Which of the following pairs of compounds would form a precipitate when their aqueous solutions...

Chemistry

WAEC 2021

Which of the following pairs of compounds would form a precipitate when their aqueous solutions are mixed?

A. NaCl and KNO\(_{3}\)
B. KCL and NaNO\(_{3}\)
C. K\(_{2}\)SO\(_{4}\) and BaCl\(_{2}\)
D. NH\(_{4}\)NO\(_{3}\) and CO\(_{3}\)

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Correct Answer: Option C

Explanation

when potassium sulfate is mixed with barium chloride a white precipitate of barium sulfate will be form. barium sulfate is slightly soluble in water, so it will precipitate out as a solid

BaCl2 + K2SO4 → BaSO4 + 2KCl

note; all substances are aqueous except BaSO4 which is solid

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Which of the following pairs of compounds would form a precipitate when their aqueous solutions...

Correct Answer: Option C

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