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  • Sodium carbonate cannot be used in place of ammonium carbonate for the precipitation of the fifth group radicals becauseOption: 1 Sodium ions interfe

Sodium carbonate cannot be used in place of ammonium carbonate for the precipitation of the fifth group radicals because

Option: 1

Sodium ions interfere with the detection of fifth group radicals


Option: 2

Concentration of carbonate ions is very low


Option: 3

Sodium will react with acidic radicals


Option: 4

Magnesium will be precipitated


Answers (1)

best_answer

As we have learnt, 

(\text{NH}_{4})_{2}\text{CO}_{3} is a weak electrolyte and the concentration of \text{CO}_{3}^{2-} is comparatively low. \text{Na}_{2}\text{CO}_{3} is a strong electrolyte  and thus the concentration of \text{CO}_{3}^{2-} increases. So, \text{Mg}^{2+} will be precipitated along with other Group V basic radicals.

Hence, the correct answer is Option (4)

Posted by

Gunjita

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