Ahmad Shah's notes (1 Viewer)

[bengosha60]

So I was looking through his notes on standard potentials and under the dotpoint:

Perform a first-hand investigation and gather first-hand information to measure the difference in potential of different combinations of metals in an electrolyte solution

He wrote:
• [ Zn | Zn2+ || Cu2+ | Cu ]: TOTAL voltage = 0.4 V
• [ Mg | Mg2+ || Cu2+ | Cu ]: TOTAL voltage = 0.95 V
• [ Al | Al3+ || Cu2+ | Cu ]: TOTAL voltage = 0.2 V
• [ Fe | Fe2+ || Cu2+ | Cu ]: TOTAL voltage = 0.5 V

I'm not sure if he's right on this or I'm just really lost. For each one I calculated:
1.1V
2.7V
2.0V
0.75V
Can someone confirm this?

 

[timeflies]

Haha I think the values he has given are experimental values. So the voltage he got when doing the experiment. They are not meant to be the theoretical values. I do believe you're working out for the theoretical values is correct!

 

[bengosha60]

ohh I think your'e right LOL my bad. Thanks ^_^