Which of the following pairs of compounds would form a pr...
Which of the following pairs of compounds would form a precipitate when their aqueous solutions are mixed?
NaCl and KNO3
KCL and NaNO3
K2SO4 and BaCl2
NH4NO3 and CO3
Correct answer is C
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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