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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: MDC lab on July 30, 2020, 02:56:08 AM

Title: Na2S to Na2S2O3 oxidation
Post by: MDC lab on July 30, 2020, 02:56:08 AM

i have a sodium sulfide aqueous solution and i want to change in sodium thiosulphate by only air oxidation.
for this i make sodium sulfide solution and leave for air oxidation for 6 hour.
after this i analyse both solution but  nothing find any reducing compound (Na2S2O3 ) after oxidation.
any suggestion

Title: Re: Na2S to Na2S2O3 oxidation
Post by: chenbeier on July 31, 2020, 01:44:32 PM

You have to add sulfurdioxide SO₂.
Oxygen will not oxidate it.

Title: Re: Na2S to Na2S2O3 oxidation
Post by: MDC lab on August 01, 2020, 02:44:51 AM

Quote from: chenbeier on July 31, 2020, 01:44:32 PM

You have to add sulfurdioxide SO₂.
Oxygen will not oxidate it.

thank you so much