A solution containing Pt44 is electrolyzed with a current of 3.60 A. How long will it...

Question

Question

A solution containing Pt44 is electrolyzed with a current of 3.60 A. How long will it take to plate out 99% of the platinum i

Answer 1

Answer #1

Answer

531s

Explanation

Pt⁴⁺ + 4e^- ---------> Pt

To deposite 1mole of Pt 4moles of electrons requirex

Initial moles of Pt⁴⁺= ( 0.025mol/1.00L) × 0.20L = 0.005mol

99% of 0.004mol = ( 0.005mol/100)× 99= 0.00495mol

moles of electrons required to deposite 0.00495moles of Pt = 4× 0.00495mol = 0.01980mol

charge of 0.01980moles of electrons = 96485C/mol ×0.01980mol = 1910.4C

1A = 1C/s

3.60A = 3.60C/s

time required = 1910.4C/3.60C/s = 531s

Answer 2

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