Evaluations


 * Evaluations- Bethany

Batteries Comparing-** Our hypothesis was really off. It turns out that the higher the concentration of salt the lower the voltage of the battery.

Table Salt: 10g: 0.48 volts Copper sulfate: 0.25 volts  Zinc Chloride: 0.60 volts 20g 0.41 volts	                           0.18 volts                          0.55 volts 30g 0.43 volts                           0. 14 volts                        0.43 volts

The second part of our hypothesis is also wrong. “Since the metal we use is copper then the copper sulfate salt might give a stronger voltage. Although from the graph above copper sulfate gave out the least amount of voltage.

Strengths and weaknesses: Our strengths in this experiment was that the measurements were really accurate. The experiment itself is also clear and easy to understand and not much complications to it. Although one thing we could have changed was measuring the amount of salt. We took a lot of our time measuring the salt to get to 10,20 and 30grams. When all we could have done was add 10 grams each time.

Conclusions- From the information we have collected through this experiment it seems that the lower the concentration of salt the more voltage the battery can give. Then using zinc chloride was the type of salt that was the one that gave out the most voltage on a low concentration in 500ml of water. So to make the strongest battery I would recommend to use 10g of zinc chloride in 500 ml of water. 10 grams:

Table Salt: 0.48 volts Copper sulfate: 0.25 volts Zinc Chloride: 0.60 volts