1. Chemistry Cells and Half Cells

2. Definition An electrochemical cell controls the electron transfer to produce electrical energy A half cell comprises of an element in two oxidation states The electrode potential of the half cell indicates its tendency to lose or gain electrons

3. Example

5. The wire allows electrons to be transferred between the half cells

6. The salt bridge allows ions to be transferred between the half cells

7. A salt bridge can be made out of a strip of filter paper soaked in an aqueous solution of an ionic compound that doesn’t react with the half cell solutions

9. Metal ion/metal ion half cell Fe²⁺ (aq) + e⁻ ↔ Fe³⁺ (aq) Cell is made up of: A solution containing Fe²⁺ (aq) and Fe³⁺ (aq) ions of the same concentration Also known as Equimolar Inert platinum electrode with a connecting wire