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Potassium bicarbonate is a chemical compound with the formula KHCO 3 .

Potassium bicarbonate is a chemical compound with the formula KHCO 3 . It is made up of a potassium cation (K + ) and a bicarbonate anion (HCO 3 – ).

The IUPAC name of this compound is potassium hydrogen carbonate. Under standard conditions, potassium bicarbonate exists as a white solid.

KHCO 3 is a monopotassium salt of H 2 CO 3 ( carbonic acid ). Similar to sodium bicarbonate (baking soda), potassium bicarbonate is alkaline in nature. It is widely used as an antacid since it has the ability to neutralize gastric acid.

Potassium bicarbonate molecules feature an ionic bond between K + and HCO 3 – ions . The structure of a KHCO 3 molecule is illustrated below.

The bicarbonate ion is formed when carbonic acid undergoes deprotonation. This polyatomic ion consists of a central carbon atom which is chemically bonded to three oxygen atoms. One of these oxygen atoms is bonded to a hydrogen atom. The negative charge of magnitude -1 is delocalized through the remaining oxygen atoms due to resonance.

When an aqueous solution of K 2 CO 3 (potassium carbonate) is treated with carbon dioxide gas, KHCO 3 is formed. The chemical equation for this reaction is given by:

The standard enthalpy of formation for this compound corresponds to -963.2 kilojoules per mole. When heated to 120 o C, potassium bicarbonate begins to undergo a decomposition reaction to yield water, carbon dioxide, and potassium carbonate.

Potassium bicarbonate is widely used in organic farming in order to control powdery mildew. Some other applications of this compound are listed below.

Potassium is a mineral that is contained naturally in food, and is important for many of the body’s normal functions, particularly beating of the heart. Potassium bicarbonate is used to prevent or treat a deficit of potassium (hypokalaemia).

No, baking soda is made up of sodium bicarbonate. However, potassium bicarbonate can be used as an alternative to baking soda because it has the same leavening capabilities but it does not contain any sodium.

Potassium bicarbonate can be used as an antacid, electrolyte replenisher and as a supplement for potassium. It can also be used in medication formulations as an excipient. The antacid potential of potassium bicarbonate is achieved by neutralizing hydrochloric acid by increasing the gastrointestinal pH.

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292 o C (Starts to Decompose at 100 o C)