Equipment 100g balance, 25mL graduated cylinder, 100mL graduated cylinder, 250mL graduated cylinder, magnetic stirring hot plate, 1500mL Pyrex beaker, four 500mL Pyrex beakers, 250mL Pyrex beaker, petri dish Solution A: 800mL water, 60 gm NaBrO3, 24 mL concentrated H2SO4 Solution B: 25g Malonic acid, 250 mL water Solution C: 0.5g o-phenanthroline, 1.0g hydrated ferrous ammonium sulfate, 100mL water Procedure Mix together 180mL Solution A, 130mL water, 30mL Solution B, and 10mL Solution C. Stir continuously. Produces a red solution that at 25C flashes blue every ca. 18 seconds for approximately 1h 15min. |