Question

Gold number is used to show of

Answer 1

Answer:

Coagulation of gold sol is indicated by colour change from red to blue/purple when particle size just increases. More is the gold number, less is the protective power of the lyophilic colloid since it means that the amount required is more. It was first used by Richard Adolf Zsigmondy.

Answer 2

The gold number is used to show the minimum amount of protective colloid.

• The gold number reliably calculates the bare minimum volume of a colloid's reversible lyophilic preventive coating.
• It is calculated on the lyophobic by liquid heating particles like the ordinary gum, or gelatin.
• The gold number also prevents the colour change of 10 ml of precious gold by including ten percent of sodium chloride solution.