why we use sulphuric acid in the experiment of measure
absorpance of K2Cr2O7 and KMnO4?

Answer Posted / sudipta

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 ?    8 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

How a balanced equation can be used to find the mass or volume of an unknown quantity in a stoichiometry?

2026


What modification is required for the atomic theory in order to explain the existence of isotopes, and modern view of atomic nuclei and electrons?

1820


Give the IUPAC name for [Co(NH3)5Cl] SO4

597


what is the syllabus for mahagenco recruitment drive for the post of chemist

2658


What are the inorganic material eliminated in Sulphated Ash

2828






which cationic polymer is compatible with poly aluminium chloride?

2100


Give the IUPAC name for [Co(NH3)5SO4]Cl

738


write short note on steroids,terpenes,prostagladins,and phospholipids.

5600


why Nacl solution called as brine solution?

3287


How many moles of sodium hydrogen phosphate can be prepared from 3 mol of sodium hydroxide and phosphoric acid?

1906


Give lewis dot structure for HBrO4?

9267


composition of stainless steel

1410


What are common snowflake shapes?

2052


what is meant if aluminium sulfate contains 30% basicity?

1680


Why ammonia is used as buffer solution in estimation of copper by EDTA method

1361