Question

A substance of crude copper is boiled in H_(2)SO_(4) till all the copper has reacted.The impurities are inert to acid.The SO_(2) liberated in the reaction is passed into 100mL of 0.4M acidified KMnO_(4) .The solution KMnO_(4) after passage of SO_(2) is allowed to react with oxalic acid and requires 23.6mL of 1.2M oxalical If the purity of copper is 91% what was the weight of the sample. ​

Answer 1

Answer:

substance of crude copper is boiled in

till all the copper has reacted. The impurites are inert to acid. The

liberated in the reaction is passed into

of

acidified

. The solution of

after passage of

is allowed to react with oxalic acid and requireds

of

oxalic acid. IF the purity of copper is

what was the weight of sample?

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Text Solution

Answer :

$5.06 \: g$