Write equations for the reactions of
(i) iron with steam
(ii) calcium and potassium with water
(I)
3
F
e
+
4
H
2
O
Δ
⇐⇒
F
e
3
O
4
+
4
H
2
(II)
C
a
+
2
H
2
O
→
C
a
(
O
H
)
2
+
H
2
,
2
K
+
2
H
2
O
→
2
K
O
H
+
H
2
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