Question

Помогите!Срочно!Пожалуйста! 1.Дописать схемы реакций и составить уравнения. а) Fe+F2->(t) FeO+H2SO4-> Fe(OH)2-> b) Fe+AgNO3-> Fe2O3+MgCO3->(t) Fe(OH)3+H3PO4-> c)Fe+FeCl3-> Fe3O4+H2->(t) FeS+HBr-> d)FeCl2+Na2CO3-> Fe(NO3)3+NaOH-> Fe2(SO4)3+Ba(NO3)2->

Answer 1

а) 2Fe+3F2=2FeF3

     FeO+H2SO4=FeSO4+H2O

     Fe(OH)2=FeO+H2O

б) Fe+2AgNO3=Fe(NO3)2+2Ag

     Fe2O3+3MgCO3=3MgO+Fe2(CO3)3

     Fe(OH)3+H3PO4=FePO4+3H2O

 с)  (неправильно записано дано)

     Fe3O4+4H2=4H2O+3Fe

     FeS+2HBr=FeBr2+H2S

 д) FeCl2+Na2CO3=FeCO3+2NaCl

      Fe(NO3)3+3NaOH=Fe(OH)3+3NaNO3

      Fe2(SO4)3+3Ba(NO3)2=2Fe(NO3)3+3BaSO4

Answer 2

a) Fe + F2 -> (t) FeO + H2SO4 -> Fe(OH)2 ->

The given reaction can be broken down into the following steps:

1. Fe + F2 -> FeF2 (formation of iron(II) fluoride) 2. FeF2 + H2SO4 -> FeSO4 + 2HF (formation of iron(II) sulfate and hydrogen fluoride) 3. FeSO4 + 2NaOH -> Fe(OH)2 + Na2SO4 (formation of iron(II) hydroxide and sodium sulfate)

The overall balanced equation for the reaction is:

Fe + F2 + H2SO4 + 2NaOH -> Fe(OH)2 + Na2SO4

b) Fe + AgNO3 -> Fe2O3 + MgCO3 -> (t) Fe(OH)3 + H3PO4 ->

The given reaction can be broken down into the following steps:

1. Fe + AgNO3 -> Fe(NO3)2 + Ag (formation of iron(II) nitrate and silver) 2. Fe(NO3)2 + Na2CO3 -> FeCO3 + 2NaNO3 (formation of iron(II) carbonate and sodium nitrate) 3. FeCO3 + H2O -> Fe(OH)3 + CO2 (formation of iron(III) hydroxide and carbon dioxide) 4. Fe(OH)3 + H3PO4 -> FePO4 + 3H2O (formation of iron(III) phosphate and water)

The overall balanced equation for the reaction is:

Fe + AgNO3 + Na2CO3 + H3PO4 -> FePO4 + Ag + 2NaNO3 + CO2 + 3H2O

c) Fe + FeCl3 -> Fe3O4 + H2 -> (t) FeS + HBr ->

The given reaction can be broken down into the following steps:

1. Fe + FeCl3 -> FeCl2 (formation of iron(II) chloride) 2. FeCl2 + H2 -> Fe + 2HCl (formation of iron and hydrogen chloride) 3. Fe + S -> FeS (formation of iron(II) sulfide) 4. FeS + 2HBr -> FeBr2 + H2S (formation of iron(II) bromide and hydrogen sulfide)

The overall balanced equation for the reaction is:

Fe + FeCl3 + H2 + S + 2HBr -> FeBr2 + FeS + 2HCl + H2S

d) FeCl2 + Na2CO3 -> Fe(NO3)3 + NaOH -> Fe2(SO4)3 + Ba(NO3)2 ->

The given reaction can be broken down into the following steps:

1. FeCl2 + Na2CO3 -> FeCO3 + 2NaCl (formation of iron(II) carbonate and sodium chloride) 2. FeCO3 + 2HNO3 -> Fe(NO3)2 + CO2 + H2O (formation of iron(II) nitrate, carbon dioxide, and water) 3. Fe(NO3)2 + 2NaOH -> Fe(OH)2 + 2NaNO3 (formation of iron(II) hydroxide and sodium nitrate) 4. 2Fe(OH)2 + H2SO4 -> Fe2(SO4)3 + 2H2O (formation of iron(III) sulfate and water) 5. Fe2(SO4)3 + 3Ba(NO3)2 -> 2Fe(NO3)3 + 3BaSO4 (formation of iron(III) nitrate and barium sulfate)

The overall balanced equation for the reaction is:

FeCl2 + Na2CO3 + 2HNO3 + 2NaOH + H2SO4 + 3Ba(NO3)2 -> Fe2(SO4)3 + 2Fe(NO3)3 + 3BaSO4 + CO2 + 3H2O