Question

ay What is gold number? Explain its
significance.
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Answer 1

Answer:

Gold Number is the amount (in milligrams) of a protective colloid which is just sufficient to prevent the coagulation of 10 ml of a standard hydro gold sol when 1 ml of 10% NaCl solution is added to it.

Answer 2

Answer:

Gold Number is a term used in colloidal chemistry. It is defined as the minimum amount of lyophilic colloid in milligrams which prevents the flocculation of 10ml gold sol by the addition of 1 ml of 10%NaCl solution.

Explanation:

Gold Number is the amount (in milligrams) of a protective colloid which is just sufficient to prevent the coagulation of 10 ml of a standard hydro gold sol when 1 ml of 10% NaCl solution is added to it. Coagulation of gold sol is indicated by colour change from red to blue/purple when particle size just increases.