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Sodium thiosulphate is prepared by
- a)reducing Na2SO4 solution with H2S
- b)boiling Na2SO3 solution with S in alkaline medium
- c)neutralising H2S2O3 solution with NaOH
- d)boiling Na2SO3 solution with S in acidic medium
Correct answer is option 'B'. Can you explain this answer?
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Sodium thiosulphate is prepared bya)reducing Na2SO4 solution with H2Sb...
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Sodium thiosulphate is prepared bya)reducing Na2SO4 solution with H2Sb...
Preparation of Sodium Thiosulphate
Boiling Na2SO3 solution with S in alkaline medium is the correct method for preparing Sodium Thiosulphate. Let's understand how it is done:
- Firstly, a solution of sodium sulphite (Na2SO3) is taken in a flask.
- Then, sulphur (S) is added to the flask and the mixture is heated under alkaline conditions. The alkaline medium is provided by adding sodium hydroxide (NaOH) to the mixture.
- The reaction proceeds as follows:
Na2SO3 + S + 2NaOH → Na2S2O3 + H2O + Na2SO4
- After the reaction is complete, the mixture is filtered and the solid product, which is Sodium Thiosulphate (Na2S2O3), is obtained.
- The obtained Sodium Thiosulphate may be further purified by recrystallization.
Hence, boiling Na2SO3 solution with S in alkaline medium is the correct method for preparing Sodium Thiosulphate.
Boiling Na2SO3 solution with S in alkaline medium is the correct method for preparing Sodium Thiosulphate. Let's understand how it is done:
- Firstly, a solution of sodium sulphite (Na2SO3) is taken in a flask.
- Then, sulphur (S) is added to the flask and the mixture is heated under alkaline conditions. The alkaline medium is provided by adding sodium hydroxide (NaOH) to the mixture.
- The reaction proceeds as follows:
Na2SO3 + S + 2NaOH → Na2S2O3 + H2O + Na2SO4
- After the reaction is complete, the mixture is filtered and the solid product, which is Sodium Thiosulphate (Na2S2O3), is obtained.
- The obtained Sodium Thiosulphate may be further purified by recrystallization.
Hence, boiling Na2SO3 solution with S in alkaline medium is the correct method for preparing Sodium Thiosulphate.
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Sodium thiosulphate is prepared bya)reducing Na2SO4 solution with H2Sb)boiling Na2SO3 solution with S in alkaline mediumc)neutralising H2S2O3 solution with NaOHd)boiling Na2SO3 solution with S in acidic mediumCorrect answer is option 'B'. Can you explain this answer?
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