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VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: nerd on August 15, 2009, 11:26:01 am

Title: Some Electrochemistry Questions
Post by: nerd on August 15, 2009, 11:26:01 am

I have a few questions re. galvanic cells:

1. Are there any metals you could NOT set up to test a half cell with the metal acting as an electrode in the solution with the conjugate oxidant?
2. Why does a reaction occur when an electrolyte is present in the solution?
3. What are two functions of the electrodes in the galvanic cell? (I can only think of one!)

Thanks.

Title: Re: Some Electrochemistry Questions
Post by: Mao on August 15, 2009, 11:33:32 pm

1. Potassium, Sodium, Lithium, etc. Anything that reacts with water (i.e. below the water equation)

2. Salt-bridge, balances the charge difference (assuming that's the question)

3. Conduct electric-current, can be a reactant.

Title: Re: Some Electrochemistry Questions
Post by: nerd on August 16, 2009, 02:47:48 pm

Thanks Mao. Also - are galvanic cells energy storage devices? Explain.