On addition of 1 mL solution of 10% NaCl to 10 mL gold sol in the presence of 0.0250 g of starch, the coagulation is just prevented. What is the gold number of starch?

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

50 ml of standard gold sol needs 0.05 mg of gelatine for its protection from coagulation - Calculate gold number of gelatine.

1.0 g Mg burnt is a closed vessel which contains 0.5 g of O_2 . Which is the limiting reactant ? What is the Mgo formed in the reaction ?

For coagulation of 1000 ml of Arsenious sulphide sol, 50 ml of 1 (M) NaCl is required.What is the coagulation value of NaCl?

For coagulation of 50 ml of arsenious sulphide sol, 2.5 ml of 1 M NaCl is required. What is the flocculation value of NaCl ?

For the coagulation of 10 mL of Fe(OH)_3 sol, 2 mL of 1 M KBr is required. What is the flocculating value of KBr?

When 1.0 ml of dil H_2SO_4 is added to 100 ml of a buffer solution of pH :

50 ml of N/10 NaOH. solution, 100 ml of N/5 NaOH solution and 500ml of N/2 NaOH solution are mixed together. What is the strength of the resultant solution?