6. Base your answer to the next question on the following table: Half-reaction E

Question

6. Base your answer to the next question on the following table: Half-reaction E* (V) 0.98 -0.67 0.16 1.40 Which species is the strongest oxidizing agent under standard conditions? A) HNO2 B) Se C) UO2 E) Mn22 7. To calculate the pH of a solution of HaA, it should be treated as a A) Polyprotic acid B) Monobasic C) Monoprotic acid D) none of the above 8. Which of the following describes partition chromatography? A) Analytes in the mobile phase are attracted to charged groups covalently attached to 8) Sufficiently small analytes penetrate voids in the stationary phase and are retained C) Analytes equilibrate between the mobile phase and a film of liquid attached to the D) All of the above the stationary phase. greater extent. stationary phase.

Explanation / Answer

For number 6, we can say that the strongest oxidizing agent is that that has the best capacity of being reduced, hence, it has the highest reduction standard potential. In that case, chlorine is the strongest oxidizing agent.

For number 7, we can say that H2A is a polyprotic acid (diprotic) as it has more than one available proton.

For number 8, all of the options describe partition chromatography.

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