Question

Explain the similarity and difference in two events, namely adding NaOH to water and adding CaO to water. Write answers to the question

Answer 1

The similarity and difference in between Sodium Hydroxide added to water and Calcium oxide added to water are ⇒ 


Reactions :-

1) When Sodium Hydroxide (or NaOH) is added to Water ⇒
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NaOH + H₂O ----→ Na⁺ + OH⁻ + H₂O + Heat 
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This reaction is an example of the Exothermic reaction because heat is produce in it.

2) When Calcium oxide (CaO) added to water ⇒

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 CaO + H₂O ------→ Ca(OH)₂ + Heat 
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This reaction is also an exothermic reaction because lots of heat produce in it . 

Explanation -:
A) SIMILARITY B/W THESE TWO REACTION 
i) Both reactions are Highly Exothermic , As Heat released in both of them. 
ii) Both reaction formed Strong Alkali solution.


B) DIFFERENCE B/W THESE TWO REACTIONS

i) Sodium Hydroxide Dissociates to form Na⁺ and OH⁻ ion . While Calcium oxide added water to form Calcium Hydroxide which further dissociates. 
ii)  NaOH is a monoacidic base. and CaO is a Di-Acidic base.


Hope it helps.