Fe2O3 + 3H2SO4 -> Fe2(SO4)3 + 3H2O
Fe2(SO4)3 + 6NaOH ->2Fe(OH)3 + 3Na2SO4
2Fe(OH)3 -> Fe2O3 + 3H2O

2) 2Ca + O2 -> 2CaO
CaO + 2HNO3 -> Ca(NO3)2 + H2O
Ca(NO3)2 + Na2CO3 -> CaCO3 + 2NaNO3

3) 2Be + O2 -> 2BeO
BeO + H2O -> Be(OH)2
Be(OH)2 + 2HCl -> BeCl2 + 2H2O

Answer 2

Цепочка химических превращений для Fe:

1. Fe → Fe2O3 2. Fe2O3 → Fe(SO4)3 3. Fe(SO4)3 → Fe(OH)2 4. Fe(OH)2 → FeO3

Цепочка химических превращений для Ca:

1. Ca → CaO 2. CaO → Ca(NO3)2 3. Ca(NO3)2 → CaCO3

Цепочка химических превращений для Be:

1. Be → BeO 2. BeO → Be(OH)2 3. Be(OH)2 → BeCl2

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