Preparations of solutions: 1. 1000 cm3 of 0.0020 M NaBH4(aq): Weigh 0.076 g of NaBH4(s) and dissolve it in deionised water to volume in a 1000 cm3 volumetric flask. 2. 1000 cm3 0.0010 M AgNO3(aq): Weigh 0.17 g of AgNO3(s) and dissolve it in deionised water to volume in a 1000 cm3 volumetric flask. 3. 200 cm3 of saturated NaCl(aq): Add excess amounts of NaCl(s) into 200 cm3 of deionised water. Note: the sodium borohydride solution must be freshly prepared before the experiment session starts.