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An experiment to investigate the change in cell potential with concentration.

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  • Essay length: 1713 words
  • Submitted: 19/06/2006
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University Degree Cell Biology

The first 200 words of this essay...

8/1/04

Emma Duckworth 7E

An experiment to investigate the change in cell potential with concentration.

Aim:

The purpose of this experiment was to investigate how changing the silver ion concentration in a silver half cell affects the potential of the silver electrode.

Apparatus:

==> Chemicals/ substances:

* Copper (II) sulphate solution

* Copper foil

* Silver nitrate solution (make up to 6 different concentrations)

* Silver wire

* Distilled water

* Saturated potassium nitrate solution

==> Additional apparatus:

* Safety goggles

* 7 beakers

* 6 pieces of filter paper

* High resistance voltmeter

* 2 connecting leads with crocodile clips

Diagram:

Method:

==> Set up the following cell, using 1 M copper (II) sulphate solution and 0.1 M silver nitrate solution, including a voltmeter and a salt bridge:

Cu(s) Cu 2+ ((aq), 1M) Ag+ ((aq), x M) Ag(s)

==> Measure the potential difference of the cell with the voltmeter and note its polarity. Remove the salt bridge as soon as possible.

==> Dilute the 0.1 M silver nitrate solution to 0.01 M silver

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