Electrochemical Cells Essay

804 WordsNov 23, 20114 Pages
Year 11 Chemistry Electrochemical Cells Purpose To determine the order of reactivity for the metals copper, iron, lead and zinc using the least amount of electrochemical cells as possible. Materials List • Four 100ml beakers • 4 strips of filter paper approximately 15cm in length • Voltmeter • Sodium Chloride solution at 10% concentration • Zinc, Copper, Lead and Iron metal strips (approximately 10 cm) • 50 ml of Copper sulphate, Zinc sulphate, Lead nitrate and Iron nitrate solutions • Scissors Procedure - Place the 50ml solution of zinc sulphate in a 100ml beaker, and 50ml solution of copper sulphate in a different 100ml beaker. Place the zinc metal strip in the zinc sulphate beaker and the copper metal strip with the copper sulphate beaker. - Soak one of the filter paper strips in the sodium chloride solution, making sure 100% of the surface has been covered. Place one end of the filter paper in the zinc sulphate solution and the other end in the copper sulphate solution (making sure the filter paper is not touching the metals) - Using the voltmeter, touch both metals with the connecting wires so there is positive reading. Record the voltage, anodic metal and cathodic metal. - Repeat this process using an Iron metal strip in 50ml of Iron nitrate solution and a lead metal strip in 50ml of lead nitrate solution. - Combine the most reactive (anodic) metals from the first two cells, to create the next cell. This combination will determine the overall 1st and 2nd most reactive. The next cell set up will be the two least reactive (cathodic) metals from the first two cells, this will determine the 3rd most reactive and the least reactive overall. Results | |Voltage |Anode |Cathode |Half Equations | |Copper-Zinc

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