Required Practical: Preparation of a Soluble Salt (AQA GCSE Chemistry): Flashcards

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Required Practical: Preparation of a Soluble Salt
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Soluble salts

Dissolve in water

Insoluble salts

Precipitate out, form solid crystals at bottom

Acid used to prepare CuCl2CuCl_2

HClHCl (hydrochloric acid)

Metal base used with HClHCl

CuOCuO (copper(II) oxide)

Product of HClHCl + CuOCuO reaction

CuCl2CuCl_2 (copper(II) chloride)

Why heat HClHCl in preparation

Increases reaction rate

Sign all HClHCl has reacted

Excess CuOCuO remains undissolved

First filtration purpose

Remove unreacted excess CuOCuO

Why evaporate water

Increase CuCl2CuCl_2 concentration

Crystallisation definition

Formation of crystals as solution cools

Equation: HClHCl + CuOCuO

2HCl+CuO→CuCl2+H2O2HCl + CuO \rightarrow CuCl_2 + H_2O

Why use excess CuOCuO

Ensures all acid is neutralised

What filtration does

Separates solids from liquids

Final step after crystallisation

Filter and dry the crystals

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Reactivity of Metals

Reactions of Acids

Electrolysis

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Reactivity of Metals

Reactions of Acids

Electrolysis

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Reactivity of Metals

Reactions of Acids

Electrolysis

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Reactivity of Metals

Reactions of Acids

Electrolysis

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