(i)Why does leather get hardened after tanning ? (ii) On the basis of Hardy-Schulze rule explain why coagulating power of phosphate is higher than chloride. (iii) Do the vital functions of the body such as digestion get affected furing fever ? Explain your answer.

(i)Why does leather get hardened after tanning ? (ii) On the basis of

1.	(i)Why does leather get hardened after tanning ? (ii) On the basis of Hardy-Schulze rule explain why coagulating power of phosphate is higher than chloride. (iii) Do the vital functions of the body such as digestion get affected furing fever ? Explain your answer.
Answer» SOLUTION :(i) Animal hides are colloidal in nature having positively charged particles. When SOAKED in tannin, which contains negatively charged collodal particles, mutual-coagulation OCCURS. (ii) According to hard-Schulze rule, greater the valency of the flocculating ion added, greater is its power to cause coaguolation or precipitation. Phosphate ion `(PO_(4)^(3-))` has greater charge than chloride ion `(Co^(-)).` HENCE, `PO_(4)^(3-)` ion has greater coagulationg power.