The coagulatin of 100 mL of `10%` NaCl solution. Find out of gold number of starch.

The coagulation of 100 mL of a colloidal solution of gold is completely prevented by the addition of 0.030 g of it before adding 1 mL of 10% NaCl solution. Find out the gold number of starch?

The coagulation of 200 ml of a colloidal solution of gold is completely prevented by adding 0.50 gm of starch to it before adding 1 ml of 10% NaCl solution. Calculate the gold number of starch.

0 . 25 g lyophillic colloid is added to 100 ml gold solution to prevent the coagulation on adding 1 ml 10% NaCl Solution . What will be gold number of tyophilic colloid ?

The cogulation of 100 mL of colloidal solutionof gold is completely prevented by additionof 0.25 g of substance "X" to it before addition of 1 mL of 10% NaCl solution. The gold number of substance 'X' is :

The coagulation of 100mL of a colloidal solution of gold is completely prevented by adding 0.25g of starch to it before adding 10mL of 10%NaCl solution. The gold number of starch is

In a colloidal state, the particle size of he dispersed phase ranges between 10^(3) to 10^(6) pm and the colloidal sol is of heterogeneous nature. Depending upon the ease with which these sols are formed, the colloidal sols are cassified as lyophilic and lyophobic. THe stability of a colloidal sol is due to the presence of charge on the sol particles and the neutralisation of the same is known as coagulation or precipitation. The coagulationg power of the active ions of he electrolytes can be compared with the help of Hardy-Schulze Law. The protecting power of the lyophilic sols can be compared with the help of gold number. Lesser the value of gold number, more will be the protecting power of the lyophilic sol. 0.025 g of starch sol is required to prevent the coagulatio of 10 mL of gold sol when 1 mL of 10% NaCl solution is present. The gold number of strach sol is :