With the help of a dissociation reaction, explain the acidic behaviour of HCl
in aqueous solution
Answers
Answer:
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Explanation:
Dissociation of molecular acids in water
In this instance, water acts as a base. The equation for the dissociation of acetic acid, for example, is CH3CO2H + H2O ⇄ CH3CO2− + H3O+.
Dissociation of bases in water
In this case, the water molecule acts as an acid and adds a proton to the base. An example, using ammonia as the base, is H2O + NH3 ⇄ OH− + NH4+. Older formulations would have written the left-hand side of the equation as ammonium hydroxide, NH4OH, but it is not now believed that this species exists, except as a weak, hydrogen-bonded complex.
Dissociation of acids and bases in nonaqueous solvents
These situations are entirely analogous to the comparable reactions in water. For example, the dissociation of acetic acid in methanol may be written as CH3CO2H + CH3OH ⇄ CH3CO2− + CH3OH and the dissociation of ammonia in the same solvent as CH3OH + NH3 ⇄ CH3O− + NH4+.