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Categories  >>  Sciences  >>  Chemistry  >>  Inorganic Chemistry
 
 


 

 
 Organic Chemistry interview questions  Organic Chemistry Interview Questions
 Inorganic Chemistry interview questions  Inorganic Chemistry Interview Questions
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Question
why we use sulphuric acid in the experiment of measure 
absorpance of K2Cr2O7 and KMnO4?
 Question Submitted By :: Ibrahim Ahmed Ibrahim
I also faced this Question!!     Rank Answer Posted By  
 
  Re: why we use sulphuric acid in the experiment of measure absorpance of K2Cr2O7 and KMnO4?
Answer
# 1
In case of Dichromate we use it to maintain the pH, otherwise
there is a mixture of Chromate and Dichromate. They donot
absorb at the same wavelength. So we cannot use Lambert-Beer's
Law.
For permanganate use of sulphuric acid is not for this reason
but to maintain the pH as in neutral or alkaline solution
permanganate get hydrolyzed to for manganese dioxide.
 
Is This Answer Correct ?    6 Yes 0 No
Sudipta
 

 
 
 
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