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Oxidation and reduction - arranging reactions in order

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I am having trouble with this question:

i) A reacts spontaneously with 1 mol/L BNO3, 1 mol/L D(NO3)2 and dilute sulfuric acid. A does not react with 1 mol/L C(NO3)2

ii) B does not react spontaneously with any of the 1 mol/L solutions above or with dilute sulfuric acid.

iii) C reacts spontaneously with dilute sulfuric acid and with 1 mol/L solutions of all the other metallic salts.

iv) D reacts spontaneously with 1 mol/L BNO3. It does not react with dilute sulfuric acid.

a) Use the observations and arrange the following five reduction half-cell reactions in order, the one with the largest positive reduction potential listed first.

A2 + 2e- A(s)
B+ + e- B(s)
C2+ + 2e- C(s)
D2+ + 2e- D(s)
2H+ + 2e- H2(g)

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The less positive the value of the standard reduction potential (Eo), the more stable the species is and the less easily it ...

Solution Summary

This solution provides a simple explanation as to how to order standard reduction potential.

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Arranging half-cell reactions in order

Arrange the following five reduction half-cell reactions in order listing the largest positive reduction potential first and give the best oxidizing and reducing agents.

Observations:

i) A reacts spontaneously with 1 mol/L BNO3, 1 mol/L D(NO3) and dilute sulfuric acid. A does not react 1 mol/L C (NO3)

ii) B does not react spontaneously with any of the 1mol/L solutions above or with dilute sulfuric acid.

iii) C reacts spontaneously with dilute sulfuric acid and with 1 mol/L solutions of all other metallic salts.

iv) D reacts spontaneously with 1mol/L B(NO3). It does not react with dilute sulfuric acid.

a) Use the observations and arrange the following five reduction half-cell reactions in order. The one with the largest positive reduction potential first ,and tell which is the best oxidizing and reducing agent..

(See the attachment.)

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