AP Chemistryhardmcq1 pt
The equilibrium constant for a reaction is unitless. Why?
A.Concentrations are divided by standard reference concentrations
B.Units always cancel by accident
C.K has units of M
D.Chemists ignore units
Explanation
Core Concept
Each concentration is normalized by 1 M (or 1 atm), canceling all units. K is a ratio of dimensionless activities.
Correct Answer
AConcentrations are divided by standard reference concentrations
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 →