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Baking powder on heating decomposes to give sodium carbonate, water and carbon dioxide according to the following equation

NaHCO3 → Na2CO3 +H2O +CO2

Washing soda (Na2CO3.10H2O) on the other hand, on heating below 373 K loses 9 molecules of water of crystallization and forms Sodium carbonate monohydrate (Na2CO3.H2O). On heating above 373 K, this monohydrate changes to anhydrous white powder called soda ash - Na2CO3 but does not decompose further.

Na2CO3.10H2O → Na2CO3.H2O + 9 H2O (Below 373 K)

Na2CO3.H2O → Na2CO3 + H2O (above 373 K)

Soda ash

Therefore baking soda decomposes on heating with evolution of CO2, while washing soda loses its water of crystallization and forms soda ash but there is no evolution of CO2.

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Related questions

How do you prepare washing soda?

You can form sodium carbonate (washing soda) by heating sodium bicarbonate (baking soda), which will release carbon dioxide and water. Sodium carbonate is called washing soda because it is a water softener.


Is super washing soda the same as baking soda ash?

Yes, super washing soda is the same as baking soda, or baking soda powder. This is also called baking soda ash by some people. It can be used to clean or do laundry.


What is the chemical name and formula of washing powder and baking soda?

Baking soda is sodium bicarbonate - NaHCO3. Washing powders are very different; they are not compounds but mixtures.


How can baking soda be obtained from washing soda?

yes


Where did baking soda get its name?

Baking soda is the common name for sodium bicarbonate (NaHCO3) which is one of a group of sodium-based compounds that fall under the generic name of "sodas". The adjective "baking" comes from the fact that one of its primary uses is as a leavening agent in baked goods, and to distinguish it from other sodas including washing soda, caustic soda, etc.


What is the difference between washing soda baking soda and soda ash?

Soda ash, which can also be referred to as washing soda, is sodium carbonate. Baking soda is sodium bicarbonate.


When should you use baking soda?

You should use baking soda when you washing clothes or you can put it in drinks.


Does baking soda washing your hair affect recent coloring?

Yup


Can baking powder react to an exothermic chemical reaction?

Baking powder is thermally decomposed by heating (absorb heat).


Can you change baking soda into washing soda?

Yes you can. If baking soda is heated to high temperatures (300-400 F) it turns into washing soda. It gives off carbon dioxide and water vapor.


What are the bases that can be found at home?

baking soda, washing soda, and sink declogger


Is a new substance formed when baking soda is added to water?

washing soda