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Which one of the following is the correct molecular formula of ammonium carbonate if the valency of ammonium ion is (+1) and carbonate anion is (-2)?

Which one of the following is the correct molecular formula of ammonium carbonate if the valency of ammonium ion is (+1) and carbonate anion is (-2)? Correct Answer (NH<sub>4</sub>)<sub>2</sub>CO<sub>3</sub>

Explanation:

Ammonium Carbonate:

  • Ammonium carbonate is a white solid crystalline powder with a strong odour of ammonia.
  • It is considered an acidic salt.
  • It has a boiling point of 520°C and a melting point of 58°C.
  • It is used to make baking powder, smelling salt etc.
  • It is found to be soluble in water.
  • It undergoes a neutralization reaction with most of the bases.
  • Ammonium carbonate decomposes when heated into hydrochloric acid and ammonia,
  • It has a symbolic representation of (NH4)CO3.
  • Its molar mass is equal to 96.09 g/mol.

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Calculation:

Ammonium carbonate is formed by two sets of ions

Cation of ammonium ion (NH4+)  and anion of carbonate (CO32-)

The charge on ammonium  ion (NH4+) is +1 and that of carbonate (CO32-) is -2, thus

The molecular formula will be (NH4+)  x 2 = +2 and    (CO32-) x 1 = -2

Here, +2 and -2 charges will balance each other to form (NH4)CO3.

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