For the dissociation of formic acid, acetic acid and carbonic acid the value of pKa is 3.62, 4.74 and 6.3 respectively. Which of the following statement is correct?

Question

For the dissociation of formic acid, acetic acid and carbonic acid the value of pKa is 3.62, 4.74 and 6.3 respectively. Which of the following statement is correct? (A) Formic acid is the strongest acid (B) Acetic acid is the weakest acid (C) Carbonic acid is the strongest acid (D) Acetic acid is weaker than carbonic acid

Tardigrade Admin · Accepted Answer

On decreasing the pKa value, acidic strength increases, ie, smaller the value of pKa, stronger the acid is. Hence, formic acid is the strongest acid.

Q. For the dissociation of formic acid, acetic acid and carbonic acid the value of $p K_{a}$ is 3.62, 4.74 and 6.3 respectively. Which of the following statement is correct?

Formic acid is the strongest acid

Acetic acid is the weakest acid

Carbonic acid is the strongest acid

Acetic acid is weaker than carbonic acid

On decreasing the $p K_{a}$ value, acidic strength increases, ie, smaller the value of $p K_{a},$ stronger the acid is. Hence, formic acid is the strongest acid.

Q. For the dissociation of formic acid, acetic acid and carbonic acid the value of pKa​ is 3.62, 4.74 and 6.3 respectively. Which of the following statement is correct?