Fungsi Sodium Bicarbonate

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Fungsi sodium bicarbonate

Specification

Sodium bicarbonate is extracted using solution mining by pumping hot water through injection wells to dissolve the nahcolite from the Eocene beds where it occurs 1,500 to 2,000 feet below the surface. The dissolved it is pumped to the surface where it is treated to recover NaHCO₃ from solution. it can also be produced from the trona deposits, which is a source of sodium carbonates (see Sodium Carbonate).

Application

Sodium bicarbonate, used in the formof baking soda and baking powder, is the most common leavening agent. When baking soda,which is an alkaline substance, is added to a mix, it reacts with an acid ingredient to producecarbon dioxide. The reaction can be represented as: NaHCO3(s) + H+ → Na+(aq) + H2O(l) +CO2(g), where H+ is supplied by the acid. Baking powders contain baking soda as a primaryingredient along with acid and other ingredients. Depending on the formulation, bakingpowders can produce carbon dioxide quickly as a single action powder or in stages, as with adouble-action powder. Baking soda is also used as a source of carbon dioxide for carbonatedbeverages and as a buffer.In addition to baking, baking soda has numerous household uses. It is used as a generalcleanser, a deodorizer, an antacid, a fire suppressant, and in personal products such as toothpaste.it is a weak base in aqueous solution, with a pH of about 8. Thebicarbonate ion (HCO3-) has amphoteric properties, which means it can act as either an acidor a base. This gives baking soda a buff ering capacity and the ability to neutralize both acidsand bases. Food odors resulting from acidic or basic compounds can be neutralized with bakingsoda into odor-free salts. Because it is a weak base, it has a greater abilityto neutralize acid odors.

Production Methods

Most sodium bicarbonate in the United States is made synthetically by the reaction of sodium carbonate solution (Na2CO3) with carbon dioxide: Na₂CO_3(aq) + H₂O_(l) + CO_2(g) → 2NaHCO_3(aq). It can also be produced using the Solvay process, which uses ammonia, carbon dioxide, and salt to produce it according to the following series of reactions: 2NH_3(g) + CO_2(g) + H₂O_(l) → (NH₄)₂CO_3(aq)

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