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The number of equivalents of Na2S2O3 required for the volumetric estimation of one equivalent of Cu2+ is
- a)1
- b)2
- c)3/2
- d)3
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
The number of equivalents of Na2S2O3 required for the volumetric estim...
Volumetric estimation of Cu2+ is carried out iodometrically as follows:
2 Cu2+ + 4 Kl = 2 Cul2 + 4K+
2 Cul2 = 2 Cul + l2
This liberated l2 is titrated against Na2S2O3 solution
2Na2S2O3 + l2 = Na2S4O6 + 2 Nal
2 moles Cu2+ ions ≡ 1 mole l2 ≡ 2 moles of Na2S2O3
∴ 1 mole Cu2+ ion ≡ 1 mole Na2S2O3
Eq. wt. of Na2S2O3 = mol. wt
∴ 1 mole Cu2+ ion ≡ 1 Eq. wt. of Na2S2O3
2 Cu2+ + 4 Kl = 2 Cul2 + 4K+
2 Cul2 = 2 Cul + l2
This liberated l2 is titrated against Na2S2O3 solution
2Na2S2O3 + l2 = Na2S4O6 + 2 Nal
2 moles Cu2+ ions ≡ 1 mole l2 ≡ 2 moles of Na2S2O3
∴ 1 mole Cu2+ ion ≡ 1 mole Na2S2O3
Eq. wt. of Na2S2O3 = mol. wt
∴ 1 mole Cu2+ ion ≡ 1 Eq. wt. of Na2S2O3
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The number of equivalents of Na2S2O3 required for the volumetric estim...
Calculating the Number of Equivalents of Na2S2O3
To determine the number of equivalents of Na2S2O3 required for the volumetric estimation of one equivalent of Cu2+, we need to consider the chemical reaction between Na2S2O3 and Cu2+.
Chemical Reaction:
Cu2+ + 2Na2S2O3 → CuS2O3 + 2Na+ + Na2S4O6
Stoichiometry:
From the balanced equation, we can see that 1 equivalent of Cu2+ reacts with 2 equivalents of Na2S2O3.
Therefore, the number of equivalents of Na2S2O3 required for the estimation of 1 equivalent of Cu2+ is 1.
This means that for every equivalent of Cu2+ present in the solution, only 1 equivalent of Na2S2O3 is needed to complete the reaction and reach the endpoint in the titration process.
To determine the number of equivalents of Na2S2O3 required for the volumetric estimation of one equivalent of Cu2+, we need to consider the chemical reaction between Na2S2O3 and Cu2+.
Chemical Reaction:
Cu2+ + 2Na2S2O3 → CuS2O3 + 2Na+ + Na2S4O6
Stoichiometry:
From the balanced equation, we can see that 1 equivalent of Cu2+ reacts with 2 equivalents of Na2S2O3.
Therefore, the number of equivalents of Na2S2O3 required for the estimation of 1 equivalent of Cu2+ is 1.
This means that for every equivalent of Cu2+ present in the solution, only 1 equivalent of Na2S2O3 is needed to complete the reaction and reach the endpoint in the titration process.
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The number of equivalents of Na2S2O3 required for the volumetric estimation of one equivalent of Cu2+ isa)1b)2c)3/2d)3Correct answer is option 'A'. Can you explain this answer?
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The number of equivalents of Na2S2O3 required for the volumetric estimation of one equivalent of Cu2+ isa)1b)2c)3/2d)3Correct answer is option 'A'. 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 The number of equivalents of Na2S2O3 required for the volumetric estimation of one equivalent of Cu2+ isa)1b)2c)3/2d)3Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The number of equivalents of Na2S2O3 required for the volumetric estimation of one equivalent of Cu2+ isa)1b)2c)3/2d)3Correct answer is option 'A'. Can you explain this answer?.
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