You need both the Phosphate and Cobalt to create the catalyst and make this experiment work. To control as many variables as possible, you are comparing the results after the addition of Cobalt to when there is no Cobalt in the system. This means you start with the Phosphate buffered solution in the water, and use this solution as the control.formed from cobalt ions (Co) in a phosphate (Pi) buffered solution (Co-Pi).
AjayJain73 wrote:Please help on the following questions:
1. Why are we using Nickel metal strips as electrodes and not any other metal?
AjayJain73 wrote:2. The voltage readout on each of my "9V" battery is between 10.11 and 10.15V. When I connect all 4 9V batteries in series, the total voltage readout is 40.3V. Is this okay?
AjayJain73 wrote:3. How do I know that how much voltage is dropped across the 10,000 Ohm resistor and electrochemical cell in my experiment? Technical note1 in procedure indicates approx 30v across the 10,000 Ohm resistor and 1.5-3v are dropped across the electrochemical cell. How did they come up with these values?
AjayJain73 wrote:4. Why does the procedure assume a value of 1.23V for the ideal voltage? How is this value calculated?
AjayJain73 wrote:5. How is Hydrogen strored that is created as part of the water splitting reaction?
AjayJain73 wrote:6. When I added Cobalt Nitrate in the last before the voltage stabilzed, the voltage reading on the voltmeter was 1.94v but the voltage reading in the clear Phosphate Buffer solution after that was 2.02V. Why the voltage reading increased after putting the electrodes in clear Phosphate Buffer solution?
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