Please enable JavaScript.
Coggle requires JavaScript to display documents.
What factors might affect the mass of copper which is deposited on the…
What factors might affect the mass of copper which is deposited on the cathode in a copper electroplating cell?
Independent Variable
Changing the voltage
Advantages - Easy to control, can you a power supply. Voltage creates current and therefore, more voltage creates more electrons which creates faster oxidation and reduction.
Limitations - Incorrect calibration could cause a systematic error. There could also be fluctuations in energy supplied which could create inconsistent trials.
-
Concentration of CuSO4
Advantages - Simple with the recourses available. Concentration is easy to measure when using standard solutions.
Limitations - A standard solution has to be made more every change in concentration which is time consuming. Random errors such as parralax may be present multiple times
Time in electrolyte
Advantages - Can be measured using a stop watch, As Q = I x t and m is directly proportional to Q, increasing the time would have an effect on the mass deposited on the cathode.
-
-
-
Safety Considerations
-
-
-
-
Use PPE to protect from broken glass, chemical exposure and inspect any electrical equipment
-
-
Justification - The factor which has been chosen is changing the voltage as this is factor which has the most advantages with small limitations. A simple method which can followed us connecting the electrodes to the bench-top power supply and changing the voltage from 6V, 8V, 10V and 12V. The dependent variable of this experiment will be the mass which is deposited onto the cathode during electrolysis. Results can be recorded in. table where the initial and final mass is recording using an electronic balance where finally using calculations, the mass which is deposited onto the cathode can be found.
-