I made some changes to the experimental procedure as I felt there were some things that could have been improved on.
New procedure:
Step 1: Squeeze fresh orange juice, enough to fill one whole cup.
Step 2: Take initial pH level of orange juice and record it down.
Step 3: Pour orange juice equally into 2 plastic cups.
Step 4: Immediately cover the top of 1 cup with aluminum foil and cling wrap, and leave the other cup uncovered.
Step 5: Put both cups of orange juice in the fridge.
Step 6: Leave setups inside fridge for 3 hours and record the pH level of the juice every 15 minutes with the help of the data logger and pH probe.
Step 7: Construct a table for each set of data and then plot separate graphs of pH level against time.
Step 8: Repeat entire experiment once more.
Firstly, I decided to do both setups concurrently so that the initial pH levels of both setups would be the same. Using different oranges for both setups could have resulted in different pH levels for both samples of juice. Having same initial pH level will allow the data collected to be easier to analyse, easier to observe the difference in changes in pH level of both setups.
Secondly, I decided to record the pH level every 15 minutes instead of every 30 minutes so that there will be more data recorded, allowing us to observe in more detail on how the pH level changes.
Thirdly, I decided to repeat the entire experiment once more to ensure the accuracy of my results.
No comments:
Post a Comment