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0.00001g of gelatin is required to be added to 100cm3 of a standard gold sol to just prevent its coagulation by the addition of 1cm3 of 10% NaCl solution to it.hence the gold number of gelatin is

0.00001g of gelatin is required to be added to 100cm3 of a standard gold sol to just prevent its coagulation by the addition of 1cm3 of 10% NaCl solution to it.hence the gold number of gelatin is

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