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Why should the magnesium dioxide precipitate be filtered from the potassium permanganate solution?
Filtering the magnesium dioxide precipitate from the potassium permanganate solution helps to separate the solid from the liquid, providing a clear solution free of impurities. This filtration process ensures the purity of the solution and prevents any interference in subsequent reactions or analyses that may be performed with the potassium permanganate solution.
Why does the color of potassium permanganate not disappear when excess of ethanol is added to it?
The color of potassium permanganate does not disappear when excess ethanol is added because ethanol is unable to fully reduce the permanganate ion (MnO4-) to colorless manganese dioxide (MnO2). Ethanol is a weak reducing agent and is not capable of completely reducing the permanganate ion in this reaction. Additionally, the reaction between potassium permanganate and ethanol is not stoichiometric, meaning that there is an excess of one of the reactants, which can also contribute to the color persisting.
What is titration and what is the purposeof titration?
Titration is the process of determining the concentration of a substance of a given solution using a known reagent. So types of titrations are neutralization titrations, red-ox titrations, gravimetric titrations and colorimetric titrations. According to the reagents available, the best type of titration should be determined.
What is the control variable in titration?
In a titration experiment, the control variable is the volume of the titrant added to the analyte solution at each step. This volume should be kept consistent throughout the experiment to ensure accurate and reliable results.
An acidic solution has the pH balance of?
It should be between 2-5 in the ph scale if dissolved in water
Why should the magnesium dioxide precipitate be filtered from the potassium permanganate solution?
Filtering the magnesium dioxide precipitate from the potassium permanganate solution helps to separate the solid from the liquid, providing a clear solution free of impurities. This filtration process ensures the purity of the solution and prevents any interference in subsequent reactions or analyses that may be performed with the potassium permanganate solution.
Why does the color of potassium permanganate not disappear when excess of ethanol is added to it?
The color of potassium permanganate does not disappear when excess ethanol is added because ethanol is unable to fully reduce the permanganate ion (MnO4-) to colorless manganese dioxide (MnO2). Ethanol is a weak reducing agent and is not capable of completely reducing the permanganate ion in this reaction. Additionally, the reaction between potassium permanganate and ethanol is not stoichiometric, meaning that there is an excess of one of the reactants, which can also contribute to the color persisting.
What is titration and what is the purposeof titration?
Titration is the process of determining the concentration of a substance of a given solution using a known reagent. So types of titrations are neutralization titrations, red-ox titrations, gravimetric titrations and colorimetric titrations. According to the reagents available, the best type of titration should be determined.
What is the control variable in titration?
In a titration experiment, the control variable is the volume of the titrant added to the analyte solution at each step. This volume should be kept consistent throughout the experiment to ensure accurate and reliable results.
An acidic solution has the pH balance of?
It should be between 2-5 in the ph scale if dissolved in water
How to prepare a 0.2N KMnO4 solution?
Formula weight of KMnO4 is 158.04. The equivalent weight depends on the reaction involved. In acidic media it is (formula weight) /5, in neutral although this is more difficult to control it is the formula weight. Knowing which type it is usually acidic as it is easier, you will need 158.04/5 X 0.2 = 6.32g. Sulfuric acid is usually added in the titration to ensure the correct oxidation reaction is carried out. Also note KMnO4 is not considered a primary standard so you should really filter the solution to remove any MnO2 caused by oxidation of organic impurites in the water you are using, and standardise the solution by titration against say oxalic acid. K
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.
How can pH of a solution be tested?
By dissolving the pH solution a colour change will occur in the solution that should be tested.Compairing the colour of solution to the colours marked on of pH chart we can find out if the solution we tested is of alkaline nature or of acidic nature or neutral.Solutions of pH7are neutral solutions.Solutions below pH7 are acidic solutions and those above pH7 are alkaline solutions.
If you are trying to create a neutral salt from a base by adding an acid but the pH indicator indicates that the solution is now acidic what should be your next step?
add a base to the solution
Why should enough KHT be added to the KCl-NaCl solution to ensure that some solid remains undissolved after the 20 minute stirring?
Adding enough KHT ensures that a saturated solution is formed, which is necessary to determine the endpoint of the titration accurately. Some solid should remain undissolved after the 20-minute stirring to ensure that all the KCl has reacted with the silver ions before titration begins.
When should back titration used instead of back titration?
when we do not know nothing about the other titrant.
If ammonia has an acidic solution of ph12 then how many more acidic solution does household bleach has with a ph13?
The difference in Hydrogen ion concentration between pH12 an pH13 is 10 fold. But, no one should consider a solution with a pH of 12 an "acidic solution". Anything above pH 7 is a basic or alkaline solution.
