In an experiment, 295 mg of copper is deposited when a current of 500 mA passes for 30 minutes. Find the electrochemical equivalent of copper
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Electrochemical equivalent is the mass of the substance which is deposited or liberated during electrolysis by the passage of one Coulombs of charge.
The S. I unit is: KG/COULOMB
IMPORTANT CONVERSIONS :
1 minute = 60seconds
1mA =0.5A
1Kg = 1000000milligrams
CALCULATIONS:
Let Z be the electrochemical equivalence then formulae is:
Z=m/Q where m is the mass of the substance and Q the charge.
m=295/1000000=0.000295Kg
Q=It
I=500 × 0.001=0.5A
t=60 × 30=1800seconds
Q=0.5 ×1800=900coulombs.
Z=0.000295/900=3.2778 × 10^-7Kg/Coulomb
Answer :
3.2778 × 10^-7 Kg/Coulombs.
The S. I unit is: KG/COULOMB
IMPORTANT CONVERSIONS :
1 minute = 60seconds
1mA =0.5A
1Kg = 1000000milligrams
CALCULATIONS:
Let Z be the electrochemical equivalence then formulae is:
Z=m/Q where m is the mass of the substance and Q the charge.
m=295/1000000=0.000295Kg
Q=It
I=500 × 0.001=0.5A
t=60 × 30=1800seconds
Q=0.5 ×1800=900coulombs.
Z=0.000295/900=3.2778 × 10^-7Kg/Coulomb
Answer :
3.2778 × 10^-7 Kg/Coulombs.
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