Reversibility & Equilibrium (OCR GCSE Chemistry A (Gateway Science Suite)): Quizzes

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Reversible Reactions
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What is a key feature of non-reversible reactions?

They proceed in one direction only

Which arrow symbol represents a non-reversible reaction?

Single arrow (→)

Why is the vinegar and sodium hydrogen carbonate reaction non-reversible?

CO2CO_2 gas leaves the reaction

What can occur in reversible reactions?

Forward and backward directions

In reversible reactions, what can products do?

React to regenerate reactants

Which arrow symbol indicates a reversible reaction?

Double arrow (⇌)

Is the reaction H2+I2⇌2HIH_2 + I_2 ⇌ 2HI reversible or non-reversible?

Reversible

What is the forward reaction for the H2H_2 and I2I_2 system?

H2+I2→2HIH_2 + I_2 → 2HI

What is the backward reaction in the H2H_2 and I2I_2 system?

2HI→H2+I22HI → H_2 + I_2

Why use a double arrow instead of two separate equations?

To simplify notation

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Reversibility & Equilibrium

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