2.1.11

Identifying Ions

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Flame Tests

Flame tests can identify metal ions. The following positive metal ions all burn with a characteristic colour:

Lithium (Li<sup>+</sup>)

Lithium (Li+)

  • Crimson flame.
Sodium (Na<sup>+</sup>)

Sodium (Na+)

  • Yellow flame.
Potassium (K<sup>+</sup>)

Potassium (K+)

  • Lilac flame.
Calcium (Ca<sup>2+</sup>)

Calcium (Ca2+)

  • Orange-red flame.
Copper (Cu<sup>2+</sup>)

Copper (Cu2+)

  • Green flame.
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1

Biology

1.1

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2

Chemistry

2.1

Practicals

2.1.1Salts2.1.2Neutralisation2.1.3Titration2.1.4Electrolysis2.1.5Electrolysis 22.1.6Rate of Reaction2.1.7Rate of Reaction 22.1.8Chromatography2.1.9Identifying Gases2.1.10Identifying Gases 22.1.11Identifying Ions2.1.12Carbonates, Halides & Sulfates2.1.13Flame Emission Spectroscopy2.1.14Water Purification2.1.15Water Purification 2
3

Physics

3.1

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3.1.1Specific Heat Capacity3.1.2Thermal Capacity & Insulation3.1.3Latent Heat3.1.4Resistance & Current3.1.5Resistance & Current 23.1.6Density3.1.7Density 23.1.8Force & Extension - Springs3.1.9Waves - Ripple Tank3.1.10Light3.1.11Light Reflection & Refraction3.1.12Radiation3.1.13Radiation 2

Practice questions on Identifying Ions

Can you answer these? Test yourself with free interactive practice on Seneca — used by over 10 million students.

  1. 1
    What are the correct flame test colours?True / false
  2. 2
    Why is it problematic for interpreting the results of a flame test if a sample is made up of multiple ions?Flashcard
  3. 3
    Which is the correct charge for the following metal ions?True / false
  4. 4
    In flame tests, what must the nichrome wire loop be submerged in to be cleaned?Multiple choice
  5. 5
    In flame tests, what colour must the Bunsen flame before the wire loop is held in it?Multiple choice
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Identifying Gases 2

Carbonates, Halides & Sulfates