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Consider a titration of potassium dichromate solution with acidified Mohr's salt solution using diphenylamine as indicator. The number of moles of Mohr's salt required per mole of dichromate is
Correct answer is '6'. Can you explain this answer?
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Consider a titration of potassium dichromate solution with acidified M...
In the redox reaction, Cr2O72- oxidises Mohr's salt, FeSO4.(NH4)2SO4.6H2O.
6Fe2+ + Cr2O72- + 14H+ → 6Fe3+ + 2Cr3+ + 7H2O
Mohr's salt [FeSO4.(NH4)2SO4.6H2O] and dichromate reacts in 6 : 1 molar ratio.
One mole of Cr2O72- will require six moles of Fe2+ ions.
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Consider a titration of potassium dichromate solution with acidified M...
Explanation:
1. Balanced Chemical Equation:
The balanced chemical equation for the titration can be written as:
6Fe(NH4)2(SO4)2 + K2Cr2O7 + 14H2SO4 → 3(NH4)2SO4 + Cr2(SO4)3 + K2SO4 + 6FeSO4 + 7H2O
2. Calculation of Moles:
From the balanced equation, we can see that 1 mole of K2Cr2O7 reacts with 6 moles of Fe(NH4)2(SO4)2. Therefore, the number of moles of Mohr's salt required per mole of dichromate is 6.
3. Use of Diphenylamine Indicator:
Diphenylamine is used as an indicator in this titration to detect the endpoint of the reaction. It changes color from colorless to blue in the presence of excess Fe2+ ions, indicating the completion of the reaction.
4. Endpoint of the Titration:
The titration is complete when all the dichromate ions have reacted with Mohr's salt, resulting in the formation of chromium ions. At this point, the blue color of diphenylamine indicates that the reaction has reached its endpoint.
5. Importance of Mohr's Salt:
Mohr's salt (Fe(NH4)2(SO4)2) is used in this titration as a reducing agent to convert the dichromate ions to chromium ions. It is crucial in accurately determining the concentration of the dichromate solution.
In conclusion, the number of moles of Mohr's salt required per mole of dichromate in this titration is 6. This information is essential for calculating the concentration of the potassium dichromate solution accurately.
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Consider a titration of potassium dichromate solution with acidified Mohrs salt solution using diphenylamine as indicator. The number of moles of Mohrs salt required per mole of dichromate isCorrect answer is '6'. Can you explain this answer?
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Consider a titration of potassium dichromate solution with acidified Mohrs salt solution using diphenylamine as indicator. The number of moles of Mohrs salt required per mole of dichromate isCorrect answer is '6'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Consider a titration of potassium dichromate solution with acidified Mohrs salt solution using diphenylamine as indicator. The number of moles of Mohrs salt required per mole of dichromate isCorrect answer is '6'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider a titration of potassium dichromate solution with acidified Mohrs salt solution using diphenylamine as indicator. The number of moles of Mohrs salt required per mole of dichromate isCorrect answer is '6'. Can you explain this answer?.
Consider a titration of potassium dichromate solution with acidified Mohrs salt solution using diphenylamine as indicator. The number of moles of Mohrs salt required per mole of dichromate isCorrect answer is '6'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Consider a titration of potassium dichromate solution with acidified Mohrs salt solution using diphenylamine as indicator. The number of moles of Mohrs salt required per mole of dichromate isCorrect answer is '6'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider a titration of potassium dichromate solution with acidified Mohrs salt solution using diphenylamine as indicator. The number of moles of Mohrs salt required per mole of dichromate isCorrect answer is '6'. Can you explain this answer?.
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