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Potassium Chromate Formula – Structure, Properties, Uses, Sample Questions

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Potassium is a chemical element with the symbol K. Its atomic number is 19. Its electronic configuration is 1s2 2s2 2p6 3s2 3p6 4s1. It belongs to the first group and fourth period of the periodic table. The largest use of potassium is potassium chloride (KCL) it is mainly used in the making of fertilizers. Potassium is most important to plant growth It occurs in soaps, detergents, glass production, and gun powder. 

Chromium is a chemical element with the symbol Cr and its atomic number is 24 belongs to the sixth group of the periodic table chromium electronic configuration is 1s2 2s2 2p6 3s2 3p4 3d5 4s1 or [Ar] 3d5 4s1 chromium is the 21st most abundant element in earth’s crust. and its compounds are found in the environment from the erosion of chromium-containing rocks and they can be redistributed by volcanic eruptions.

Oxygen is a chemical element with the symbol O. Its atomic number is 8. It’s electronic configuration is 1s2 2s2 2p4. It is a member of the chalcogen group of the periodic table. It is a highly reactive nonmetal and it is the most prevalent element on earth. It is mainly used in steel, plastics, glass productions, and stone products and is also used in rocket propulsion.

Potassium Chromate

Potassium Chromate is an inorganic compound with the formula K2CrO4. It is also called bipotassium chromate. It is a yellow crystalline solid. Potassium Chromate contains two different ions they are potassium and chromate in a 2:1 ratio. It is an oxidizing agent. An oxidizing agent is a compound that’s able to gain or remove electrons from another compound. It is very reactive with reducing agents. The potassium chromate is prepared from Chromite ore (FeoCr2O3), Chromium oxide (Cr2O3), and potassium dichromate (K2CrO4).

Structure of Potassium Chromate

 

Physical Properties of Potassium Chromate

  • Potassium Chromate has a molecular weight or molar mass of 194.1896 g/mol.
  • its density is 2.7320g/cm3 
  • Its melting point is 968°C.
  • and its boiling point is 1000°C. 

Chemical Properties of Potassium Chromate

  • Potassium Chromate is odorless.
  • It is a lemon yellow crystalline solid.
  • It is highly soluble in water and insoluble in alcohol.
  • In water, it gives a yellow color solution. 
  • Potassium Chromate reacts with Lead Acetate it gives yellow color oil used in the preparation of yellow color oil known as the yellow crown,

K2+CrO4 + (CHCOO)2Pb+ ⇢ 2CH3COOK + PbCrO4

  • Reaction with AgNO3 it gives Brick red,

K2+CrO4 + Ag+NO3 ⇢ KNO3 + Ag2CrO4

Uses of Potassium Chromate

  • Potassium Chromate is used as an oxidizing agent.
  • It is used as a mordant in the dyeing process.
  • It is used in making pigments.
  • It is used in tuning leather.
  • It is used as an indicator.
  • It is used in qualified analysis to detect the ions.
  • It is used as a corrosion inhibitor.
  • It is used as a fungicide.
  • It is used in the leaching process.

Sample Questions

Question 1: How to handle potassium chromate?

Answer:

Potassium Chromate is like all hexavalent chromium compounds it is highly toxic and carcinogenic on inhalation. Whenever using this compound compulsory wearing gloves without gloves can cause dermatitis, and can also be absorbed through the skin in a small amount. So always wear gloves and goggles when handling it and also use a dust mask to avoid inhalation of it.

Question 2: What is the percent composition of potassium chromate?

Answer:

Potassium Chromate is an inorganic compound with the formula K2CrO4. It is composed of 40.3% of potassium, 26.8% of chromium, and 32.9% of oxygen.

Question 3: What is the main purpose of chromium?

Answer: 

Chromium is important for brain function and other body processes and it is used in the breakdown of fats and carbohydrates. It stimulates fatty acid and cholesterol synthesis. It is also used in insulin action and glucose breakdown.

Question 4: List out some high potassium drinks?

Answer:

Juice from potassium-rich fruit is a good choice,

  • Orange juice
  • Apricot juice
  • Grapefruit juice
  • Tomato juice
  • Prune juice

Question 5: What are the uses of potassium?

Answer:

Potassium is one of the seven essential macrominerals. The human body needs potassium to support key processes. It helps nerves function and muscles o contract. It helps to human heartbeat stay regular.Potassium is most important to plant growth It occurs in soaps, detergents, glass production, and gun powder

Question 6: What are the differences between potassium chromate and potassium dichromate?

Answer:

Potassium Chromate is an inorganic compound with the formula K2CrO4, whereas potassium dichromate is an inorganic compound having the chemical formula K2CrO4 . It has two chromate ions. The main difference is that Potassium Chromate appears in yellow color and potassium dichromate appears in orange color.

Question 7: What are the side effects of Potassium Chloride?

Answer:

The common side effects of potassium chloride are vomiting, abdominal pain, diarrhea, and nausea, and these side effects can reach fetal points if taken in excess.

Question 8: What is potassium dichromate?

Answer:

Potassium dichromate is an inorganic compound having the chemical formula K2CrO4. It appears in color bright red-orange.it is an oxidizing agent. It is harmful to our health. It readily dissolves in water. It is used for cleaning purposes, in construction, etc. 



Last Updated : 20 Dec, 2023
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