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Will a double-replacement reaction occur?

publish date: 2024/01/09 15:38:54.713824 UTC

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Ca(NO₃)₂ + KBr → ?

Yes

Correct Answer

Explanation

According to the solubility rules, both Ca(NO₃)₂ and KBr are soluble. Now we consider what the double-replacement products would be by switching the cations (or the anions)—namely, CaBr₂ and KNO₃. However, the solubility rules predict that these two substances would also be soluble, so no precipitate would form. Thus, we predict no reaction in this case.

These compounds generally dissolve in water (are soluble):	Exceptions:
All compounds of Li⁺, Na⁺, K⁺, Rb⁺, Cs⁺, and NH₄⁺	None
All compounds of NO₃^- and C₂H₃O₂^-	None
Compounds of Cl^-, Br^-, I^-	Ag⁺, Hg₂²⁺, Pb²⁺
Compounds of SO₄²	Hg₂²⁺, Pb²⁺, Sr²⁺, Ba²⁺

These compounds generally do not dissolve in water (are insoluble):	Exceptions:
Compounds of CO₃^2- and PO₄^3-	Compounds of Li⁺, Na⁺, K⁺, Rb⁺, Cs⁺, and NH₄⁺
Compounds of OH^-	Compounds of Li⁺, Na⁺, K⁺, Rb⁺, Cs⁺, NH₄⁺, Sr²⁺, and Ba²⁺

Reference

Beginning Chemistry v. 1.0

Quizzes you can take where this question appears

Single- and Double-Displacement Reactions