7.6 Properties of the Equilibrium Constant

01Manipulating K

Reverse the reaction → K becomes 1/K. Multiply coefficients by n → Kⁿ. Add reactions → multiply their K values.

Compare to Hess's law where ΔH values add.

Reverse: 1/K · Multiply by n: Kⁿ · Add: K₁ × K₂.

Worked example: A ⇌ B, K = 4. 2B ⇌ 2A → (1/4)² = 1/16.

Key takeaways

Quick check

1.K = 100. Reverse reaction K?

2.Halve all coefficients, K = 25 → ?

3.Adding two reactions with K₁ and K₂ gives…