Question

write a reaction for the reaction of 1) iron with stem 2) calcium with water 3) potassium with water​

Answer 1

$\bold \pink{ANSWER}$

(i) Iron react with steam to form the metal oxide and hydrogen.

• 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g)
• (ii) The reaction of calcium with water is exothermic but the heat evolved is not sufficient for the hydrogen to catch fire.
• Ca(s) + 2H2O(l) → Ca(OH)2(aq) + H2(g)

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Answer 2

Answer:

(i) Iron react with steam to form the metal oxide and hydrogen.

3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g)

(ii) The reaction of calcium with water is exothermic but the heat evolved is not sufficient for the hydrogen to catch fire.

Ca(s) + 2H2O(l) → Ca(OH)2(aq) + H2(g)

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