Which of the following is/are uses of sodium carbonate (washing soda)?

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Water softener

Manufacture of detergents

Wetting agent

All of the above

answer is D.

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Detailed Solution

Concept: Sodium carbonate is a strong base and its molecular formula is

N a 2 C O 3

. It is seen as a white powder and it is generally odourless.
Some of the important uses of sodium carbonate are:
Water softener- Hard water which is made up of magnesium and calcium ions are precipitated by carbonate.
It is used in the production of detergents, soaps, and paper.
Also used in the synthesis of water glass (sodium silicate), borax, sodium phosphate, and many other compounds of sodium.
It is also used as a wetting agent in the brick industry, and as an abrasive and foaming agent in toothpaste and as a pH modifier.
Hence, the correct answer is option 4.

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