Making Simple Cells (AQA A-Level Chemistry): Flashcards

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Making Simple Cells
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Purpose of simple cell experiment

Measure EMF from different metal electrode combinations

Why clean electrodes with sandpaper

Remove oxide layer for good electrical contact

Salt bridge solution

Saturated potassium nitrate (KNO3KNO_{3}) solution

Voltmeter +ve terminal connects to

Electrode with higher reduction potential

Dilution factor used in concentration study

Factor of 10

Why measured EMF << calculated EMF

Non-standard conditions affect EMF

Effect of decreasing [ion] on EMF

EMF decreases

Equation relating EMF to concentration

Nernst equation

Total dilutions in concentration investigation

5 dilutions

Metals for best EMF results

Large difference in electrode potentials

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