Question

(a) Give the constituents of baking powder Why cake or bread swells on adding baking powder? Write chemical equation. (b) Give reason for the following statements? (i) An aqueous solution of an acid conducts electricity. (i) Plaster of paris should be stored i proof container​

Answer 1

Answers:

i) The baking powder consists of sodium bicarbonate (NaHCO3) and small amount of mild tartaric acid [COOH-CH(OH)-CH(OH)-COOH].

ii) Baking powder is made up of baking soda, and a dry acid (usually cream of tartar, sometimes sodium aluminum sulfate). When the liquid is added to the recipe, it interacts with the two, causing the them to react and form bubbles of carbon dioxide gas.

iii) Chemical equation = NaCl+H2O+CO2+NH3= NH4Cl+NaHCO3

Answer 2

Explanation:

Baking powder. It consists of sodium hydrogen carbonate and tartaric acid. Sodium hydrogen carbonate on heating gives C02 which makes cake soft and fluffy. ... Sodium hydrogen carbonate is a salt of sodium hydroxide (strong base) and carbonic acid (weak acid).