why kmno4 act as a self indicator?
56405
When used as a titrant, as soon as the endpoint is reached and the KMnO4- is in excess, the solution has a permanent pink hue (provided that the solution is initially colorless). Thus KMnO4 acts as its own indicator. ... KMnO4 acts as a self indicator because of its deep violet color which is highly visible to naked eye.
616232
The permanganate ion (which itself is covalent) would be non-polar. It is tetrahedral in shape and has resonance between all the Mn to O bonds.
478316
When MnO2 is fused with KOH in the presence of KNO3 as an oxidizing agent, it gives a dark green compound (A).
36473
C2O4 is a weak field ligand. It causes a small splitting of energy levels. Hence, it is energetically more favorable for the electrons to occupy eg level instead of pairing up with t2g level.
330691
By convention, when a cell is written in shorthand notation, its emf is given a positive value if the cell reaction is spontaneous. That is, if the electrode on the left forces electrons into the external circuit and the electrode on the right withdraws them, then the dial on the voltmeter gives the cell emf.
199346
When a solution of ethyl alcohol and alkaline KMnO4is heated the pink colour of the solution disappears. Since, KMnO4 is a strong oxidising agent it oxidises ethanol to ethanoic acid by donating nascent oxygen. If excess of KMnO4 is added the the purple color will persist.
244927
Looking at the products, the Mn2+ ion now has oxidation number +2. This decrease in the oxidation number tells us that the Mn atom has been reduced. Therefore, the compound in which it is found (MnO2) is the oxidizing agent!
33056
The Kh value is 0. 0158_. The NH4OCl is a salt of weak acid and weak base and hydrolyses upto very small extent.
325625
When potassium chlorate (KClO3) is heated in the presence of manganese dioxide catalyst, it decomposes to form potassium chloride and oxygen gas. Represent this in the form of a balanced chemical equation.
975616
A mixture of several indicators which shows different colours at different concentrations of hydrogen ions in a solution is an universal indicator. The substance which indicates the presence of an acid or base by changing its odour in a solution is an olfactory indicator. Example-onion juice, clove oil.
822800
What is potassium permanganate? Potassium permanganate is an oxidising agent with disinfectant, deodorising and astringent properties. Its chemical formula is KMnO4. It is sometimes called by its common name, Condy's crystals.
66042
A non-spontaneous reaction has a positive delta G and a small K value. When delta G is equal to zero and K is around one, the reaction is at equilibrium. You have learned the relationship linking these two properties. This relationship allows us to relate the standard free energy change to the equilibrium constant.
62733
In non-competitive inhibition, the Km does not change. This is because Km is a measure of the affinity of the enzyme for its substrate and this can only be measured by active enzyme. The fixed amount of inactive enzyme in non-competitive inhibition does not affect the Km and the Km, therefore is unchanged.
487502
Some chemical reactions are very sensitive to the exact amount of reagents used otherwise the reaction will not work properly. ... Once the exact concentration has been determined, the solution is said to be standardized and you can then add exact amounts of the KMnO4 to a chemical reaction.
813785
Yes, the answer to the above question can be given on the basis of the oxidation state. ... Higher oxidation states are short of electrons, meaning they can accept lone pairs and function as Lewis acids. MnO has the lowest oxidation state, so it is the most basic and finally Mn2O7 (which is actually acidic).
1052104
The SI base unit for amount of substance is the mole. 1 grams KMnO4 is equal to 0.0063277542979072 mole.
1271060
Another reaction that alkenes undergo is oxidation. When a purple solution of the oxidizing agent KMnO4 is added to an alkene, the alkene is oxidized to a diol and the KMnO4 is converted to brown MnO2. ... Alkanes and aromatic compounds do not react with potassium permanganate.