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प्रश्न
Write the chemical name of baking soda. Give the important uses of baking soda. How does baking soda differ chemically from washing soda?
उत्तर
- Baking soda is used in fire extinguishers.
- It is an ingredient, used in preparing baking powder, which is used in baking cakes, breads, etc.
- It is used as an antacid to remove acidity in the stomach.
Washing soda, or sodium carbonate (Na2CO3.10H2O), consists of two sodium atoms attached to a carbonate group with 10 molecules of water of crystallisation, whereas baking soda comprises one atom of sodium and one of hydrogen, attached to a carbonate group. Hence, baking soda (NaHCO3) differs from washing soda (Na2CO3) by one hydrogen atom. When baking soda is heated up at high temperatures, it breaks down to form sodium carbonate, water vapour and carbon dioxide.
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संबंधित प्रश्न
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.
The discomfort caused by indigestion due to overeating can be cured by taking:
Which compound is used as an antacid in medicine : NaHCO3 or Na2CO3?
Explain the action of baking powder in the making of cake (or bread). Write equation of the reaction involved.
What are the materials used for the preparation of bleaching powder?
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?
The formula of baking soda is:
(a) K2CO3
(b) KHCO3
(c) NaHCO3
(d) Na2CO3
Which one of the following salts does not contain water of crystallisation?
