AP Chemistrymediummcq1 pt
In which pair does a precipitate form when aqueous solutions are mixed?
A.Pb(NO₃)₂ and KI
B.NaNO₃ and KCl
C.K₂SO₄ and NaCl
D.NH₄NO₃ and Na₂CO₃
Explanation
Core Concept
Pb²⁺ and I⁻ combine to PbI₂, which is insoluble, so a yellow precipitate appears. Solubility rules make lead halides (except with F⁻) insoluble.
Correct Answer
APb(NO₃)₂ and KI
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