acid base reactions nick guerrero nick delinski jake seiler ken nakai
TRANSCRIPT
Acid Base Reactions
Nick Guerrero
Nick Delinski
Jake Seiler
Ken Nakai
Introduction
The purpose of the following experiments was to collect a wide variety of data using specialized computer-based probes.
We also evaluated the software, Logger Pro, and the hardware, LabPro.
The Probes
The Dissolved Oxygen Probe
The Probes
The Dissolved Oxygen Probe
Used to measure the oxygen dissolved in a liquid
The Probes
The pH Probe
The Probes
The pH Probe
Used to measure the pH of a given solution.
The ProbesThe Temperature Probe
The ProbesThe Temperature Probe
Used to measure the temperature of a solution.
The ProbesThe Conductivity Probe
The ProbesThe Conductivity Probe
Used to measure the ability of a solution to conduct electricity between two electrodes.
The Experiment
Using two iBook computers connected to two LabPro hubs, we conducted the four experiments simultaneously.
Each computer recorded data in real-time from two of the probes.
The Experiment
We performed the following experiments:
Adding baking soda to Coca-Cola
Adding baking soda to vinegar
Adding aqueous ammonia to lemon juice
The Hypothesis - Reaction A
Adding baking soda to Coca-Cola:pH will increase as the acid from the cola is neutralized.
Temperature will increase as the reaction proceeds.
Dissolved oxygen will decrease as gas is released from the solution.
The solution will begin to conduct more as we add ions to the solution.
The Hypothesis - Reaction B
Adding baking soda to vinegar:pH will increase as the vinegar is neutralized.
Temperature will increase.
Dissolved oxygen will decrease.
The solution will begin to conduct more as we add ions to the solution.
The Hypothesis - Reaction C
Adding aqueous ammonia to lemon juice:pH will increase as the vinegar is neutralized.
Temperature will increase.
Dissolved oxygen will decrease.
The solution will begin to conduct more as we add ions to the solution.
The Results
The following data was collected for Reaction A, the baking soda and Coca-cola.
The Results
The following data was collected.
The Results
The following data was collected.
The Results
The following data was collected for Reaction B, the vinegar and baking soda.
The Results
The following data was collected for Reaction B, the vinegar and baking soda.
The Results
The Results
The following results were obtained during Reaction C, the ammonia and lemon juice.
The Results
The following results were obtained during Reaction C, the ammonia and lemon juice.
The Results
The Conclusions - Reaction A
It was apparent during the baking soda and Coca-cola reaction that the temperature decreased, dissolved oxygen decreased, conductivity increased, and pH increased . This was a surprise to us, since we were not aware that the reaction was endothermic.
The Conclusions - Reaction B
During the vinegar/baking soda reaction, the temperature decreased, dissolved oxygen decreased, conductivity increased, and pH increased . Again, it was surprising that the reaction lowered the temperature of the solution.
The Conclusions - Reaction C
The ammonia/lemon juice reaction yielded even more surprises; the temperature increased, dissolved oxygen increased, conductivity decreased, and pH increased.
The first three probes gave data contrary to our previous two experiments.
The Conclusions - Reaction C
We may have not noticed the temperature changes using non-computer based thermometers.
Technology also allowed us to test all four areas at the same time (and in real-time), allowing us to draw guaranteed, factual results.
Money issues!!!!
The End
Authors:
Ken Nakai
Nick Guerrero
Nick Delinski
Jake Seiler