Reversible reactions (AQA GCSE Chemistry Combined Science): Flashcards

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Reversible reactions
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Reversible reactions

Products can react to make original reactants

Irreversible reactions

Products cannot easily change back to reactants

Arrow for normal reactions

A+B→C+DA + B \rightarrow C + D

Arrow for reversible reactions

A+B⇌C+DA + B \rightleftharpoons C + D

What split arrow (⇌\rightleftharpoons) shows

Reaction can go in both directions

Ammonium chloride when heated

Breaks down into ammonia and hydrogen chloride gases

Ammonium chloride reversible equation

NH4Cl⇌NH3+HClNH_4Cl \rightleftharpoons NH_3 + HCl

If forward is exothermic, backward is...

Endothermic

If forward is endothermic, backward is...

Exothermic

Energy amount in forward vs backward

Same amount, just opposite ways

Energy change removing water from copper sulfate

Endothermic (absorbs energy)

Energy change adding water to copper sulfate

Exothermic (releases energy)

Effect of lower temp on ammonia production

More ammonia produced

Effect of higher temp on ammonia production

Less ammonia produced

Colour of hydrated vs anhydrous copper sulfate

Blue (hydrated), white (anhydrous)

Explore AQA GCSE Chemistry Combined Science Revision Notes by Topics

Rate of Reaction

Reversibility & Equilibrium

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Rate of Reaction

Reversibility & Equilibrium

Explore AQA GCSE Chemistry Combined Science Quizzes by Topics

Rate of Reaction

Reversibility & Equilibrium

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Rate of Reaction

Reversibility & Equilibrium

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