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Q.

What is gold number in chemistry?

Asked by dare devil, 04 Dec '09 12:51 pm
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Answers (5)

 
1.

Gold number (a measure of the efficacy of a protective hydrophilic sol material like gelatin or starch) is the number of milligrams of the dry hydrophilic colloid to be added to 100 ml of a standard gold sol to prevent its precipitation(noted by a change from red to blue) by the rapid addition of 1ml of 10 % sodium chloride solution. Smaller the value higher is the protective action.
Answered by Arakuzha Ramachandran, 06 Dec '09 04:21 pm

 
  
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2.

Actually it is used measure the strength of coliodal material.you will find it any good 10+2 level chemistry book in coloed chapter
Answered by bijay tharani, 05 Dec '09 12:49 pm

 
  
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3.

Aurum 79
Answered by babu rao, 04 Dec '09 01:23 pm

 
  
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4.

Au-79
Answered by ala, 04 Dec '09 12:54 pm

 
  
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5.

Au ..72 i guess
Answered by thyagarajan mahadevan, 04 Dec '09 12:52 pm

 
  
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