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Q.

In a textile industry, chlorine is used to bleach fabrics. Any of the toxic chlorine that remains after the bleaching process is destroyed by reacting it with a sodium thiosulphate solution. If 52.7kgNa2S2O3  is consumed to remove the chlorine what is the mass of the sulphur product formed in kilograms. (round to nearest integer)
 At wts : Na = 23, Cl = 35.5, S =32, O = 16, H = 1
 

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answer is 80.

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Detailed Solution

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 Na2S2O3158+4Cl2+5H2O2NaHSO4240+8HCl
If 158kg  of Na2S2O3   is consumed 240kg  of   NaHSO4 will be formed 
If 52.7kg  of Na2S2O3  is consumed the wt of product formed is  52.7×240158=80.05kg
=80kg
 

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