Sarthaks Test
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Write balanced equations for the reactions of: 

i. Iron with steam, 

ii. Calcium and potassium with water

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(I) Reaction of iron with steam: 

When red hot iron interacts with steam, formation of Iron (II, III) oxide and hydrogen takes place. 

3Fe(s) + 4H2O(g) ⇾Fe3O4 (s)+ H2(g) 

(II) Reaction f calcium with water:

Calcium reacts with cold water to form calcium hydroxide and hydrogen gas. 

Ca(s) + 2H2O(l) ⇾Ca(OH)2(aq.) + H2(g) 

(III) Reaction of potassium with water:

Potassium reacts violently with cold water to produce potassium hydroxide and hydrogen gas. During the process, much heat is generated and hydrogen rapidly burns. 

2K(s) + 2H2O (l) ⇾2KOH (aq.) +H2 (g) + heat

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1 . Reaction of iron with steam : 

3Fe(s) + 4H2O(g) Fe3O4(aq)+ 4H2 (g)                                                    

• Ferrous react with Steam to form iron / ferric oxide and liberates hydrogen gas .

2 . Reaction of clacium with water :

Ca(s) + H2O(l) → Ca(OH)2(aq) + H2(g)

• Calcium reacts with water and produce Calcuim hydroxide and liberates Hydrogen gas .

3 . Reaction of Potassium with water :

2K (s) + 2H2O(l) → 2KOH(aq) + H2(g) + Heat

• Potassium reacts with water vigorously and produces Potassium hydroxide and hydrogen gas with large amount of heat .

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