The magnitude of the change in oxidising power of the couple is if the concentration is decreased from 1 M to M at . (Assume ). The value of x is . [Given: ]

Question

The magnitude of the change in oxidising power of the  couple is  if the  concentration is decreased from 1 M to  M at . (Assume ). The value of x is . [Given: ]

Canvas Classes · Accepted Answer

Strategy:
 Use Faraday's Law to relate charge passed to gas production. Be careful with stoichiometric factors for oxygen ( per mole).

Step 1: Total Charge ()
, .

Step 2: Moles of Oxygen
Reaction: .
Stoichiometry: 4 Faradays produce 1 mole of .

Step 3: Volume in mL

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