Gain Immediate access to our Essays
FREE access exchanged for your work, or pay £4.99
... has turned a purply-brown colour). I predict that when I plot a graph of temperature against volume of DCPIP used, I will get a straight-line, indicating direct correlation between the two. Method: In order that we obtained the most accurate results possible, I conducted a preliminary experiment. This helped me gauge what quantities of substances would give me the best results, and the most practical method available. Thus my actual set of results and the method for the final experiment differ somewhat from my preliminary results and method. Preliminary method: After setting up the titration apparatus and pouring in 25 cm3 of orange juice, I measured the temperature of the orange juice. Recording this I added DCPIP until the solution turned purply-brown. I kept this colour as the standard colour to indicate when the reaction had finished, and managed to control the amount of DCPIP very precisely due to ...