OCR A Level Chemistry A
OCR A Level Chemistry A Qualitative Analysis Exam Questions
Free OCR A Level Chemistry A exam questions on Qualitative Analysis, with mark schemes. Covers tests for ions including carbonate, sulfate, halide and ammonium ions.
Qualitative Analysis 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 Qualitative Analysis
This topic covers identifying ions.
What you need to know
- Anions Carbonates, sulfates and halides.
- Order of tests Carbonate, then sulfate, then halide.
- Cations Ammonium test with NaOH and litmus.
- Observations Describing precipitates and gases.
Common mistakes in Qualitative Analysis
- Using the wrong order of tests.
- Adding sulfuric acid in a sulfate test.
- Vague observations.
Try three Qualitative Analysis exam-style questions
1. Describe the test for sulfate ions. (2 marks)
Show the mark scheme answer
Add dilute HCl then barium chloride (1); a white precipitate forms (1).
2. Explain why carbonate is tested first. (1 mark)
Show the mark scheme answer
Carbonate would form a precipitate with barium ions.
3. Describe the test for ammonium ions. (2 marks)
Show the mark scheme answer
Warm with NaOH (1); ammonia gas turns damp red litmus blue (1).
Qualitative Analysis FAQs
What does this topic cover?
Tests for common ions.
Which practical links here?
Qualitative analysis of ions.
Why use nitric acid in halide tests?
To remove carbonate ions.
Revise this topic with flashcards: OCR A Level Chemistry A H432 Flashcards, with mark scheme answers for Anki and Quizlet.
