1.

When aqueous solutions of two salts are mixed , the third salt formed may appear as a solid precipitate or a clear solution depending upon the solubility of its ions . It is observed that all salts of Na , K , NH_(4) are soluble . All nitrates and bicarbonates are also soluble . All halides (chlorides , bromides , iodides) are soluble except those of Ag , Hg (I) and Pb . Which one among the following combinations of solutions will produce a solid precipitate ?

Answer»

Sodium sulphate and barium chloride
Magnesium sulphate and barium BICARBONATE
Lithium IODIDE and barium chloride
Ammonium sulphate and potassium bromide

Solution :ACCORDING to this given data
`underset("sulphate")underset("Sodium") (Na_(2)SO_(4)) + underset("chloride")underset("Barium")(BaCl_(2)) to underset("(SOLUBLE)")(2NaCl) + underset(("ppt"))(BaSO_(4)) darr`
`underset("sulphate")underset("Magnesium")(MgSO_(4)) + underset("bicarbonate")underset("Barium")(Ba(HCO_(3))_(2)) to Mg underset(("Soluble"))((HCO_(3))_(2)) + underset((ppt))(BaSO_(4)) darr`
Both the above given combinations of solution will produce a precipitate of `BaSO_(4)`. Hence , option (a) white and (b) both are correct ANSWER.


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