Some Basic Concepts Of Chemistry Question 135

Question: 2.76 g of silver carbonate on being strongly heated yields a residue weighing

Options:

A) 2.15 g

B) 2.48 g

C) 2.32 g

D) 2.64 g

Show Answer

Answer:

Correct Answer: A

Solution:

[a] Unlike other metal carbonates that usually decomposes into metal oxides, liberating carbon dioxide, silver carbonate on heating decomposes into elemental silver liberating mixture of carbon dioxide and oxygen gas as Ag2(s)Heat2Ag(s)+CO2(g)+12O2(g)

MW=276g 2×108=216g Hence, 2.76 g of Ag2CO3 oh heating will give 216276×2.75=2.16g Ag as residue.



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