Results: pH and Liver Catalyst

20% HCl
Start gas volume: 75 mL
Stop gas volume: 85 mL
Time: 1:58
* this was our first trial so we did it again because we thought we had made errors.

20% HCl (trial 2)
Start gas volume: 50 mL
Stop gas volume: 105 mL
Time: 0:22

40% HCl
Start gas volume: 85 mL
Stop gas volume: 500 mL (MAX)
Time: 0:23
*since this trial reached the maximum volume we did it again.

40% HCl (trial 2)
Start gas volume: 105 mL
Stop gas volume: 500 mL
Time: 0:34
*this one produced gas rapidly, then stopped, so time was stopped. Gas then suddenly continued being produced at the same pace, so time was started again.

60% HCl
Start gas volume: 50 mL
Stop gas volume: 225 mL
Time: 0:12

20% NaOH
Start gas volume: 60 mL
Stop gas volume: 500 mL (MAX)
Time: 0:55
*this one reached the max as well but we didn't have time to redo it.

40% NaOH
Start gas volume: 50 mL
Stop gas volume: ~550 mL
Time: 0:37
*this trial stopped about 50 mL after the 500 mL mark.

60% NaOH
Start gas volume: 60 mL
Stop gas volume: 400 mL
Time: 0:30