Investigate the Rate of Electroplating a Met
Sample D –TEACHER INSTRUCTIONS I.B. CHEMISTRY : PRACTICAL
ELECTROCHEMISTRY
INVESTIGATION : INVESTIGATE THE RATE OF ELECTROPLATING A METAL
D DCP CE
Goggles and Lab coats must be worn
Background Students had been taught ‘Electrochemistry’ as outlined in the IB Chemistry syllabus. Investigation Design an experiment that allows you to investigate a variable affecting the rate of electroplating. Your research question must be focussed and specific and must enable you to carry out your experiment safely and within the allocated time. Safety Show your research question to your teacher. Complete a safety hazard assessment before writing a full plan (a + b). Ensure your teacher approves this. Experiment If your plan is safe you will be allowed to complete your experiment, though you must give your teacher notice of any non-standard apparatus you will require, one lesson in advance of your experiment. Assessment Your teacher may take this opportunity to assess almost all of the skills, so work hard and remember to check the criteria.
1
STUDENT’S WORK Chemistry Practical Investigation: Investigate the Rate of Electroplating a Metal Research Question How does the current flowing through the system (0.20 A, 0.40 A, 0.60 A, 0.80 A 1.00 A) affect the rate of electroplating of a copper electrode when the volume (150cm3) and concentration of the copper sulphate electrolyte (1.00 moldm-3), temperature of the system, contact surface area of electrodes and duration of the experiment are kept constant? Independent Variable Current Flowing through the system. Dependent Variable Rate of Electroplating of a Copper Electrode Controlled Variables Volume of Electrolyte used Concentration and Purity of Electrolyte used Temperature of the system Contact surface area of Electrodes Duration of Experiment Apparatus 12V Power Supply, 2x 250cm3 Beaker, 1x 250cm3 Measuring Cylinder ( cm3), Wires, Crocodile Clips, Rheostat, Digital Multimeter ( 0.01A), Electronic Milligram Balance ( 0.001g),
ELECTROCHEMISTRY
INVESTIGATION : INVESTIGATE THE RATE OF ELECTROPLATING A METAL
D DCP CE
Goggles and Lab coats must be worn
Background Students had been taught ‘Electrochemistry’ as outlined in the IB Chemistry syllabus. Investigation Design an experiment that allows you to investigate a variable affecting the rate of electroplating. Your research question must be focussed and specific and must enable you to carry out your experiment safely and within the allocated time. Safety Show your research question to your teacher. Complete a safety hazard assessment before writing a full plan (a + b). Ensure your teacher approves this. Experiment If your plan is safe you will be allowed to complete your experiment, though you must give your teacher notice of any non-standard apparatus you will require, one lesson in advance of your experiment. Assessment Your teacher may take this opportunity to assess almost all of the skills, so work hard and remember to check the criteria.
1
STUDENT’S WORK Chemistry Practical Investigation: Investigate the Rate of Electroplating a Metal Research Question How does the current flowing through the system (0.20 A, 0.40 A, 0.60 A, 0.80 A 1.00 A) affect the rate of electroplating of a copper electrode when the volume (150cm3) and concentration of the copper sulphate electrolyte (1.00 moldm-3), temperature of the system, contact surface area of electrodes and duration of the experiment are kept constant? Independent Variable Current Flowing through the system. Dependent Variable Rate of Electroplating of a Copper Electrode Controlled Variables Volume of Electrolyte used Concentration and Purity of Electrolyte used Temperature of the system Contact surface area of Electrodes Duration of Experiment Apparatus 12V Power Supply, 2x 250cm3 Beaker, 1x 250cm3 Measuring Cylinder ( cm3), Wires, Crocodile Clips, Rheostat, Digital Multimeter ( 0.01A), Electronic Milligram Balance ( 0.001g),