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give reason why leather getts hard after tanning ?

Posted by Vineet Kumar Gupta 7 years, 10 months ago

CBSE > Class 12 > Chemistry

4 answers

Unique Person Arupitw 7 years, 10 months ago

K2cr2o7is used for tanning of leather as it is an oxidizing agent

Unique Person Arupitw 7 years, 10 months ago

Animal hides are positively charged colloidal.when it is shocked in tanin which contains negatively charged colloidal particles then mutual coagulation take place this results in hardening of leather

Vineet Kumar Gupta 7 years, 10 months ago

Thanks bhavna

Bhavna Shukla 7 years, 10 months ago

Animal hides are colloidal in nature. When a hide, which has +vely charged particles, is soaked in tannin which contains -vely charged colloidal particles, mutual coagulation takes place. This result in hardening of leather.

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