Question

what is Gold Number ? With example.​

Answer 1

Answer:

Gold Number is a term used in colloidal chemistry. It is defined as the minimum amount of protective colloid in milligrams which prevents a color change from red to violet of 10ml gold sol by the addition of 1 ml of 10%NaCl solution.

Explanation:

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Answer 2

Gold numbers are as follows:

• The gold number is characterized as the minimum quantity of lyophilic colloid in milligrams that prevents the flocculation of 10ml gold sol by adding 1 ml of 10% NaCl solution. The theory of gold number was delivered by Zsigmondy. Coagulation of gold sol is demonstrated by a colour difference from red to blue when particle size just boosts. More is the gold number, small will be the protecting power of the lyophilic colloid since it suggests that the amount expected is more. The quantity is taken in phrases of weight in milligrams.
• For an ex- gold number of gelatine = 0.005 – 0.01 and haemoglobin = 0.03 – 0.07. The gold number is an experimentally inferred quantity.