UNIT 06 : CHEMICAL EQUILIBRIUM
Chemical Equilibrium is a core scoring chapter in MDCAT Chemistry, sitting within the 25% Chemistry allocation (45 questions) of your 180-question paper.
What this chapter covers:
- Chemical equilibrium defined in terms of reversible reactions
- Forward and reverse reactions, with their macroscopic characteristics
- Le Chatelier’s principle and its application to changes in concentration, pressure, temperature, or addition of catalyst
- Solubility products
- Common ion effect
- Buffer solutions and their types
- Synthesis of ammonia by Haber’s process
This chapter blends conceptual reasoning with quantitative problem-solving, covering everything from the dynamic nature of equilibrium, placing it across the easy-to-moderate range with pockets of difficult numerical application, in line with the exam’s overall 15-70-15 difficulty split.
Success here depends on internalizing both the qualitative logic of equilibrium shifts and the precise handling of equilibrium constant expressions and buffer calculations.
Why this practice set helps:
- Covers every subtopic the PMDC curriculum identifies, plus the supporting concepts textbooks present alongside them
- Every question includes a full explanation of why the correct answer is right and why each other option is wrong
- Built to help you learn faster than passive reading, with nothing the exam may draw from left untouched
Work through this set attentively, and you build both the conceptual clarity on equilibrium shifts and the calculation precision on Kc, Ksp, and buffer pH that this chapter demands.