potassium bicarbonate
Definition
- Noun:
- A white, crystalline salt: Potassium bicarbonate is a chemical compound with the formula KHCO₃. It is a white, solid substance that appears as crystals or a fine powder.
- A leavening agent: It is used in baking powder to help dough or batter rise by producing carbon dioxide gas when combined with moisture and an acid.
- An antacid: It is used medicinally to neutralize excess stomach acid and relieve conditions like heartburn or indigestion.
Usage Examples
- Noun:
- The recipe calls for potassium bicarbonate as a leavening agent.
- Some antacid tablets contain potassium bicarbonate to neutralize acid.
- Potassium bicarbonate is a common ingredient in low-sodium baking powders.
Advanced Usage
- In Chemistry: Potassium bicarbonate is the potassium salt of carbonic acid. It decomposes upon heating to release carbon dioxide.
- When heated, potassium bicarbonate decomposes into potassium carbonate, water, and carbon dioxide gas.
- In Food Science: It is often used as a food additive (E501(ii)) for its leavening and pH-regulating properties.
- Potassium bicarbonate is listed as an acidity regulator in the ingredients.
Variants and Related Words
- Potassium carbonate (K₂CO₃): A related, more alkaline compound, often formed when potassium bicarbonate is heated.
- Sodium bicarbonate (NaHCO₃): A closely related compound (baking soda) with similar leavening and antacid uses, but containing sodium instead of potassium.
- Bicarbonate: A general term for salts containing the HCO₃⁻ anion.
Synonyms
- Potassium hydrogen carbonate: The systematic chemical name for potassium bicarbonate.
- KHCO₃: The chemical formula used as a synonym in scientific contexts.
Related Phrases and Compounds
- Baking powder: A mixture that often contains potassium bicarbonate, an acid, and a starch.
- Effervescent antacid: A type of antacid medication that may use potassium bicarbonate to create a fizzing reaction in water.
Noun
-
a crystalline salt (KHCO3) that is used in baking powder and as an antacid
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