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Potassium dichromate, also known as an hydrochromate, is made by adding a moderate amount of one of the stronger acids to a solution of neutral yellow potassium chromate. Potassium permanganate is made commercially by combining potassium hydroxide and granulated manganese oxide with oxidizers such as potassium chlorate.
On the other hand, KMnO4 is the chemical formula for potassium permanganate, an inorganic molecule. Because it comprises two particles, K+ and MnO4–, the chemical is potassium salt. The oxidation state of manganese metal is +7. At room temperature, the compound is a dark purple strong chemical that occurs in the strong form. It’s also an important medication for wound healing.
Preparation and properties of K2Cr2O7 and KMnO4
When a core ion is surrounded by molecules or ions that have a single pair of electrons, a complexion is created. The transition metal may attract the ligand’s lone pair of electrons because of its comparatively high charge and tiny size. A coordinate bond is used to link these “ligands.” To build a covalent connection, a coordinate bond makes use of a single pair of electrons. A ligand is a chemical compound that forms a coordinating connection with a metal ion by using a single pair of electrons.
Potassium Dichromate
Two potassium cations and one dichromate anion make up potassium dichromate, which is an ionic compound. The chromium atoms are surrounded by tetrahedral coordination geometries.
The potassium chromate ion has a tetrahedral shape, but the dichromate ion is made up of two tetrahedra that share a corner and have a Cr–O–Cr bond angle of 126°. The volumetric analysis makes use of potassium dichromate as an oxidising agent. It is used on a large scale in mordant dyes, the leather industry, and cleaning glassware, among other things.
Properties of Potassium Dichromate
It oxidises iodide to iodine and is classified as a potent oxidising agent.
The brilliant red crystals in the compound can be used for dyeing, tanning, colouring, and other purposes.
It can be antibacterial, corrosive, and astringent in medicinal applications. It emits poisonous chromium fumes when heated.
It can be employed in wood preservatives, pigment manufacture, and photochemical processes since it is a powerful oxidising agent and very corrosive.
Applications of Potassium Dichromate
The potassium chrome alum preparation, which is widely used in leather tanning, is the most important use of K2Cr2O7. From this chemical, chromic acid is made. Furthermore, potassium dichromate is widely utilised in the cement industry because it enhances the texture and density of the cement mixture.
Potassium Permanganate
It’s a tetrahedral complex chemical, potassium permanganate. It’s used to make chlorine gas and other oxidation processes on a laboratory scale. It’s utilised in disinfectants, Baeyer’s reagent, and other oxidising processes on an industrial basis.
MnO2 is combined with an alkali metal hydroxide and an oxidising agent (O2 or KNO3) to create this compound. In a neutral or acidic solution, the reaction yields dark green K2MnO4, which disproportionates to generate permanganate.
Properties of Potassium Permanganate
When potassium permanganate is heated, oxygen, manganese dioxide, and potassium manganate are produced.
It is a strong oxidising agent in both alkaline and acidic solutions.
It is non-combustible yet acts as a catalyst when combustible materials are burned.
It comes in the shape of purple crystals that dissolve in hot water.
It can be harmful at high concentrations.
It will spark a fire when combined with glycerine.
Application of Potassium Permanganate
Potassium permanganate is applied as a moist treatment on blistering or seeping pus sores on the skin’s surface. Athletes’ feet and impetigo are two conditions that can affect athletes. These are examples of bacterial and fungal skin illnesses that potassium permanganate can aid with.
Difference between Potassium Dichromate and Potassium Permanganate
In addition, potassium permanganate is a powerful oxidizer. It’s a water solvent that produces pink or purple-hued arrangements after being dissolved in water. The dispersion of water from this arrangement produces dull purple precious stones that flicker.
Furthermore, this molecule is a solid oxidant with no hazardous side effects. As a result, it is particularly useful in a variety of applications. Medication, water treatment, natural mixes union, organic product protection, and so on are some of the applications.
Potassium permanganate (KMnO4) is an inorganic compound, whereas potassium dichromate (K2Cr2O7) is an inorganic compound with the chemical formula K2Cr2O7. Permanganate has a dark purple colour, whereas dichromate has a red-orange colour.
When it comes to the oxidation states of the metal atoms in these compounds, manganese has a +7 oxidation state in potassium permanganate and chromium has a +6 oxidation state in potassium dichromate.
Conclusion
Since we utilise potassium permanganate and potassium dichromate in titration techniques, they are fairly frequent in labs. Despite the fact that each of these compounds contains potassium, we can easily differentiate them just by looking at them since they have completely distinct appearances.
