Required Practical: Preparation of a Soluble Salt (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards

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Required Practical: Preparation of a Soluble Salt
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What soluble salts do in water

Dissolve

What insoluble salts do in solution

Precipitate out/form solid crystals

Reactants to make copper(II) chloride

HClHCl and CuOCuO

Product of HClHCl + CuOCuO reaction

Copper(II) chloride (CuCl2CuCl_2)

Type of substance CuOCuO is

Insoluble metal base

Why HClHCl is heated in this practical

Increases reaction rate

Sign all HClHCl has reacted

Excess CuOCuO remains undissolved

Why filter after adding CuOCuO

Remove unreacted excess CuOCuO

Purpose of evaporating water

Increase concentration of salt

What happens during crystallisation

Crystals form as solution cools

Equation for HClHCl + CuOCuO reaction

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

Why use excess CuOCuO

Ensures all acid is neutralised

Purpose of filtration

Separate solids from liquids

Final steps after crystals form

Filter and dry the crystals

Products of acid + metal oxide

Salt and water

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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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