Potassium Dichromate Formula – Equation and Problem Solved with Example

This is a popular inorganic and bright color toxic chemical with a plenty of industrial benefits too. The chemical formula for the compound could be written as K2Cr2O7 and its molecular weight is measured 294.185 g/mol approximately. The chemical structure for the compound is given as below.

Potassium Dichromate Formula

As per the structure, it looks little complex and difficult to understand at the first glance. This is an ionic compound where two potassium ions are connected dichromate (Cr2O7-) ion that is charged negatively. Look at the structure carefully to understand the arrange of atom around chromium atom.

The natural occurrence of the compound can be felt in minerals and it is prepared by mixing potassium chloride KCl with sodium dichromate (Na2Cr2O7) to give potassium dichromate (Na2Cr2O7) and sodium chloride ahead.

Na2Cr2O7 + 2 KCl → K2Cr2O7 + 2 NaCl

This is an orange crystalline solid with a density of 2.676 g/mL, melting point of 398 °C and boiling point of 500 °C. the product is odor less and dissolves quickly in water. It readily decomposes into water and converted into chromate or dichromate ions in equilibrium. This is a mild oxidizing agent and used widely in the organic chemistry. It could reversibly react with bases to release yellow chromate salts.

The product can be used as the cleaning agent and taken suitable for household cleaning like glassware, etching materials and more. It is also utilized for cement, photographic processing, leather tanning, wood staining etc. Being an oxidizing agent, it is suitable for the preparation of multiple products like waxes, glues, paints and more.


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