Question

Which of the following statements about acids and bases are true?Acetic acid is a strong acid.A strong acid has a weak conjugate base.A Brønsted base is a proton acceptor.Bases need not contain –OH directly; instead, they can increase the concentration of –OH by deprotonating water.

Answer 1

Answer:

A strong acid has a weak conjugate base;

A Brønsted base is a proton acceptor;

Bases need not contain –OH directly; instead, they can increase the concentration of –OH by deprotonating water.

Explanation:

Acetic acid (CH3COOH) is an oxyacid, and it's deprotonating occurs in equilibrium. The equilibrium constant for this acid is Ka = $1.8x10^{-5}$, pKa will be

pKa = -logKa = 4.74

So, for higher values of pKa, less strong is the acid.

For the theory of conjugation seesaw, it must have been an equilibrium if the acid and it's the conjugate base. A strong acid has a weak conjugate base, and a weak acid has a strong conjugate base.

For the theory of Brønsted-Lowry, an acid is a proton donator, and a base is a proton acceptor, but they don't need to have $H^{+}$ and $OH^{-}$ directly, they can increase their concentration by deprotonating water.