AP Chemistryeasymcq1 pt
A system at equilibrium has Q = 4.2 and K = 4.2. What is happening?
A.No net change — the system is at equilibrium
B.Products are forming
C.Reactants are forming
D.The reaction has stopped
Explanation
Core Concept
Q equals K by definition at equilibrium, so forward and reverse rates match and concentrations hold steady.
Correct Answer
ANo net change — the system is at equilibrium
More Unit 7: Equilibrium practice questions
- mediumDoubling the volume of a gaseous equilibrium mixture does what?
- hardWhich of these salts is most soluble?
- 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)?
Practice more AP Chemistry questions with full explanations
Practice Unit 7: Equilibrium Questions →