AP Chemistryhardmcq1 pt
Which of these salts is most soluble?
A.MX₂ with Ksp = 1 × 10⁻⁸
B.MX with Ksp = 1 × 10⁻¹⁰
C.MX₃ with Ksp = 1 × 10⁻¹²
D.Cannot compare different formulas
Explanation
Core Concept
Compare molar solubilities: for MX₂, s = (Ksp/4)^(1/3) = (2.5 × 10⁻⁹)^(1/3) ≈ 1.4 × 10⁻³ M; for MX with Ksp = 1 × 10⁻¹⁰, s = 1 × 10⁻⁵ M; for MX₃ with Ksp = 1 × 10⁻¹², s = (Ksp/27)^(1/4) ≈ 4.4 × 10⁻⁴ M. MX₂ wins.
Correct Answer
AMX₂ with Ksp = 1 × 10⁻⁸
More Unit 7: Equilibrium practice questions
- mediumDoubling the volume of a gaseous equilibrium mixture does what?
- easyFor the reaction A(g) + B(g) ⇌ C(g), an equilibrium mixture contains 0.20 M A, 0.10 M B, and 0.40 M C. What is Kc?
- easyHow does the equilibrium constant for a reaction change when a catalyst is added?
- hardA mixture initially contains 2.0 M A. For 2A ⇌ B with K = 0.10, what is [B] at equilibrium (approximately)?
- hardThe equilibrium constant for a reaction is unitless. Why?
Practice more AP Chemistry questions with full explanations
Practice Unit 7: Equilibrium Questions →