Chapter 3: Qualitative Inorganic Analysis

A-level ChemistryModule 3: Periodic Table & Energy6 topicsHigher

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Releases 1 August 2026

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Module 3: Periodic Table and Energy: Qualitative Inorganic Analysis - Authored Long Answer Questions

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4 questions25 marks37.5 min

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6 marksdescribestandardOCR A

For Qualitative Inorganic Analysis, describe how selective precipitation and confirmatory ion tests applies to sodium hydroxide testing of Fe3+, Cu2+ and Al3+ samples.

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6 markscalculatehardOCR A

Using sodium hydroxide testing of Fe3+, Cu2+ and Al3+ samples, calculate a relevant OCR A Qualitative Inorganic Analysis quantity and explain the physical or chemical meaning of the answer. Show equation, substitution, answer and unit.

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7 marksexplainhardOCR A

Qualitative Inorganic Analysis: Sodium hydroxide volume (cm3) vs Precipitate absorbance at 620 nm (%)

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The graph for Qualitative Inorganic Analysis shows data from sodium hydroxide testing of Fe3+, Cu2+ and Al3+ samples. Explain the pattern using the data and relevant chemistry principles.

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6 marksevaluatestandardOCR A

In sodium hydroxide testing of Fe3+, Cu2+ and Al3+ samples, evaluate the experimental method or model assumptions used when applying selective precipitation and confirmatory ion tests.

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Key learning objectives

Understand the key principles behind Qualitative Inorganic Analysis.
Apply these ideas to exam-style questions.
Recall the essential definitions and key terms.