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What do you observe in activity given in the figure? What are the causes of these observations explain giving reaction ?

Answer»

Solution :Due to REACTION of SODIUM carbonate with DILUTE hydrochloric acid , CARBON dioxide gas is produced . Lime water tirned milky when `CO_(2)` is passed through it, due to the formation of calcium carbonate.
`Na_(2)CO_(3)+2HClrarr2NaCl+CO_(2)`
`CA(OH)_(2)+CO_(2)rarrCaCO_(3)+H_(2)O`


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