Question

Select the $p{K_a}$ value of strongest acid from the following:
A 1.0
B.3.0
C.2.0
D.4.5

Answer 1

Hint: the strong acids get ionized into the solutions completely which means a strong acid gives us the greatest Number of hydrogen ions in a solution.

Complete step by step solution:

Dissociation constant is a kind of very specific constant in equilibrium that looks after the number of larger objects to get separated into some smaller components while the complex falls into smaller molecular components or splits up into the smaller components. Further dissociation constant is inversely proportional to the association constant first stop during some special cases dissociation constant are also termed as ionization constant.
For a reaction:
${A_X} + {b_y} \to {}_xA + {y^B}$
Where, breaks into and so the dissociation constant is:
$_{_{{K_d} = \dfrac{{{{\left( A \right)}^x}{{\left( B \right)}^y}}}{{{A_x}{B_y}}}\,}}$
Where, [A], [B]and [${A_x}{B_y}$] are the equilibrium constant of the complex is like A, B and${A_x}{B_y}$. Further $p{K_a}$ is said to be the dissociation constant which tells us about the acid strength. Higher will be the value of $p{K_a}$ weaker the acid will be. So, if $p{K_a}$ value comes to be 1 then the acid will become the strongest amongst all.
So as the dissociation constant of an acid is the quantity believed measured strength of the acid in a particular solution full stop mostly the dissociation constant can be written as the concentration of equilibrium quotient (in mol/L).

The correct answer is A.

Note: $p{K_a}$can sometimes also be expressed as${K_a}$. More will be the value of $p{K_a}$ smaller gets the extent of dissociation of the solution. Whereas a weak acid comprises $p{K_a}$value which can range from -2 to 12 in the water. Acids whose $p{K_a}$ value is less than -2 are considered as strong acids.