Why no indicator is used in the titration of potassium permanganate with standard sodium oxalate?

So one does not need an indicator to tell you the end point. Potassium Permanganate is an oxidizing agent, which is of deep violet colour. When used in redox titration, it get reduced into brown coloured Mn2+ ion(In acidic media) at end point and colour change at end point can be detected easily.

Which indicator is used in titration between KMnO4 and oxalic acid?

In burette – KMnO4 solution. In Conical flask – 10ml of oxalic acid + Sulfuric acid. Indicator – Self indicator (KMnO4) End Point – Appearance of permanent pale pink colour.

What indicator is used in the titration involving potassium permanganate and why?

Permanganate Titration EndpointA redox titration using potassium permanganate as the titrant. Because of its bright purple color, KMnO4 serves as its own indicator. Note how the endpoint is reached when the solution remains just slightly purple.

Why there is no need of indicator in this titration?

Some redox titrations do not require an indicator, due to the intense color of the constituents. For instance, in permanganometry a slight persisting pink color signals the endpoint of the titration because of the color of the excess oxidizing agent potassium permanganate.

Why nitric acid is not used in titration of oxalic acid with potassium permanganate?

Nitric acid is not used as it is itself an oxidising agent and hydrochloric acid is usually avoided because it reacts with KMnO4 according to the equation given below to produce chlorine and chlorine which is also an oxidising agent in the aqueous solution.

Why there is no indicator used in redox titration?

Why is no indicator used in a redox titration? – Quora. Certainly, there are indicators for redox reactions. However, often, because redox involves completely changing the electronic states of the an element that is often coloured, the chemicals themselves that are being oxidized or reduced serve as indicators.

Why is it not necessary to maintain the temperature at 60 C throughout the titration?

In order to expel the CO2 gas produced in the above reaction, the reaction mixture has to be kept hot so that the forward reaction is favoured. Hence the reaction mixture is warmed to 60-70 degree Celcius before starting the titration.

Why indicator is not used in Permanganometry?

Under these conditions permanganate ion oxidises iron(II) rapidly and reacts only slowly with chloride ion. For the titration of colourless or slightly coloured solutions, the use of an indicator is unnecessary, since as little as 0.01 mL of 0.02M potassium permanganate imparts a pale-pink colour to 100 mL of water.

Why don’t you need an indicator for the redox titration?

Redox titrations will involve a reducing and oxidizing agent reacting together, but indicator is normally not used like it is in acid-base titrations. This means that one of the reactants used has to be one with a color difference between its reduced and oxidized form.

Why is nitric acid not used in titration?

The acid used in this titration is dilute sulphuric acid. Nitric acid is not used as it is itself an oxidising agent and hydrochloric acid is usually avoided because it reacts with KMnO4 according to the equation given below to produce chlorine and chlorine which is also an oxidising agent in the aqueous solution.

Why we use oxalic acid in titration?

Since sodium hydroxide is not a primary standard a standard solution of oxalic acid is prepared and used for standardisation of sodium hydroxide. In acid base titration at the end point the amount of acid becomes chemically equivalent to the amount of base present.

Is potassium permanganate an indicator?

Potassium Permanganate is a versatile and powerful oxidant that can be used to determine many substances by direct or indirect titration. A unique advantage of Potassium Permanganate is that it serves as its own indicator. Titrations with Permanganate must be carried out in strong acid solution.