an unknown salt when heated with buses flame produced a bright-yellow flame.an aqueous solution of this salt when reacted with dilute HCl related a gas turns lime water milky. upon addition of calcium chloride solution to an aqueous solution of salt ,a white precipitate is formed. what is the unknown salt?
Sodium gives a bright-yellow flame.
The gas that turns lime water milky is CO2.
White precipitate formed upon addition of calcium chloride is CaCO3.
Unknown salt = Na2CO3.
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