Potassium and chlorine react to form potassium chloride.

It is a redox reaction. Explain why.

Potassium and chlorine react to form potassium chloride.

Write the balanced half-equations for it.

Bromine displaces iodine from a solution of potassium iodide.

Write the balanced half-equations for this reaction.

Bromine displaces iodine from a solution of potassium iodide.

Write the balanced half- equations and add the half-equations, to give the ionic equation for the reaction.

Identify the oxidizing agent and reducing agent in the given reaction, by looking at the gain and loss of oxygen : 

$2{\mathrm{Mg}}_{\left(\mathrm{s}\right)}+{\mathrm{O}}_{2\left(\mathrm{g}\right)} \to 2{\mathrm{MgO}}_{\left(\mathrm{s}\right)}$

Identify the oxidising agent and reducing agent in the given reaction, by looking at the gain and loss of oxygen.

${\mathrm{Fe}}_2{\mathrm{O}}_{3\left(\mathrm{s}\right)}+3{\mathrm{CO}}_{\left(\mathrm{g}\right)} \to 2{\mathrm{Fe}}_{\left(\mathrm{l}\right)}+3{\mathrm{CO}}_{2\left(\mathrm{g}\right)}$