Question

write the equation for the reaction of i)iron with steam ii)calcium with water iii) potassium with water​

Answer 1

Answer:

i 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g)

ii Ca(s) + 2H2O(l) → Ca(OH)2(aq) + H2(g)

iii 2K(s) + 2H2O(l) → 2KOH(aq) + H2(g) + heat energy

Answer 2

Answer:

i) 2Fe + 3H2O(steam) - Fe2O3 + 3H2(gas )

ii) Ca + 2H2O(cold water) - Ca(OH)2 + H2 (gas)

iii) K + H2O(cold water) - KOH + H2 ( gas )

Explanation:

iron reacts only with hot water or steam to give oxide of it and hydrogen ....

calvium and potassium react only with cold water to give hydroxide and hydrogen.....

HOPE IT HELPS....