Equilibrium Constants & Reaction Quotients — Drills · Grade 11 Science
Chapter: Rates & EquilibriumWhat these drills covers
By the end of Equilibrium Constants & Reaction Quotients you should be able to:
- I can form K and Q expressions with phases and coefficients considered.
- I can predict net adjustment and solve a simple equilibrium composition.
2 questions, numeric and written answer, each with a worked explanation.
Vocabulary used: reaction quotient Q, ICE table.
Problem 1
For A⇌B, [A]=.20 M and [B]=.60 M at equilibrium. Find K.
Hints
Write the relationship first; substitute with consistent units.
Answer and explanation
3
K=.60/.20.
Problem 2
Why omit a pure solid from a simple K expression?
Answer and explanation
Its activity is approximately constant while that pure phase is present.
Response criteria
- State a scientifically accurate conclusion.
- Show the calculation or mechanism that supports it.
- Include units, conditions, or limits where relevant.