I used HCl and NaOH at dilute concentrations and small volumes for safety and to conserve resource. I used a pH probe, a magnetic stirrer, and a CBL. (I used the CBL to collect and to transfer the data to a TI 82) There were many challenges at first, things that seem as insignificant as how fast you pour the NaOH or where you pour it had a drastic effect on the data.
In the end, I obtained data for 10oC, 23oC, 40oC, 60oC. Data were in the form of pH over time, so I had to convert it to [H+] over time, and then to rate of reaction over time, then to rate constant over time, then finally to Z over time. I averaged the Z at each temperature, and ended with an unique Z for each of the temperatures.
After trying equation after equation, I decided that the data points are best represented by Z = 24.4 t^(1/2), where t is temperature in degrees Celsius. Original hypothesis rejected.
This project is to find a causation between temperature and the z-collision rate factor.
Science Fair Project done By Isaac F. Ho