The oxide of the most reactive metal is represented by the formula X2O.
(i) What will be the formula of the carbonate of the metal?
(ii) Identify the metal and write the balanced chemical reaction of the formation of the above oxide.
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Answer:
Explanation:
Since the oxide turns red litmus blue, therefore X is a metal because it is an alkaline oxide.
Most of the metals form respective metal oxides when react with oxygen.
Metal + Oxygen → metal oxide
Examples: (1) Reaction of potassium with oxygen:- Potassium metal forms potassium oxide when reacts with oxygen.
4K+O
2
→2K
2
O
(2) Reaction of sodium with oxygen:- Sodium metal forms sodium oxide when reacts with oxygen.
4Na+O
2
→2Na
2
O
Most metal oxides are insoluble in water but some of these dissolve in water to form alkalis. Sodium oxide and potassium oxide dissolve in water to produce alkalis.
Na
2
O(s)+H
2
O(l)→2NaOH(aq)
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