0
What else can I help you with?
Why is potassium permanganate used in titration experiment despite being a secondary standard solution?
kmno4 is very good oxidizing agent. that means it is easily reduced by any other reagent. so it can't be considered as primary standard as its concentration changes upon free leaving
What is the name of Mn(NO3)3?
The name of the polyatomic ion MN04 is permanganate. This type of solution is stable in neutral or slightly alkaline and is purple in color.
What is the importance of boiling KMnO4 solution if it is for future use?
If the potassium permanganate solution is prepared from stock solid potassium permanganate, it is important to remove manganese dioxide from the system. MnO2 catalytically decomposes permanganate into oxygen and lower ox. states manganese. Manganese dioxide is insoluble, whereas permanganate is very soluble. Boiling the solution would ensure that all solid permanganate had dissolved, and so little would be lost upon filtering out MnO2 (which remains insoluble at higher temperatures) The remaining solution will have a longer shelf-life due to the absence of the aforementioned decomposition catalyst. If the permanganate solution is required acidic, the use of a small amount of phosphoric acid can be effective. Typically, sulfuric acid is used in combination with permanganate as an acid oxidant. The problem being that sulfuric acid dissolves manganese and thus the catalyst becomes soluble, and difficult to remove. Stock acid solutions of permanganate have far reduced shelf-life. The addition of a small amount of phosphoric acid helps alleviate this. Manganese(ii) oxide reacts with acidified permanganate to form Manganese(iii) cations - these in turn precipitate from solution as manganese(iii)phosphate. Complex ions of manganese(iii) can also form with phosphate, and these partake roles in equilibrium resulting in their further deposition from solution. Once the phosphate complexes are removed by filtration of the hot acidified permanganate solution, the solution has a longer shelf-life.
Is potassium manganate and potassium permanganate the same?
Potassium manganate = K2MnO4 Potassium permanganate = KMnO4 It is important to quote the oxidation state of the compound. Potassium manganate could easily be potassium manganate (VI) as opposed to potassium manganate (VII) KMnO4 Potassium manganate (VI) K2MnO4 is a dark green compound made by fusing manganese (IV) oxide with potassium hydroxide. It is stable in basic solution In aqueous acidic solution it disproportionates to the manganate (VII) ion and manganese (IV) oxide.
What is a lyophillic solution?
A lyophillic solution is a type of colloidal solution where the dispersed particles are strongly solvated; in this case the solution is more stable.
Why is permanganate not a primary standard?
aqueous solutions are not stable for long
Why is potassium permanganate used in titration experiment despite being a secondary standard solution?
kmno4 is very good oxidizing agent. that means it is easily reduced by any other reagent. so it can't be considered as primary standard as its concentration changes upon free leaving
Why is permanganate estimation completed in acid?
it provides the H+ ions to catalyse the reaction
Why do permanganate titration should be done in acidic solution?
Permanganate titration should be done in an acidic solution because permanganate ion (MnO4-) is most stable in acidic conditions. In acidic solution, permanganate ion is reduced to manganese(II) ions (Mn2+) during the titration. This reaction helps in accurately determining the concentration of the substance being titrated.
Why is it advisable to prepare a slightly more concentrated solution of potassium permanganate when preparing its standard solution?
Preparing a slightly more concentrated solution of potassium permanganate for a standard solution ensures higher accuracy in the volumetric analysis. This allows for more precise measurements and reduces errors in the dilution process. Additionally, a concentrated solution is more stable and less prone to degradation over time, ensuring the standard solution remains reliable for a longer period.
What does xenic mean?
-noun Chemistry. Xenic acid is the aqueous solution of xenon trioxide, a stable weak acid and strong oxidizing agent.
What is the name of Mn(NO3)3?
The name of the polyatomic ion MN04 is permanganate. This type of solution is stable in neutral or slightly alkaline and is purple in color.
What is the importance of boiling KMnO4 solution if it is for future use?
