OCR A Level Chemistry A
OCR A Level Chemistry A Rates, Equilibrium and pH Exam Questions
Free OCR A Level Chemistry A exam questions on Rates, Equilibrium and pH, with mark schemes. Covers rate equations, orders, Kc and Kp, pH, Ka, buffers and titration curves.
Rates, Equilibrium and pH exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
StemUp mark scheme flashcards
OCR A Level Chemistry A H432 Flashcards (Anki & Quizlet)
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Use them on Anki or Quizlet, then test yourself with the questions on this page.
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About OCR A Level Chemistry A Rates, Equilibrium and pH
This topic covers physical chemistry in depth.
What you need to know
- Rates Rate equations, orders and rate constants.
- Equilibrium Kc and Kp calculations.
- pH Strong and weak acids and Kw.
- Buffers Composition, action and calculations.
Common mistakes in Rates, Equilibrium and pH
- Using balanced equation coefficients as orders.
- Forgetting to square [H⁺].
- Wrong Kp units.
Try three Rates, Equilibrium and pH exam-style questions
1. Calculate the pH of 0.010 mol dm⁻³ HCl. (1 mark)
Show the mark scheme answer
2.0.
2. Explain what a buffer is. (1 mark)
Show the mark scheme answer
A solution that minimises pH changes on adding small amounts of acid or base.
3. State the effect of temperature on k. (1 mark)
Show the mark scheme answer
Increasing temperature increases k.
Rates, Equilibrium and pH FAQs
What does this topic cover?
Rate equations, equilibrium constants, pH and buffers.
Which practical links here?
Rates by continuous monitoring and pH titration curves.
What is the Arrhenius equation?
k = Ae^(−Ea/RT).
Revise this topic with flashcards: OCR A Level Chemistry A H432 Flashcards, with mark scheme answers for Anki and Quizlet.
