Use the table to the right to predict which of the following species would be th

Question

Use the table to the right to predict which of the following species would be the most effective oxidizing agent and which would be the most effective reducing agent? Cu^2+ Cu^+ Zn^2+ Li^+ Au Ca oxidizing agent = Zn^2+ and reducing agent = Cu^+ oxidizing agent = Zn^2+ and reducing agent = Li^+ oxidizing agent = Cu^2+ and reducing agent = Au oxidizing agent = Cu^2+ and reducing agent = Ca oxidizing agent = Cu^2+ and reducing agent = Li^+ The two diagrams below represent snapshots of a very small portion of a first-order reaction in which A molecules are being converted to B molecules (A rightarrow B). Which of the following diagrams represents a snapshot of the reaction at time = 2 minutes? If it takes 42.0 minutes for the concentration of a reactant in a first-order reaction to drop from 0.45 M to 0.32 M, how long will it take for the reaction to be 90% complete? 554 min 284 min 196 min 85.4 min 12.9 min

Explanation / Answer

22)

Greater the value of EO, better is the oxidising agent
This has to be cation since it need to get reduced

Cu2+ is best oxidising agent from given options (since Au3+ is not there)

lesser the value of EO, better is the reducing agent
This has to be element and not ion since it need to get oxidised to ion

Ca is best reducing agent from given options (since Li is not there)

Answer: d

22)
in 1 min half of the molecules has converted
in another 1 min half of rmaining will be converted
Answer: c

I am allowed to answer only 1 question at a time

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