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Question: What is the net ionic equation for the reaction between aqueous calcium hydroxide and nitric acid ? ...

What is the net ionic equation for the reaction between aqueous calcium hydroxide and nitric acid ? The products of the reaction are aqueous calcium nitrate and water. How does this net ionic equation compare to the net ionic equation shown on trans?

Explanation

Solution

We can see that calcium hydroxide is a strong base and nitric acid is a strong acid, both are reacting in aqueous conditions to give calcium nitrate and water. We are getting salt which is calcium nitrate and water. This is an example of a neutralization reaction. It is the same type of reaction which occurs when hydrochloric acid will react with sodium hydroxide and will produce a product in the form of sodium chloride and water molecules.

Complete answer:
First of all, we need to understand what a neutralization reaction is and what basically happens in a neutralization reaction.
Neutralization Reaction: it is a reaction which occurs when acid reacts with base to give salt and water. The anionic species from the acid and the cationic species from the base react and form salt, and the hydrogen ions and the hydroxide ions combine to form water molecules.
Basically, in neutralization reaction, this happens:
Acid+Base→Salt+WaterAcid + Base \to Salt + Water
Here, in question we have base aqueous calcium hydroxide and nitric acid. In which aqueous calcium hydroxide is neutralized by nitric acid.
Ca(OH)2(aq)+2HNO3(aq)→Ca(NO3)2(aq)+H2O(l)Ca{(OH)_2}(aq) + 2HN{O_3}(aq) \to Ca{(N{O_3})_2}(aq) + {H_2}O(l)
The Ionic equation of this reaction is that we express the reaction in ions. We have Ca2+, OH−, H+and NO3−C{a^{2 + }},{\text{ }}O{H^ - },{\text{ }}{H^ + }and{\text{ }}N{O^{3 - }} ions. But the net reaction of this reaction is:
OH−(aq)+H+(aq)→H2O(l)O{H^ - }(aq) + {H^ + }(aq) \to {H_2}O(l)
The ionic reaction that forms the salt is:
Ca2+(aq)+2NO3(aq)→Ca(NO3)2(aq)C{a^{2 + }}(aq) + 2N{O_3}(aq) \to Ca{(N{O_3})_2}(aq)

Note:
Whenever any neutralization reaction takes place, always keep in mind that a salt and a water molecule will be formed for sure. Now depending on the cationic part of the base and anionic part of an acid, the formation of salt will be depending on. The neutralization reactions are generally exothermic in nature and thus their heat of reaction is negative.