Subject: how certain variables affect the current and voltage in a Daniel Cell

As quickly as possible.  I have a science experiment and my results came 
out kind of jumpy, they support my hypothesis, but at certain points there 
are unusual shifts, my opinion being the seemingly fault measuring 
devices. Any comments as to the truth behind my hypothesis would be 
helpful.

All of these are in reguard to a daniel cell made of a half cell of ZnSO4
(aq) and a half cell of CuSO4(aq), with corresponding metal electrodes 
linked by a salt bridge of saturated NH4NO3(aq) under normal temperature 
and pressure, with 1M solutions.

1) The rise in temperature will yield a rise in current and slight rise in 
voltage.

2) As the solutions become more concentrated(.01M, .1M, .5M, 1M, 2M) there 
will be a proportional rise in current and moderate rise in voltage.

3)As the electrodes surface area grow there will be a proportional rise in 
current and no rise in voltage.

Thanks.

Bob.

Re: how certain variables affect the current and voltage in a Daniel Cell