8 - EMF OF ELECTROCHEMICAL CELL

• METHOD?

  1. Clean two strips of metal using emery paper
  2. Place each metal in a 100 cm^3 beaker containing 50 cm^3, 1 moldm^-3 conjugate solution
  3. Join beakers with a strip of filter paper saturated with NaCl solution
  4. Connect metals using crocodile clips and leads to voltmeter
  5. Read off voltage
• WHAT MAY HAPPEN TO A METAL ELECTRODE PRIOR TO USAGE?

  rubbed with sandpaper to remove oxide layer on surface
• REQUIREMENT OF SOLUBLE IONIC COMPOUND USED TO MAKE SALT BRIDGE?

  must not react with electrolyte/ ions in solution