What is the molar mass of Potassium chromate?

Potassium chromate, with the chemical formula K2Cr2O7, is an important inorganic compound. It is an orange crystalline solid that can dissolve in water and is used as an oxidizing agent and catalyst. In the chemistry laboratory, it is widely used in analysis and synthetic chemical reactions. So, what is the molar mass of Potassium chromate? This question involves some basic concepts and methods in chemical calculations, which will be explained in detail below.

1. Definition of molar mass

In chemistry, molar mass refers to the molecular weight or atomic weight of a substance, measured in grams per mole (g/mol). Molar mass is an important concept in chemical calculations as it can be used to calculate the mass ratio of reactants and products, as well as the moles of reaction and the equilibrium constant of a chemical reaction.

2. Molar mass of Potassium chromate

The molecular formula of Potassium chromate is K2Cr2O7, which contains 2 potassium atoms, 2 chromium atoms, and 7 oxygen atoms. According to the atomic weights in the periodic table, the atomic weight of potassium is 39.1, chromium is 52.0, and oxygen is 16.0. Therefore, the molar mass of Potassium chromate can be calculated as follows:

Molar mass = 2 × atomic weight of potassium + 2 × atomic weight of chromium + 7 × atomic weight of oxygen

= 2 × 39.1 + 2 × 52.0 + 7 × 16.0

= 294.2 g/mol

Therefore, the molar mass of Potassium chromate is 294.2 g/mol.

3. Applications of Potassium chromate

Potassium chromate has many important applications. It can be used as an oxidizing agent to convert certain organic compounds into corresponding ketones or aldehydes. It can also be used as a catalyst to facilitate certain chemical reactions. Additionally, Potassium chromate can be used in analytical chemistry, such as a standard substance for analyzing the content of substances like barium sulfate.

4. Safety of Potassium chromate

Potassium chromate is moderately hazardous as it is a strong oxidizing agent. It can cause irritation to the skin and eyes and may have respiratory effects. Therefore, when using Potassium chromate, it is important to practice safety measures such as avoiding skin and eye contact and ensuring good ventilation.

What is the molar mass of Potassium chromate? The molar mass of Potassium chromate is 294.2 g/mol. This concept is an important one in chemical calculations and can be used to calculate the mass ratio of reactants and products, as well as the moles of reaction and the equilibrium constant of a chemical reaction. Potassium chromate has many important applications but also carries certain hazards that require careful handling.