Which one of the following would be predicted to spontaneously oxidise aqueous iodide ions but not aqueous chloride ions?
A - VCE - SSCE Chemistry - Question 6 - 2005 - Paper 1
Question 6
Which one of the following would be predicted to spontaneously oxidise aqueous iodide ions but not aqueous chloride ions?
A. Au^+(aq)?
B. Sn^2+(aq)?
C. Fe^2+(aq)?
D... show full transcript
Worked Solution & Example Answer:Which one of the following would be predicted to spontaneously oxidise aqueous iodide ions but not aqueous chloride ions?
A - VCE - SSCE Chemistry - Question 6 - 2005 - Paper 1
Step 1
A. Au^+(aq)?
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Answer
Gold ions (Au^+) are strong oxidizing agents and can oxidize iodide ions (I^-) to iodine (I2). However, due to the relatively less oxidizing nature of Au^+, they may not effectively oxidize chloride ions (Cl^-).
Step 2
B. Sn^2+(aq)?
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Answer
Tin ions (Sn^2+) are not strong enough oxidizers to oxidize iodide ions spontaneously. They can oxidize Cl^- more easily than I^-.
Step 3
C. Fe^2+(aq)?
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Answer
Iron ions (Fe^2+) can oxidize iodide ions but are also capable of oxidizing chloride ions under certain conditions. Thus, it does not satisfy the condition.
Step 4
D. Br2(aq)?
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Answer
Bromine (Br2) is typically a stronger oxidizing agent but does not meet the criteria as it can oxidize both iodide and chloride ions.
