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Which equation does not show the reduction of a transition metal? A TiCl₄ + 2Mg → Ti + 2MgCl₂ B 2FeCl₃ + 2KI → 2FeCl₂ + I₂ C MnO₂ + 4HCl → MnCl₂ + Cl₂ + 2H₂O D CoO + 4HCl → [CoCl₄]^{2-} + H₂O + 2H⁺ - AQA - A-Level Chemistry - Question 21 - 2021 - Paper 3
Question 21
![Which-equation-does-not-show-the-reduction-of-a-transition-metal?--A-TiCl₄-+-2Mg-→-Ti-+-2MgCl₂--B-2FeCl₃-+-2KI-→-2FeCl₂-+-I₂--C-MnO₂-+-4HCl-→-MnCl₂-+-Cl₂-+-2H₂O--D-CoO-+-4HCl-→-[CoCl₄]^{2-}-+-H₂O-+-2H⁺-AQA-A-Level Chemistry-Question 21-2021-Paper 3.png](https://cdn.simplestudy.io/assets/backend/uploads/question/Question_21_2021_Chemistry_P3.jpg)
Which equation does not show the reduction of a transition metal? A TiCl₄ + 2Mg → Ti + 2MgCl₂ B 2FeCl₃ + 2KI → 2FeCl₂ + I₂ C MnO₂ + 4HCl → MnCl₂ + Cl₂ + 2H₂O D C... show full transcript
Worked Solution & Example Answer:Which equation does not show the reduction of a transition metal? A TiCl₄ + 2Mg → Ti + 2MgCl₂ B 2FeCl₃ + 2KI → 2FeCl₂ + I₂ C MnO₂ + 4HCl → MnCl₂ + Cl₂ + 2H₂O D CoO + 4HCl → [CoCl₄]^{2-} + H₂O + 2H⁺ - AQA - A-Level Chemistry - Question 21 - 2021 - Paper 3
Step 1
Which equation does not show the reduction of a transition metal?
Answer
To determine which equation does not show the reduction of a transition metal, we must analyze each option:
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Option A: In this reaction, titanium is being reduced from Ti⁴⁺ to Ti⁰, indicating that a reduction occurs.
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Option B: Here, iron (Fe³⁺) is reduced to Fe²⁺, indicating a reduction of iron.
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Option C: In this case, manganese is reduced from MnO₂ to Mn²⁺, also indicating a reduction.
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Option D: This reaction does not reduce cobalt; instead, CoO is converting to a cobalt complex ion without a change in the oxidation state of cobalt.
Based on the analysis, the correct answer is Option D.