A) 2.15 g
B) 2.48 g
C) 2.32 g
D) 2.64 g
Correct Answer: A
Solution :
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 \[A{{g}_{2}}(s)\xrightarrow[{}]{Heat}2Ag(s)+C{{O}_{2}}(g)+\frac{1}{2}{{O}_{2}}(g)\] \[MW=276g\] \[2\times 108=216g\] Hence, 2.76 g of \[A{{g}_{2}}C{{O}_{3}}\]oh heating will give \[\frac{216}{276}\times 2.75=2.16g\] Ag as residue.
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