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The following diagrams represent combinations of four galvanic half-cells (G^{2+}, J^{+}, Q^{2+} and R^{2+}) that were investigated under standard conditions - VCE - SSCE Chemistry - Question 29 - 2018 - Paper 1
Question 29
The following diagrams represent combinations of four galvanic half-cells (G^{2+}, J^{+}, Q^{2+} and R^{2+}) that were investigated under standard conditions. Each ... show full transcript
Worked Solution & Example Answer:The following diagrams represent combinations of four galvanic half-cells (G^{2+}, J^{+}, Q^{2+} and R^{2+}) that were investigated under standard conditions - VCE - SSCE Chemistry - Question 29 - 2018 - Paper 1
Step 1
Which of the following indicates the order of the half-cell reactions, from the lowest E^{o} value to the highest?
Answer
To determine the order of the E^{ ext{o}} values, we should analyze the half-cells:
- G^{2+} will generally have a higher E^{ ext{o}} value due to its stable configuration as a cation.
- Q^{2+} will follow, depending on its standard reduction potential.
- J^{+} is likely to be lower than both G and Q, depending on the specifics of the galvanic reactions.
- R^{2+} tends to have the lowest reduction potential based on typical electrochemical series. Thus, the order from lowest to highest E^{o} values is: D. G^{2+}, Q^{2+}, J^{+}, R^{2+}.