The Equilibrium Constant Kp (OCR A-Level Chemistry A): Quizzes

📚Quizzes
Revision NotesModel AnswersQuizzesFlashcardsExam Questions
The equilibrium constant Kp
Sign up to keep practising.Create a free account to play more quizzes and track your progress.

Practise the questions

10 questions from this quiz

Show

Why is KpK_p more practical than KcK_c for gas-phase equilibria?

Pressure is easier to measure than conc.

A mixture has 20 mol N2N_2, 30 mol O2O_2, 50 mol CO2CO_2. What is mole fraction of O2O_2?

0.30

What must all mole fractions in a gas mixture always sum to?

1

If x(N2)x(N_2) = 0.25 and total pressure is 80 kPa, what is p(N2)p(N_2)?

20 kPa

Which species are included in a KpK_p expression?

Only gaseous species

For CaCO3(s)⇌CaO(s)+CO2(g)CaCO_3(s) \rightleftharpoons CaO(s) + CO_2(g), what is the KpK_p expression?

Kp=p(CO2)K_p = p(CO_2)

For N2(g)+3H2(g)⇌2NH3(g)N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g), what power is p(H2)p(H_2) raised to in KpK_p?

3

What is a homogeneous equilibrium?

All species in the same phase

What are the units of mole fraction?

No units (dimensionless)

Which notation is correct for partial pressures in KpK_p expressions?

p(gas)p(gas)

Explore OCR A-Level Chemistry A Revision Notes by Topics

Rates of Reactions

Equilibrium

Acids, Bases and pH

Buffers and Neutralisation

Enthalpy and Entropy

Redox and Electrode Potentials

Transition Elements

Explore OCR A-Level Chemistry A Model Answers by Topics

Rates of Reactions

Equilibrium

Acids, Bases and pH

Buffers and Neutralisation

Enthalpy and Entropy

Redox and Electrode Potentials

Transition Elements

Explore OCR A-Level Chemistry A Flashcards by Topics

Rates of Reactions

Equilibrium

Acids, Bases and pH

Buffers and Neutralisation

Enthalpy and Entropy

Redox and Electrode Potentials

Transition Elements

Explore OCR A-Level Chemistry A Exam Questions by Topics

Rates of Reactions

Equilibrium

Acids, Bases and pH

Buffers and Neutralisation

Enthalpy and Entropy

Redox and Electrode Potentials

Transition Elements

Join 100,000+ A-Level students studying Quizzes with us.

Select your subjects, and get access to A+ resources today.