Admin Table of Contents
- 1 Why do we add dilute H2SO4 in KMnO4 titration?
- 2 Why HCl and HNO3 is not used in KMnO4 titration?
- 3 Why is H2SO4 preferred over HCl?
- 4 Why feso4 is not used in titration?
- 5 Why KMnO4 Cannot be acidified using HCl?
- 6 Why don’t we use HCl instead of h2so4 in titration?
- 7 Why is dilute H2SO4 preferred over dil HCl during anions?
- 8 Which anions can be detected by Dil H2SO4?
- 9 Why do we add dilute H2SO4 in titration of KMnO4 with oxalic acid?
- 10 Which is stronger, oxalic acid or KMnO4?
- 11 Which is stable sulfuric acid or H2SO4?
Why do we add dilute H2SO4 in KMnO4 titration?
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.
Why HCl and HNO3 is not used in KMnO4 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 is dilute sulfuric acid suitable for permanganate titration?
Ans: For HCl, the chloride ion will be oxidised to chlorine gas by manganate (VII) ion. Lastly, permanganate cannot oxidize sulfate ion and sulfuric acid is not an oxidizing agent. Therefore, sulfuric acid is the mineral acid of choice for manganate (VII) titrations.
Why is H2SO4 preferred over HCl?
Hence,the number of H+ ions produced by H2SO4 is higher and easily replace with other compounds. It is possible for these acids to form more than one type of salt. Thus, decrease in the H+ concentration mean lower the PH value, which greatly reduce H2SO4 ‘s strength than HCL.
Why feso4 is not used in titration?
FeSO4 easily oxidises to Fe2(SO4)3 especially when it is dissolved in water to make a solution. The titration involves the coversion of Fe2+ to Fe3+ and the conversion will give an error in the determination.
Why H2SO4 is used for acidification of KMnO4 solution and not HCl?
Sulfuric acid is used because it is stable towards oxidation; whereas, for example, hydrochloric acid would be oxidized to chlorine by permanganate.
Why KMnO4 Cannot be acidified using HCl?
KMnO4 is strong oxidizing agent and it oxidize HCl. Permanganate will react with hydrochloric acid to liberate chlorine. Hence HCl is not used to acidify a permanganate solution in volumetrically.
Why don’t we use HCl instead of h2so4 in titration?
HCl and HNO3 are not used in the titration of Mohr’s salt in place of sulfuric acid because: HCl is a mild reducing agent and it reacts with some of the indicator that is KMnO4 solution so the final value of the indicator used come to be more than the actual value disturbing the experiment.
Why sulfuric acid is used in redox titration instead of HCl?
HCl and HNO3 are not used in the titration of Mohr’s salt in place of sulfuric acid because: As dilute sulfuric acid is ideal for redox titration because it is neither an oxidizing agent and nor a reducing agent.
Why is dilute H2SO4 preferred over dil HCl during anions?
Ans. When the salt is treated with HCl, during reaction HCl gas is also given out along with the gas evolved by the salt. So the actual gas cannot be identified whereas with H2SO4, no such problem arises.
Which anions can be detected by Dil H2SO4?
The anions which are detected with the dilute h2so4 acid are carbonates, sulphites, and sulphide. Explanation: About 2 ml of h2so4 is mixed with salt and heated. Colorless gas evolved hence presence of carbonate.
Why do we titrate Mohr salt and not FeSO4 with KMnO4?
Potassium permanganate is a strong oxidant in the presence of sulfuric acid. In this titration Mohr salt acts as a reducing agent and potassium permanganate acts as an oxidising agent. So, the reaction between Mohr’s salt and potassium permanganate is a redox reaction.
Why do we add dilute H2SO4 in titration of KMnO4 with oxalic acid?
Sign up for Ahrefs Webmaster Tools. It is bcz KMnO4 act as oxidising agent only in acidic medium.so, inorder to provide acidic medium dilute sulphiric acid is added. The titration is between oxalic acid and potassium permanganate, with H2SO4 H X 2 S O X 4 added to oxalic acid.
Which is stronger, oxalic acid or KMnO4?
As you may know, HCl is much stronger than Oxalic acid, it will react with KMnO4 to produce the corresponding chlorides of Potassium and Manganese along with liberation of Chlorine gas. This results in deficiency of total amount of KMnO4 available for the reaction with Oxalic acid, thereby affecting your redox titration. Hope this helps.
Why can’t we use HCl instead of H2SO4?
The nitronium ion that actually reacts to carry out nitrations will also tend to react with the chloride ions that HCl creates: …thus damaging your yields. It should be noted, however, that many nitrations can be carried out using pure nitric acid of a very high concentration.
Which is stable sulfuric acid or H2SO4?
H2SO4 increase the acidic content of the solution so as to prevent MnO4 (purple) to reduced to MnO2 (dark brow). Hence sulfuric acid is stable in the present of strong oxidising agent.