The period of time that Downs cell was active is 1.69×10^6 seconds.
An iron cathode and a carbon anode are used in the Downs cell. Magnesium chloride, which has been heated to a liquid condition, serves as the electrolyte. Despite being a poor conductor of electricity when solid, magnesium chloride becomes a better conductor when it melts because the mobilized chloride and magnesium ions act as charge carriers.
According to the charge time relation, charge and time are related as below:
Charge = Time x Current
Determine what time 77.0 A is as shown beneath:
Charge/ Current = Time
1.30×108 C/ 77.0 A=1.69×10^6 s
Consequently, the period of time that Downs cell was active is 1.69×10^6 seconds.
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