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Gold sol can be prepared by
- a)Hydrolysis of AUCl3
- b)Oxidation of Gold by aqua-regia
- c)Peptization
- d)Reduction of AUCl3 with HCHO solution.
Correct answer is option 'D'. Can you explain this answer?
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Gold sol can be prepared bya)Hydrolysis of AUCl3b)Oxidation of Gold by...
2AuCl3 + 3HCHO + 3H2O → 2Au + 3HCOOH + 6HCl
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Gold sol can be prepared bya)Hydrolysis of AUCl3b)Oxidation of Gold by...
Reduction of AUCl3 with HCHO solution
AUCl3 can be reduced to Gold sol by using formaldehyde (HCHO) solution. This process involves the following steps:
Preparation of AUCl3 solution:
- Firstly, a solution of AUCl3 is prepared by dissolving gold trichloride in water.
Reduction with HCHO solution:
- Formaldehyde (HCHO) solution is then added to the AUCl3 solution under controlled conditions.
- The reduction of AUCl3 by formaldehyde leads to the formation of Gold sol.
- This reaction involves the transfer of electrons from formaldehyde to AUCl3, resulting in the reduction of gold ions to form Gold sol.
Characteristics of Gold sol:
- Gold sol is a colloidal solution of gold nanoparticles dispersed in a solvent.
- It exhibits unique optical properties due to the presence of nanoparticles, such as the red color observed in solutions of Gold sol.
Applications of Gold sol:
- Gold sol finds applications in various fields, including catalysis, electronics, and medicine.
- It is used in the preparation of nanomaterials and as a catalyst in organic synthesis reactions.
In conclusion, the reduction of AUCl3 with HCHO solution is an effective method for the preparation of Gold sol, which has diverse applications in different industries.
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Gold sol can be prepared bya)Hydrolysis of AUCl3b)Oxidation of Gold by aqua-regiac)Peptizationd)Reduction of AUCl3 with HCHO solution.Correct answer is option 'D'. Can you explain this answer?
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