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Gold number of Gum Arabic is 0.15. The a...

Gold number of Gum Arabic is 0.15. The amount of Gum Arabic required to protect 100 mL of red gold sol from coagulation by 10 mL of 10% NaCl solution is

A

0.15m mol

B

0.15mg

C

1.5m mol

D

1.5mg

Text Solution

Verified by Experts

The correct Answer is:
D
Gold number is the minimum amount of lyophilic colloid in milligrams which prevents the coagulation of 10 mL gold sol against 1 mL of 10 % NaCI Therefore 1.5 mg will be used
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