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2 June, 20:52

How can we determine which compound was present in a container labelled KNO3 or K2CO3 or KNO2?

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  1. 2 June, 22:26
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    The reaction of K₂CO₃ will vinegar solution, evolves carbon dioxide gas.

    But the other two compounds KNO₃ and KNO₂ does not evolve carbon dioxide on reaction with vinegar.

    The reaction of KNO₂ with sulfuric acid gives, a brown gas, of nitrogen dioxide.

    And the rest two compounds, K₂CO₃ and KNO₃, does not react with sulfuric acid.
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