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A solid was found to be highly soluble in water. Treating separate portions of a

ID: 821064 • Letter: A

Question

A solid was found to be highly soluble in water. Treating separate portions of a solution of this solid with aqueous solutions of NaCl, NaBr, NaI, Na2SO4, Na2CO3, Na3PO4, NaOH, and Na2S produced no precipitates. Treatment of an aqueous solution of this solid with acid resulted in the formation of an odorless gas. This solid could be:

A solid was found to be highly soluble in water. Treating separate portions of a solution of this solid with aqueous solutions of NaCl, NaBr, NaI, Na2SO4, Na2CO3, Na3PO4, NaOH, and Na2S produced no precipitates. Treatment of an aqueous solution of this solid with acid resulted in the formation of an odorless gas. This solid could be:

PbSO3
KBr
Li2CO3
(NH4)2S
both PbSO3 and Li2CO3

Explanation / Answer

Li2CO3

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