What is Ammonium Bicarbonate Definition Formula Structure Reactions and Applications
Ammonium bicarbonate is an inorganic compound that is mildly basic. It consists of the ammonium cation and the bicarbonate anion. The molecular or chemical formula of Ammonium bicarbonate is NH4HCO3. It appears as a crystalline solid white and has a strong smell of ammonia. It readily dissolves in water but insoluble in most various organic solvents. When Ammonium bicarbonate is dissolved in water, it gives you a mildly alkaline solution.
Ammonium Bicarbonate Structure
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Properties of Ammonium Bicarbonate
Salt of Hartshorn
The compositions contain ((NH4)2CO3) which is the chemical name of ammonium carbonate. They were produced commercially and formerly referred to as spirits of ammonia or salt of hartshorn. It is obtained by the dry distillation of nitrogenous organic matter like hair, horn, leather. In addition to ammonium bicarbonate, this material contains carbamate (NH4CO2NH2), and carbonate ((NH4)2CO3). Ammonium Carbonate may be a non-toxic white crystalline salt with the formula (NH4)2CO3. It is also known as hartshorn or baker’s ammonia.
Since it readily degrades to gaseous ammonia and carbon dioxide upon heating, it is used as a leavening agent and also as a smelling salt. It was a predecessor to the more modern leavening agents baking soda and baking powder. It is also used in some smokeless tobacco products and as an active ingredient in cough syrup to relieve the symptoms of bronchitis. Its use as a leavening agent goes back centuries. It is the predecessor to the more modern leavening agents baking soda and baking powder. A similar decomposition takes place when the carbonate is exposed to air.
Ammonium Bicarbonate Production
Ammonium bicarbonate is produced by combining CO2 and ammonia:
CO2 + NH3 + H2O → (NH4) HCO3
The reaction solution is kept cold because ammonium bicarbonate is thermally unstable. It allows the precipitation of the merchandise as white solid. About 100,000 tons were produced during this way in 1997.
The compound on exposure to air gives off ammonia and returns to ammonium bicarbonate form. Ammonia gas converts (NH4)2CO3, and H2O) into normal carbonate ((NH4)2CO3) when it passes into a robust solution of the carbonate (a 2:1:1 mixture of (NH4)HCO3. It may obtain in the crystalline condition from an answer prepared at about 30 °C.
Ammonium Bicarbonate Uses
Ammonium bicarbonate is employed within the food industry as a leavening agent for flat food, like cookies and crackers. It was commonly utilized in the house before modern-day leaven was made available. In many cases, it replaces bicarbonate of soda or a mixture of both, counting on the recipe composition and leavening requirements. Compared to baking soda, hartshorn has the advantage of producing more gas for the same amount of agent, and of not leaving any salty or soapy taste in the finished product, because it completely decomposes into water and gaseous products that evaporate during baking. It cannot be used for moist, bulky food, like regular bread or cakes since some ammonia is going to be trapped inside and can cause an unpleasant taste.
Ammonium bicarbonate is used as an inexpensive nitrogen fertilizer in China but is now being phased out in favour of urea for quality and stability. This compound is employed as a component of fire-extinguishing compounds, pharmaceuticals, dyes, pigments, and it is also an essential fertilizer, being a source of ammonia within the production. It widely remains utilized in the plastics and rubber industry, in the manufacture of ceramics, in chrome leather tanning, and for the synthesis of catalysts.
It is also used for buffering solutions to form them slightly alkaline during chemical purification, like high-performance liquid chromatography. Because it entirely decomposes to volatile compounds, this enables rapid recovery of the mixture of interest by freeze-drying. Ammonium bicarbonate is additionally a vital component of the expectorant cough syrup.
Health Effects/Safety Hazards of Ammonium Bicarbonate
In low concentrations, it is not considered hazardous. Its primary health hazard is its decomposition reaction giving sour ammonia gas, which is a severe irritant. Inhalation of ammonium bicarbonate can irritate the eyes, skin, nose, and full system respiratory, and cause severe coughing and difficulty in breathing.
FAQs on Ammonium Bicarbonate Properties Formula Preparation and Uses
1. What is ammonium bicarbonate?
Ammonium bicarbonate is an inorganic salt with the chemical formula NH4HCO3 composed of ammonium and bicarbonate ions. It consists of the NH4+ (ammonium) cation and the HCO3− (bicarbonate) anion. It is a white crystalline solid commonly used in baking, fertilizers, and laboratory chemistry. Ammonium bicarbonate is also known as baker’s ammonia because it releases gases on heating.
2. What is the chemical formula and molar mass of ammonium bicarbonate?
The chemical formula of ammonium bicarbonate is NH4HCO3 and its molar mass is approximately 79.06 g/mol. The molar mass is calculated as follows:
- N: 14.01 g/mol
- H (5 atoms): 5 × 1.008 = 5.04 g/mol
- C: 12.01 g/mol
- O (3 atoms): 3 × 16.00 = 48.00 g/mol
3. Is ammonium bicarbonate an acid, base, or salt?
Ammonium bicarbonate is a salt that exhibits slightly basic behavior in aqueous solution. It is formed from the reaction of a weak base (NH3) and a weak acid (H2CO3). In water, it partially dissociates:
- NH4HCO3(s) → NH4+(aq) + HCO3−(aq)
4. What happens when ammonium bicarbonate is heated?
When heated, ammonium bicarbonate decomposes into ammonia, carbon dioxide, and water vapor. The balanced thermal decomposition reaction is:
- NH4HCO3(s) → NH3(g) + CO2(g) + H2O(g)
5. How is ammonium bicarbonate prepared in the laboratory or industry?
Ammonium bicarbonate is prepared by passing carbon dioxide through aqueous ammonia. The balanced reaction is:
- NH3(aq) + CO2(g) + H2O(l) → NH4HCO3(aq)
6. What are the uses of ammonium bicarbonate?
Ammonium bicarbonate is used as a leavening agent, fertilizer component, and laboratory reagent. Its main uses include:
- Baking (baker’s ammonia) for cookies and crackers
- Component in nitrogen fertilizers
- Source of ammonia gas in chemical reactions
- Buffer and reagent in analytical chemistry
7. Is ammonium bicarbonate soluble in water?
Yes, ammonium bicarbonate is soluble in water and dissociates into ammonium and bicarbonate ions. The dissolution process is:
- NH4HCO3(s) → NH4+(aq) + HCO3−(aq)
8. What is the difference between ammonium bicarbonate and sodium bicarbonate?
The key difference is that ammonium bicarbonate (NH4HCO3) releases ammonia on heating, while sodium bicarbonate (NaHCO3) does not. On heating:
- NH4HCO3(s) → NH3(g) + CO2(g) + H2O(g)
- 2NaHCO3(s) → Na2CO3(s) + CO2(g) + H2O(g)
9. What type of reaction is the decomposition of ammonium bicarbonate?
The decomposition of ammonium bicarbonate is a thermal decomposition reaction. In this reaction, a single compound breaks down into simpler substances upon heating:
- NH4HCO3(s) → NH3(g) + CO2(g) + H2O(g)
10. Why does ammonium bicarbonate smell like ammonia?
Ammonium bicarbonate smells like ammonia because it slowly decomposes to release NH3(g). Even at room temperature, slight decomposition occurs:
- NH4HCO3(s) → NH3(g) + CO2(g) + H2O(g)
