In an electrochemicalcell, dichromate ions in aqueous acidic medium are reduced to Cr 3 + . The current (in amperes) that flows through the cell for 48.25 minutes to produce 1 mole of Cr 3 + is _____

Question

In an electrochemicalcell, dichromate ions in aqueous acidic medium are reduced to Cr 3 + . The current (in amperes) that flows through the cell for 48.25 minutes to produce 1 mole of Cr 3 + is _____ . Use: 1 Faraday = 96500 C mol − 1

TestHub · Accepted Answer

For reduction of dichromate, balanced reaction is : Cr 2 ​ O 7 − 2 ​ ( aq ) + 6 e − + 14 H + ( aq ) → 2 Cr 3 + ( aq ) + 7 H 2 ​ O ( l ) 3 M o l e 1 M o l e Number of Farads required = 3 mol Let current = I amperes ​ ⇒ 96500 I × 48.25 × 60 ​ = 3 I = 100 A ​

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