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EXPERIMENT 6 - EXPER I M E N T 6 STANDARD ELECTRODE POTEN T...

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EXPERIMENT 6 - STANDARD ELECTRODE POTENTIALS AND SOLUBILITY - PRODUCT FROM POTENTIAL MEASUREMENTS Biomolecular Dynamics Report 3 By: Jonathon Nguyen (16323012) Question A 1. Draw a typical experimental arrangement of a hydrogen electrode. 2. Briefly describe the origin of liquid junction potentials. How are liquid junction potentials avoided in practice? A liquid-junction potential is the extra potential difference generated across the interface of two electrolytes when they are in contact. A salt bridge is used to avoid the extra potential difference. 3. Using literature values of E 0 Ag,AgCl and E 0 Ag calculate Ksp for AgCl. You will need this value to compare with your experimental value. E 0 Ag,AgCl = +0.22v E 0 Ag = +0.80v E 0 Ag,AgCl - E 0 Ag = RT/F ln K sp 0.22 – 0.80 = 25.693x10 -3 ln K sp K sp = 1.6x10 -10 Aim: to obtain the standard electron potential values of copper, zinc and silver to obtain the solubility product of silver chloride by setting up a variety of electrochemical cells and measuring their EMF Theory:
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