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.
Text Solution
Verified by Experts
Amount of starch added to 100 mL of gold sol required to prevent coagulation of 1 mL of 10% `NaCl` solution `=0.25g` `or = 250 mg` Starch required to be added to 10mL of gold sol to completely prevent coagulation by 1 mL of `10%` `NaCl` solution `=250/100 xx 10 = 25 mg` `:.` Gold number of starch `= 25`
Topper's Solved these Questions
SURFACE CHEMISTRY
MODERN PUBLICATION|Exercise CONCEPTUAL QUESTION 1|14 Videos
SURFACE CHEMISTRY
MODERN PUBLICATION|Exercise CONCEPTUAL QUESTION 2|30 Videos
SOLUTIONS
MODERN PUBLICATION|Exercise UNIT PRACTICE TEST|14 Videos
Similar Questions
Explore conceptually related problems
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
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 10 ml of colloidal solution of gold is completely prevented by addition of 0.25 g of a substance "X" to it before addition of 1 ml of 10% NaCl solution. The gold number of "X" is
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 colloidal solution of gold is completely prevented by addition of 0.25 g of a substance "X" to it before addition of 1 ml of 10% NaCI solution. The gold number of "X"is :
The coagulation of 10cm^(3) of gold sol by 1 ml 10% NaCl solution is completely prevented by addition of 0.025g of starch to it. The gold number of starch is
MODERN PUBLICATION-SURFACE CHEMISTRY-COMPETITION FILE (OBJECTIVE TYPE QUESTIONS) (MATCHING LIST TYPE QUESTIONS)
