1. What happens chemically when quicklime is added to water? Write chemical equation of the reaction involved.
  2. What is Baking Powder? How does it make the cake soft and spongy?

(a) On adding Quick lime (CaO) to water, a large amount of heat is released, with the formation of Ca(OH)2.
The chemical equation of the reaction involved is given below:
$CaO + H_2O → Ca(OH)_2​$

(b) Baking powder is a dry chemical leavening agent, a mixture of Sodium bicarbonate (baking soda) and a weak acid, Tartaric acid.
 When mixed with water the sodium hydrogen carbonate(baking soda) reacts with tartaric acid, as a result, carbon dioxide gas is liberated. This carbon dioxide is trapped in wet dough and bubbles out slowly making the cake soft and spongy.


Simply Easy Learning

Updated on: 10-Oct-2022


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