Why sulphuric acid used in redox titration

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HCl itself may get oxidized by permanganate. Add a comment. Why is k2cr2o7 not self indicator? Potassium dichromate acts as oxidizing agent in acidic medium only. Thus an indicator is must in this titration. Huiying Renilla Explainer. Why phosphoric acid is added in redox titration? When the titration reaches the first equivalence point, the solution will contain the conjugate base H2PO This will give the solution a pH greater than seven at that equivalence point. Blasinda Uzbekov Pundit.

Why kmno4 is used in burette? But if kmno4 is taken in conical flask,it wolud be very difficult to observw the reaction completion. Sixto Bawvykin Pundit. Why is hydrochloric acid not used in potassium permanganate? KMnO4 is a very strong oxidizing agent and it can oxidize HCl to liberate chlorine gas, therefore HCl cannot be used to acidify potassium permanganate solution in volumetric analysis.

Dioni Milkau Pundit. Why is sulfuric acid added to the hydrogen peroxide? The reaction of hydrogen peroxide on concentrated sulfuric acid produces highly activated and oxidizing peroxymonosulfuric acid H2SO5 , also called Caro's acid [1].

Kenia Martinov Pundit. Why KMnO4 is added slowly in the titration? This is because the concentration is quite large. When you start the titration , the dark purple KMnO is slowly added into the sample you are titrating.

Phosphoric acid, also called orthophosphoric acid, H3PO4 , the most important oxygen acid of phosphorus, used to make phosphate salts for fertilizers. It is also used in dental cements, in the preparation of albumin derivatives, and in the sugar and textile industries. Why Sulfuric acid is used in redox titration instead of HCL? As dilute sulfuric acid is ideal for redox titration because it is neither an oxidizing agent and nor a reducing agent.

Why is phosphoric acid a weak acid? The more stable a conjugate base is, the higher the tendency for the acid to lose a proton and to transition into its conjugate base. Why h3po4 is added when diphenylamine is used as an indicator? Diphenylamne is used as an indicator because it shows a very clear color change from green to violet when end point of the titration is reached. Why do we heat oxalic acid before titration? The thing is, the reduction of permanganate to manganese ions is autocatalytic, meaning the product of this reaction speeds up the reaction.

The heating is needed to produce at least some amount of manganese ions and then the reaction is fast enough at room temperature. The last drop of permanganate gives a light pink colour on reaching the endpoint. Titrations with Permanganate must be carried out in strong acid solution. Sulfuric Acid is generally used for this purpose because Nitric Acid and Hydrochloric Acid can participate in competing oxidation-reduction reactions, reducing the accuracy of the titration.