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Why the oxidation reduction titration must be in acidic medium?
Wiki User
∙ 15y ago
Hydrogen ion (acid) has extra electrons which can be donated so the reaction can take place, whereas oxygen can accept those ions to form water in the product. That's why redox reactions always start of in a acidic solution and end up in a neutral/basic solution.
Wiki User
∙ 15y ago
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How do you detect the equivalence point in acidic medium?
By titration (manual or electrochemical) with a base and an indicator.
Why titration of potassium permanganate is carried out in acidic medium?
This is because in acidic medium kmn04 decomposes to give Mn2+ ions which impart pink colour to the solution. The reaction being Mno4- +8H+5e ----->Mn2+ + 4H2O
What would have happened if sulfuric acid was not add in spectrophotometric titration?
H2SO4 is added in reaction because acidic medium is required and it provides proton to the reaction .
Why is the pH of the medium important in edta titration?
why is the pH of the meadium important in EDTA titration
Why nitric acid is used in volhard method?
The titration must be done in acidic medium to prevent the precipitate of Iron(III) as hydrated oxide (iron hydroxide). Iron (III) is an indicator.
Why the oxidation reduction titration must be in basic medium?
It is not mandatory; acids are also titrated.
How do you detect the equivalence point in acidic medium?
By titration (manual or electrochemical) with a base and an indicator.
Why titration of potassium permanganate is carried out in acidic medium?
This is because in acidic medium kmn04 decomposes to give Mn2+ ions which impart pink colour to the solution. The reaction being Mno4- +8H+5e ----->Mn2+ + 4H2O
Why was an acid added to the iron II ammonium solution before titration?
To create an acidic medium or in another word made iron (II) ammonium solution more acidic as kmno4 acts as a strong reducing agent only in acid medium.
What would have happened if sulfuric acid was not add in spectrophotometric titration?
H2SO4 is added in reaction because acidic medium is required and it provides proton to the reaction .
Why is the pH of the medium important in edta titration?
why is the pH of the meadium important in EDTA titration
Why nitric acid is used in volhard method?
The titration must be done in acidic medium to prevent the precipitate of Iron(III) as hydrated oxide (iron hydroxide). Iron (III) is an indicator.
Why is an acidic titration medium a requirement of the vol hard?
volhard method uses Fe indicator. in the basic solution, Fe ion can precipitate forming Fe(OH)3 ...ete..
Why methyl orange used in the titration?
Methyl Orange is used as an indicator in a titration.It helps us to know the end point of a titration and when do we stop adding the acid or the base. It is yellow in bases,orange in neutral compounds(thats the colour of methyl orange at the end point) and red in an acidic medium.
Why do we add dilute sulphuric acid to dissolve mohr's salt?
For preparation of standard solution of Mohr salt {FeSO4.(NH4)2SO4.6H2O}, it's necessary to add dilute H2SO4 to prevent the Fe2+ ions of Mohr salt solution from undergoing oxidation (to Fe3+). Just try to prepare the standard solution without adding this acid. You'll observe that your "Mohr solution" will become yellow in colour, i.e., it won't remain "Mohr salt solution" anymore, hence can't be used in titration. And while doing the titration of the Mohr salt solution with KMnO4 (or even with K2Cr2O7), you need to add dilute H2SO4. The reason is well explained by the chemical equation involved: reduction: (MnO4)- + 8H+ + 5e ----> Mn2+ + 4H2O oxidation: Fe2+ ----> Fe3+ + e net equation: (MnO4)- + 8H+ + 5Fe2+ ----> Mn2+ + 4H2O + 5Fe3+ There is involvement of H+ ions in this reaction. This redox titration requires acidic medium. Moreover, KMnO4 acts as a very good oxidizing agent in the presence of acidic medium, than in the basic and neutral medium. NOTE: Now a query may arise that for providing acidic medium, can HCl or HNO3 be used? (Let me tell you it's one of the favourite questions of external examiners) The answer is NO, because HNO3 is a very strong oxidizing agent. So, the Fe2+ present will be oxidized both by KMnO4 and HNO3, which will result in an error in determination of volume of KMnO4 reacting with Mohr salt solution. Also, HCl can't be used because Cl- from HCl will be oxidized by KMnO4: HCl (aq) ---> H+ (aq) +Cl- (aq) oxidation by KMnO4=> 2Cl- ----> Cl2 + 2e So, some extra KMnO4 will be used up because it will oxidize both- Cl- as well as Fe2+, => error in titration.
Why oxalic acid is acidified before titration?
for medium produce
What is the pH of filler?
It is a acidic medium . . .
