Electrolysis and Concentration

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C3 Electrolysis and the Concentration Concentration of the solution (in g/dm3) | Current (in amps) | Average Results | | 1st try | 2nd try | 3rd try | | 8 | 0.54 | 0.48 | 0.57 | 0.555 | 12 | 0.63 | 0.66 | 0.64 | 0.635 | 16 | 0.84 | 0.81 | 0.85 | 0.845 | 20 | 0.92 | 1.1 | 1.04 | 1.07 | 24 | 1.34 | 1.15 | 1.62 | 1.245 | Conclusion My graph has a positive correlation. I can see from my table that the higher the concentration, the higher the current. Before I plotted my average results, I made sure that I identified the anomalies, by seeing which one stands out from the rest. I see the pattern because when it was 8 on average of 0.555 and then at 16 it was 0.845, this shows the test went well because it increased each time. The variables in this experiment are the concentration of solution. My results will be reliable because I carried it out 3 times. The variable I will change is the concentration of the solution. My line of best fit shows the positive correlation. I used a good range of concentrations so that the experiment was valid. Also I made sure the pattern in my results was correct. There were too limitations in this experiment. The first being making sure I read the highest possible reading. This was quite difficult because the readings went down very quickly. Another limitation was keeping the anode and cathode separate, so that it wouldn’t change the reading. This was difficult because they are close together. The higher the concentration of the solution, the higher the current. This means that a high concentration solution has more ions. There are more ions discharging meaning there is a stronger current. Anode - 4OH – 4e ----- O + 2H O Negative hydrogen ions are attracted to the anode, where they lose electrons and became oxygen and water. Cathode + 2H + 2e ----- H Positive hydroxide ions are attracted to

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