Please enable JavaScript.

Coggle requires JavaScript to display documents.

Investigation of factors that affect the mass of copper deposited on the…

- - - - Would ensure no copper is lost but is time consuming and electrolyte may not be completely evaporated by end of 110 minute window
    - - May cause loosely attached copper atoms to dislodge, making the mass recorded lower than its true value
    - - Dryer
        
        Quick drying but force of air particles may blow poorly attached copper atoms, affecting the accuracy of the mass recorded
      - Bunsen burner
        
        Effective dryer and accessible in school environment however copper sulfate produces toxic fumes when heated
      - Heat lamp
        
        Speed up drying process without disrupting copper atoms and is very accessible
  - - - Oxidation at anode and reduction at cathode occur at the same rate thus the mass lost at anode = to that gained at cathode. More accurate as there is no issue with loosing any copper when drying and weighing it. Change in mass will be recorded
    - - Insufficiently stuck copper atoms could be lost in the electrolyte or when drying, reducing the accuracy of the change in mass recorded
- - - - Easily controlled and monitored with water baths and produces a clear graphical trend. Will be the variable investigated
  - - - Voltage produced is often inconsistent which would cause random error and affect the final trend.
  - - - Cannot be directly altered on the power packs provided and often fluctuates, causing random error, and addition of ammeter may introduce systematic error
  - - - Requires little equipment and would produce a clear graphical trend however time constraints on the lesson my inhibit the number of trials conducted
  - - - difficult to measure and control the surface area in school environment as strips are pre-cut and vary in shape and size
  - - - Volumetric equipment can be used which is quite precise however will be time consuming to make multiples of each concentration
  - - - With equipment provided, it is too difficult to ensure that the distance remains constant across the trials and having distances that are at significant intervals to be able to identify a trend
- - - - reduces effect of outliers caused by random error
- - - - 5 minutes to react
    - - 10 minutes to warm