Write chemical reactions to show the amphoteric nature of water

Asked by Abhisek | 1 year ago |  37

1 Answer

Solution :-

The amphoteric nature of water can be described on the basis of the following reactions:

(1) Reaction with H2S

The reaction takes place as:

\( H_{2}O_{(l)}+H_{2}S_{(aq)}\rightleftharpoons H_{3}O^{+}_{(aq)}+HS^{-}_{(aq)} \)

In the forward reaction, 

\( H_{2}O_{(l)}​ \) accepts a proton from \( H_{2}S_{(aq)}\)

 Therefore, it acts as a lewis base.


(2) Reaction with NH3

The reaction takes place as:

\( H_{2}O_{(l)}+NH_{3(aq)}\rightleftharpoons OH^{-}_{(aq)}+NH^{+}_{4(aq)}\)

In the forward reaction, \( H_{2}O_{(l)}\) denotes its proton to \( NH_{3(aq)}\)​. 

Therefore, it acts as lewis acid.


(3) Self-ionization of water

2 water molecules reacts in this reaction as,

\( H_{2}O_{(l)}+H_{2}O_{(l)}\rightleftharpoons H_{3}O^{+}_{(aq)}+OH^{-}_{(aq)}\)

Answered by Pragya Singh | 1 year ago

Related Questions

What do you understand by the terms :

(i) Hydrogen economy 

(ii) Hydrogenation 

(iii) ‘syngas’ 

(iv) Water-gas shift reaction 

(v) Fuel cell?

Class 11 Chemistry Hydrogen View Answer

Do you expect different products in solution when aluminium (III) chloride and potassium chloride treated separately with 

(i) alkaline water 

(ii) acidified water, and 

(iii) normal water. Write equations wherever necessary.

Class 11 Chemistry Hydrogen View Answer

What do you expect the nature of hydrides is, if formed by elements of atomic numbers 15, 19, 23 and 44 with dihydrogen? Compare their behaviour with water.

Class 11 Chemistry Hydrogen View Answer

How can saline hydrides remove traces of water from organic compounds?

Class 11 Chemistry Hydrogen View Answer