Advertisements
Advertisements
Question
Explain the action of baking powder in the making of cake (or bread). Write equation of the reaction involved.
Solution
On mixing baking powder with water, which is present in the dough prepared for baking a cake or bread, sodium hydrogencarbonate reacts with tartaric acid to evolve carbon dioxide gas. The carbon dioxide gas gets trapped in the wet dough and bubbles out slowly, and the cake becomes soft and spongy.
`NaHCO_3 (aq) + H^+ (aq) -> Na^+ (aq) + CO_2 (g) + H_2O (l)`
Note: Here, H+ is from tartaric acid and Na+ is from sodium tartrate salt.
APPEARS IN
RELATED QUESTIONS
Write two applications of sodium bicarbonate (baking soda).
A student takes about 2 mL ethanoic acid in a dry test tube and adds a pinch of sodium hydrogen carbonate to it. He reports the following observations:
I. Immediately a colourless and odourless gas evolves with a brisk effervescence.
II. The gas turns lime water milky when passed through it.
III. The gas burns with an explosion when a burning splinter is brought near it.
IV. The gas extinguishes the burning splinter that is brought near it.
The correct observations are
(A) I, II and III
(B) II, III and IV
(C) III, IV and I
(D) I, II and IV
Give two important uses of baking soda.
Complete and balance the following chemical equations:
`NaHCO_3` 
What is baking soda?
In addition to sodium hydrogencarbonate, baking powders contain a substance X. Name the substance X. What is the role of substance X in the baking powder?
Salt 'P', commonly used in bakery products, on heating gets converted into another salt 'Q' which itself is used for the removal of hardness of water and a gas 'R' is evolved. The gas 'R', when passed through freshly prepared lime water, turns milky. Identify 'P', 'Q' and 'R', giving a chemical equation for the justification of your answer.
Which one of the following salts does not contain water of crystallisation?
For making cake, baking powder is taken. If at home your mother uses baking soda instead of baking powder in cake,
- how will it affect the taste of the cake and why?
- how can baking soda be converted into baking powder?
- what is the role of tartaric acid added to baking soda?
Mild non-corrosive basic salt is ______.
