Question

Which of the following represents the correct order of the acidity for equimolar aqueous solution for \[HCl\],\[{H_2}S{O_4}\], \[N{H_4}OH\] and \[NaOH\] ?
A) \[HCl\]<\[N{H_4}OH\]<\[NaOH\]<\[{H_2}S{O_4}\]
B) \[N{H_4}OH\]<\[NaOH\]<\[{H_2}S{O_4}\]<\[HCl\]
C) \[HCl\]<\[{H_2}S{O_4}\]<\[N{H_4}OH\]<\[NaOH\]
D) \[NaOH\]<\[N{H_4}OH\]<\[HCl\]<\[{H_2}S{O_4}\]

Answer 1

Hint: As we know that the general qualities of acids might be controlled by estimating their balance constants in watery arrangements. In arrangements of a similar focus, more grounded acids ionize indeed, thus yield higher centralizations of hydronium particles than do more fragile acids. The acid ionization constant is the equilibrium constant of an acid.

Complete step by step answer:
We know that sodium hydroxide and hydrochloric acid and sulfuric acid as strong base and strong acid respectively and ammonium hydroxide as weak base. Thus,
The increasing order of acidity is as follows,
\[NaOH\]<\[N{H_4}OH\]<\[HCl\]<\[{H_2}S{O_4}\]
Hence option D is correct.

Additional information:
We must remember that a combination of acidic acid and sodium acetic acid derivation is acidic on the grounds that the Ka of acetic acid is more noteworthy than the Kb of its form base acetic acid derivation. It is a cushion since it contains both the feeble acid and its salt. Henceforth, it acts to keep the hydronium particle focus (and the pH) practically consistent by the expansion of either a limited quantity of a solid acid or a solid base. On the off chance that we add a base, for example, sodium hydroxide, the hydroxide particles respond with the couple of hydronium particles present . A combination of smelling salts and ammonium chloride is fundamental in light of the fact that the Kb for alkali is more prominent than the Ka for the ammonium particle. It is a support since it additionally contains the salt of the powerless base.

Note:
We must remember that a combination of a weak acid and its form base and the solution of acetic acid and sodium acetic acid derivation \[\left( {C{H_3}COOH + C{H_3}COONa} \right)\] is an illustration of a cradle that comprises of a powerless acid and its salt. An illustration of a cushion that comprises of a weak base and its salt is an answer of alkali and ammonium chloride\[N{H_3}\left( {aq} \right) + N{H_4}Cl\left( {aq} \right)\].