Creative Problem Solving in Chemistry - Five white solids

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Label five white solids correctly by using chemical tests and any suitable apparatus.

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Five white solids
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Using the problems
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Level

Use

Specification

Wales
- A/AS level
  - WJEC Chemistry
    - Unit 1: THE LANGUAGE OF CHEMISTRY, STRUCTURE OF MATTER AND SIMPLE REACTIONS
      - 1.6 The Periodic Table
        (f) reactions of the aqueous cations Mg²⁺, Ca²⁺ and Ba²⁺ with OH⁻, CO₃²⁻ and SO₄²⁻ ions
        (g) characteristic flame colours shown by compounds of Li, Na, K, Ca, Sr and Ba (Mg compounds show no colour)
        (j) trends in solubility of Group 2 hydroxides and sulfates
        (o) reaction between aqueous Ag⁺ and halide ions followed by dilute aqueous NH₃
Northern Ireland
- A/AS level
  - CCEA Chemistry
    - Unit AS 3: Basic Practical Chemistry
      - use chemical tests listed in ‘Qualitative tests’ to identify unknown substances;
    - Unit AS 1: Basic Concepts in Physical and Inorganic Chemistry
      - 1.10 Qualitative tests
        1.10.3a use cation tests, including: flame tests to identify the metal ions Li⁺, Na⁺, K⁺, Ca²⁺, Ba²⁺ and Cu²⁺; and
        1.10.3b adding sodium hydroxide solution and warming to identify ammonium ion.
        1.10.4a use anion tests, including: adding barium chloride solution to identify sulfate ion;
        1.10.4b adding acidified silver nitrate solution to distinguish between chloride, bromide and iodide (followed by adding dilute and concentrated ammonia solution); and
        1.10.4c adding dilute acid to test for carbonate ion and identifying the gas produced; and
- GCSE
  - CCEA Chemistry
    - Unit 1: Structures, Trends, Chemical Reactions, Quantitative Chemistry and Analysis
      - 1.9 Chemical analysis
        1.9.16 write ionic equations for the halide and sulfate ion tests and tests for metal ions using sodium hydroxide solution;
Republic of Ireland
- Leaving Certificate
  - Chemistry
    - 2. Chemical bonding
      - 2.2 Ionic Bonding
        Activities
        Mandatory experiment 2.1 - Tests for anions in aqueous solutions: chloride, carbonate, nitrate, sulfate, phosphate, sulfite, hydrogencarbonate.
    - 9. Environmental chemistry: water
      - 9.1 pH Scale
        Depth of treatment
        pH of weak acids and bases.
        Activities
        Calculation of pH of dilute aqueous solutions of strong acids and bases (calculation of pH of mixtures of strong acids and bases not required).
England
- A/AS level
- GCSE
Scotland
- National 5
  - SQA Chemistry
    - Chemical changes and structure
      - Acids and bases
        Neutralisation reactions
        2H⁺(aq) + CO₃²⁻(aq) → H₂O(l) + CO₂(g) for aqueous metal carbonates
        2H⁺(aq) + CO₃²⁻(s) → H₂O(l) + CO₂(g) for insoluble metal carbonates

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Creative Problem Solving in Chemistry - Five white solids

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Five white solids

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