An electrical engineer is analyzing an electroplating run and wants to calculate the charge that has been used. She knows that the cell voltage is 0.25 V and that 10.3 kWh was expended. What was the charge? If the current of the apparatus is 3.0 A, how long was it running?
An electrical engineer is analyzing an electroplating run and wants to calculate the charge that has been used. She knows that the cell voltage is 0.25 V and that 10.3 kWh was expended. What was the charge? If the current of the apparatus is 3.0 A, how long was it running?
Chapter22: Bulk Electrolysis: Electrogravimetry And Coulometry
Section: Chapter Questions
Problem 22.8QAP
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A metallurgist wants to gold-plate a thin sheet with the
following dimensions: 1.5 in X 8.5 in × 0.0012 in. The
gold plating must be 0.0020 in thick.
(a) How many grams of gold (d
required?
(b) How long will it take to plate the sheet from AuCN
using a current of 7.00 A? (Assume 100% efficiency.)
= 19.3 g/cm³) are
5.
An electrical engineer is analyzing an electroplating run
and wants to calculate the charge that has been used. She
knows that the cell voltage is 0.25 V and that 10.3 kWh
was expended. What was the charge? If the current of the
apparatus is 3.0 A, how long was it running?
6.
An electrolysis cell for aluminum production operates at
5.0 V and a current of 1.0 × 10' A. Calculate the number
of kilowatt-hours of energy required to produce 1 metric
ton (1.0 x 10* kg) of aluminum. (1 kWh = 3.6 × 10° J and
1J = 1 C V.)
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