Half Equations & Ionic Equations (AQA GCSE Chemistry): Flashcards

Oxidation/reduction processes & how electrons transfer in redox

Loss of electrons

Gain of electrons

$\text{Na} \rightarrow \text{Na}^+ + e^-$

$\text{Cl}_2 + 2e^- \rightarrow 2\text{Cl}^-$

Electrons lost = electrons gained

Only species directly involved in reaction

Ions unchanged during reaction; omitted from ionic equation

Write balanced chemical equation

Separate aqueous compounds into ions

Identify & remove spectator ions

$\text{Na}^+$ and $\text{NO}_3^-$