Baking soda

gashwin

Village Chief
#11
One alkaline one acidic
Is NAHCO3 an acidic salt or a basic salt? It can be an acidic salt because all its hydrogen ions are not replaced.At the same time,it can be a basic salt beacuse it will further react with an acid to produce a normal salt and it is possible only for a base (or basic salt) to react with an acid.

Asked by kaa179918th April 2014, 11:57 PM

Answered by Expert

Answer:
Sodium bicarbonate is a weak base with pH slightly above 7.

However, Sodium bicarbonate can act as either an acid or a base. Dissolved in water, the pH will be slightly higher than 7, which is basic.

An acid is proton donor. A base is a proton acceptor.

Combined with acetic acid (vinegar), sodium bicarbonate is a base, accepting a proton from the acetic acid (then decomposing to water and carbon dioxide).

CH3COOH + NaHCO3 → CH3COONa + H2CO3
H2CO3 → H2O + CO2

However, combined with strong base such as sodium hydroxide, sodium bicarbonate can donate a proton. Hydroxide becomes water, and bicarbonate becomes carbonate.

NaHCO3+ NaOH → H2O + Na2CO3
 

Muthamaki

Village Elder
#17
Baking soda has only one ingredient: sodium bicarbonate. Sodium bicarbonate is a base that reacts when it comes into contact with acids, like buttermilk, yogurt or vinegar. This reaction produces carbon dioxide (CO2) in the form of bubbles,

All baking powders contain sodium bicarbonate (just like baking soda). But baking powder also contains two acids. One of these acids is called monocalcium phosphate. Monocalcium phosphate doesn't react with the sodium bicarbonate while it's dry. But as soon as the baking powder is stirred into a wet dough or batter, the two ingredients begin to react, releasing bubbles of CO2 and causing chemical leavening.

But to extend the chemical leavening process, baking powder also contains a second acid, either sodium acid pyrophosphate or sodium aluminum sulfate. Neither of these acids react with sodium bicarbonate until they are both wet and hot.
 

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