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

Oxidation or reduction processes in redox reactions

How electrons are transferred

Loss of electrons

Gain of electrons

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

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

Electrons lost must equal electrons gained

Only species directly involved in the reaction

Ions that don't change during the reaction

They are omitted

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

$\text{Ag}^+ (aq) + \text{Cl}^- (aq) \rightarrow \text{AgCl} (s)$