Question

explain the similarity and difference in two events name adding NaOH water and adding CaO to water​

Answer 1

Answer:

Reaction between NaOH and water: NaOH + H2O → Na+ + OH-

Reaction between CaO and water : CaO + H2O → Ca(OH)2 + heat

Explanation:

difference :In the 1St reaction NaOH is breakdown in the ion

and in 2Nd reaction calcium hydroxide is formed

Similarities : the both reaction are exothermic in nature in both of rxn heat is evolved

Answer 2

Answer:

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Explanation:

Similarity:

(i) Both NaOH and CaO dissolve in water. NaOH

dissolves in water forming aqueous NaOH

while CaO reacts with water to form Calcium

Hydroxide [Ca(OH)2

]

(ii) Both are bitter in taste, and turn red litmus to

blue. i.e. both are basic in nature.  

NaOH(s) + H2

O(l) → NaOH(aq) + Heat

CaO(s) + H2

O(l) → Ca(OH)2(aq) + Heat

Both are exothermic reactions.

(iii) After adding water, the properties of aqueous

solution of sodium hydroxide (NaOH) and

aqueous solution of calcium oxide (CaO) are

different.

Difference:  

(i) Sodium Hydroxide (NaOH) is highly soluble

in water, whereas calcium oxide (CaO) is less

soluble in water.

(ii) Aqueous solution of NaOH is monovalent,

whereas aqueous solution of Ca(OH)2

is divalent.

(iii) As NaOH is highly soluble in water, makes strong

base whereas Ca(OH)2 is a weak base.