Activity: Operating the Equipment

￿Measuring Data

uThe voltage is displayed on the calculator.

uLower the arm of the stand so the metal plates are submersed in the dilute sulfuric acid solution, without coming into contact with the cistern.

1Stand Arm

2Cistern

uIf the variation in voltage becomes small, use the pipette with a bulb to inject a small amount of hydrogen peroxide into the dilute sulfuric acid around the copper plate.

1Stand Arm

2Cistern

3Copper Plate

4Pipette with a bulb

5Hydrogen Peroxide

6Hydrogen Foam

7Hand

uRepeat this process as you monitor the life of the battery.

1Hydrogen Peroxide Added Here

V(V): Voltage

t(s) : Time

2-13-2

English

Measurementasurement

￿Calculator Operation

uThe voltage is measured and displayed using the Voltage Measurement Setup.

uFind the applicable program in the Program Library (P.2-16-4), input it into your calculator, and then run it.

55555555555555555555555Other Things To Do

 

u Compare the initial voltaic battery electromotive force with the theoretical value of

 

 

1.1V.

 

 

u Try changing the surface area of the two electrodes that is in contact with the dilute

 

 

sulfuric acid solution, and note any changes in the electromotive force.

 

 

u Find out what you can about the Daniel Cell, which is one type of battery that is not

 

55555555

prone to loss of voltage due to hydrogen build-up on the positive electrode.

55555555

(5V maximum) and determine its useful life.

 

u Perform long-term measurement of a commercially available manganese battery

 

5555555555555555555555

20020601