2. Electrochemical cells

• What is an electrochemical cell made of ?

  2 half cells joined by a wire, voltmeter and a salt bridge

  
• When we connect 2 half cells, what happens ?

  One side undergoing reduction and other side undergoing oxidation. Redox reaction
• How does electrons flow in an electrochemical cell ?

  from a more reactive metal to a less reactive metal
• what is it called when we measure the voltage between the two half cells?

  EMF or E cell
• What is the salt bridge saturated with ?

  KNO3 solution
• Why is a salt bridge used ?

  to allow ions to flow through which balances charges