300 DIY Science: Illustrated Guide to Home Chemistry Experiments
RQEWEvI UESTIOnS
q 1 : Why did the LED remain unlit with the copper/iron cell?
q: 2 What relationship exists between the surface area of the electrodes and the voltage produced by the cell?
q: 3 What relationship exists between the surface area of the electrodes and the current produced by the cell?
q: 4 Commercial alkaline cells (“batteries”) use electrodes made from zinc powder and manganese dioxide powder. Why do these
cells use powder rather than solid chemicals?