If the potassium permanganate solution is prepared from stock solid potassium permanganate, it is important to remove manganese dioxide from the system. MnO2 catalytically decomposes permanganate into oxygen and lower ox. states manganese. Manganese dioxide is insoluble, whereas permanganate is very soluble. Boiling the solution would ensure that all solid permanganate had dissolved, and so little would be lost upon filtering out MnO2 (which remains insoluble at higher temperatures) The remaining solution will have a longer shelf-life due to the absence of the aforementioned decomposition catalyst. If the permanganate solution is required acidic, the use of a small amount of phosphoric acid can be effective. Typically, sulfuric acid is used in combination with permanganate as an acid oxidant. The problem being that sulfuric acid dissolves manganese and thus the catalyst becomes soluble, and difficult to remove. Stock acid solutions of permanganate have far reduced shelf-life. The addition of a small amount of phosphoric acid helps alleviate this. Manganese(ii) oxide reacts with acidified permanganate to form Manganese(iii) cations - these in turn precipitate from solution as manganese(iii)phosphate. Complex ions of manganese(iii) can also form with phosphate, and these partake roles in equilibrium resulting in their further deposition from solution. Once the phosphate complexes are removed by filtration of the hot acidified permanganate solution, the solution has a longer shelf-life.
Is potassium manganate and potassium permanganate the same?
Potassium manganate = K2MnO4 Potassium permanganate = KMnO4 It is important to quote the oxidation state of the compound. Potassium manganate could easily be potassium manganate (VI) as opposed to potassium manganate (VII) KMnO4 Potassium manganate (VI) K2MnO4 is a dark green compound made by fusing manganese (IV) oxide with potassium hydroxide. It is stable in basic solution In aqueous acidic solution it disproportionates to the manganate (VII) ion and manganese (IV) oxide.
What is observe when aqueous ammonia is added in excess to a silver chloride solution?
When aqueous ammonia is added in excess to a solution of silver chloride, the white precipitate of silver chloride dissolves to form a colorless, tetrahedral complex ion called [Ag(NH3)2]+. This complex ion is soluble in excess ammonia due to the formation of a stable coordination complex.
Why is there no reaction between potassium permanganate and alkanes?
Potassium permanganate is a strong oxidizing agent, but alkanes are not easily oxidized due to their stable C-C and C-H bonds. As a result, there is no reaction between potassium permanganate and alkanes under normal conditions.
Why pottasium permanganate solution kept for few days?
The permanganate solution has to cool and stand overnight before it can be filtered to remove MnO2 (manganese dioxide)Potassium permanganate is not a primary standard. It is difficult to obtain the substance perfectly pure and completely free from manganese dioxide. Moreover, ordinary distilled water is likely to contain reducing substances (traces of organic matter, etc.) which will react with the potassium permanganate to form manganese dioxide. The presence of the latter is very objectionable because it catalyses the auto-decomposition of the permanganate solution on standing. The decomposition:4MnO4- + 2H2O = 4MnO2+3O2+4OH-is catalysed by solid manganese dioxide. Permanganate is inherently unstable in the presence of manganese(II) ions:2MnO4-+3Mn2+ +2H2O = 5MnO2 + 4H+;this reaction is slow in acid solution, but is very rapid in neutral solution. For these reasons, potassium permanganate solution is rarely made up by dissolving weighed amounts of the highly purified (e.g., A.R.) solid in water; it is more usual to heat a freshly prepared solution to boiling and keep it on the steam bath for an hour or so, and then filter the solution through a non-reducing filtering medium, such as purified glass wool or a sintered glass filtering crucible (porosity No. 4).Alternatively, the solution may be allowed to stand for 2-3 days at room temperature before filtration. The glass-stoppered bottle or flask should bc carefully freed from grease and prior deposits of manganese dioxide: this may be done by rinsing with dichromate-sulphuric acid cleaning mixture and then thoroughly with distilled water. Acidic and alkaline solutions are less stable than neutral ones. Solutions of permanganate should be protected from unnecessary exposure to light; a dark-coloured bottle is recommended. Diffuse daylight causes no appreciable decomposition, but bright sunlight slowly decomposes even pure solutions.
