How are gold number and protective power of colloid related?

Explanation

To understand the relationship between gold number and the protective power of a colloid, we can break down the concepts step by step.

### Step 1: Define Gold Number
The gold number is defined as the minimum amount of protective colloid (in milligrams) that must be added to 10 ml of a standard gold sol to prevent coagulation when 1 ml of a 10% NaCl solution is added.

### Step 2: Understand Protective Colloid
A protective colloid is a substance that stabilizes a colloidal solution and prevents the particles from coagulating or settling. The effectiveness of a protective colloid is referred to as its protective power.

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