Positve ions - Metal Hydroxides (Edexcel GCSE Chemistry Combined Science): Flashcards

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8.3.2 Metal Hydroxides
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Reagent used to identify metal ions in solution

Sodium hydroxide (NaOH)

Ion from NaOH that reacts with metal ions

Hydroxide ions (OH−OH^-)

Solubility of metal hydroxides

Usually insoluble

Form of metal hydroxides when they appear in solution

Solid precipitates

Colour of Ca(OH)2Ca(OH)_2 precipitate

White

Colour of Mg(OH)2Mg(OH)_2 precipitate

White

Colour of Al(OH)3Al(OH)_3 precipitate

White

Behaviour of Al(OH)3Al(OH)_3 in excess NaOH

Dissolves, forming colourless solution

Colour of Cu(OH)2Cu(OH)_2 precipitate

Blue

Colour of Fe(OH)2Fe(OH)_2 precipitate

Green

Colour of Fe(OH)3Fe(OH)_3 precipitate

Brown

How metal ions are identified with NaOH

By colour of precipitate formed

Explore Edexcel GCSE Chemistry Combined Science Revision Notes by Topics

Separating mixtures

Identifying gases

Water

Positive ions - Flame Tests

Positve ions - Metal Hydroxides

Identifying negative ions - Carbonates test

Negative ions- Sulphate test

Negative ion- Halide Test

Tests for cations

Tests for anions

Show more

Tests for cations

Tests for anions

Explore Edexcel GCSE Chemistry Combined Science Model Answers by Topics

Separating mixtures

Identifying gases

Water

Positive ions - Flame Tests

Positve ions - Metal Hydroxides

Identifying negative ions - Carbonates test

Negative ions- Sulphate test

Negative ion- Halide Test

Tests for cations

Tests for anions

Show more

Tests for cations

Tests for anions

Explore Edexcel GCSE Chemistry Combined Science Quizzes by Topics

Separating mixtures

Identifying gases

Water

Positive ions - Flame Tests

Positve ions - Metal Hydroxides

Identifying negative ions - Carbonates test

Negative ions- Sulphate test

Negative ion- Halide Test

Tests for cations

Tests for anions

Show more

Tests for cations

Tests for anions

Explore Edexcel GCSE Chemistry Combined Science Exam Questions by Topics

Separating mixtures

Identifying gases

Water

Positive ions - Flame Tests

Positve ions - Metal Hydroxides

Identifying negative ions - Carbonates test

Negative ions- Sulphate test

Negative ion- Halide Test

Tests for cations

Tests for anions

Show more

Tests for cations

Tests for anions

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