IAL Chemistry 14B.2–14B.3 Buffer solutions

Exam-style practice questions with a full mark scheme, a student self-assessment sheet and a subtitled summary video for 14B.2–14B.3 Buffer solutions, written for Pearson Edexcel International A Level (A2) Chemistry Unit 4 (WCH14): Rates, Equilibria and Further Organic Chemistry.

What’s included

• Practice questions (20 marks): 2 multiple-choice questions; short-answer and “explain” questions; 4 structured calculations with method marks; an extended 4-mark question. The questions build from accessible recall up to stretch questions, with answer lines and marks shown.
• Mark scheme: one mark per point in exam-board style, with allow / ignore / do-not-allow notes and fully worked calculations.
• Self-assessment sheet: “I can…” statements linked to each question, with marks and Not yet / Nearly / Got it ratings, score bands telling students what to do next, and a “my mistakes and how I will fix them” table.
• Summary video (MP4, 5:02): an animated revision summary of the topic with on-screen subtitles, worked examples, an exam-tip card and key points. Ideal for flipped learning, homework or revision before students attempt the questions.

Students practise how to

• Say what a buffer is and recognise one.
• Explain how a buffer works, with one equation for added H⁺ and one for added OH⁻.
• Calculate the pH of a buffer, including after mixing two solutions.
• Calculate the new pH after acid or alkali is added to a buffer.
• Explain how blood is buffered.
• Work out how to make a buffer with a chosen pH.

Follows the order of the Student Book 2 headings (14B.2–14B.3). The Word document is fully editable. The questions are original and not taken from past papers.

Suitable for: classwork, homework, flipped learning, independent revision, and EAL learners (the subtitled video and clear command words support them).

Files: 1 × Word document (.docx), 1 × video (.mp4). The video narration uses a computer-generated voice.