Cells, Batteries and Hydrogen Fuel Cells

Cells and Batteries – Revision Notes

Opposite to electrolysis

Electrolyte – metal ion solution

Electrodes – two metals of different reactivity

What size voltage?

• Bigger difference in metal reactivity

• More concentrated electrolyte

Determining Voltage

• Highest voltage means most reactive

• Two electrodes of same metal gives 0V

• Swapping electrodes changes sign of voltage (+ or -)

• Calculating voltage of two electrodes that are compared to a common electrode: voltage = voltage of most reactive…