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Question
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?
Solution
In addition to sodium hydrogencarbonate, baking powder contains tartaric acid (X). Tartaric acid is added to baking powder to neutralise the bitter taste that baking soda produces in the cake. Also, carbon dioxide, which makes the cake fluffy and soft, is produced only when the tartaric acid reacts with the sodium hydrogencarbonate or baking soda, in the presence of water.
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RELATED QUESTIONS
When you add sodium hydrogen carbonate to acetic acid in a test tube, a gas liberates immediately with brisk effervescence. Name this gas. Describe the method of testing this gas.
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.
What is baking soda?
Write the chemical name of baking soda. Give the important uses of baking soda. How does baking soda differ chemically from washing soda?
Describe how sodium hydrogencarbonate (baking soda) is produced on a large scale. Write equation of the reaction involved.
What is the common name of sodium hydrogencarbonate?
(i) Name the products formed when sodium hydrogen carbonate is heated.
(ii) Write the chemical equation for the reaction involved in the above.
Write the chemical formula.
Baking soda
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?
