chemistry calculations b
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IGCSE Chemistry Chemistry Calculations part 2 of 4TRANSCRIPT
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IGCSE Chemistry
Chemistry Calculations B
24 Electrolysis Calculations
Quantities of electricity
- The Coulomb
1 Coulomb is the quantity of electricity which passes if 1 ampere flows for 1
second
That means:
Number of coulombs = current in amps x time in seconds
Q = It
Q Calculate the quantity of electricity in coulombs if 3 amperes flow for 6 minutes.
- The Faraday Constant
1 Faraday is the quantity of electricity which passes if 1 mole of electrons
(6 x 1023 electrons) passes a particular point in a circuit
1 Faraday 96500 Coulombs
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Q What mass of copper is deposited on the cathode during the electrolysis of
copper (II) Sulphate solution if 0.15 amps flow for 10 minutes?