Question

define bronsted lowry acid and base? write conjugate acid and conjugate base of h2o?

Answer 1

Dear student,
In Bronsted-Lowry theory, an acid is a substance that can release a proton (like in the Arrhenius theory) and a base is a substance that can accept a proton. A basic salt, such as Na⁺F^-, generates OH^- ions in water by taking protons from water itself (to make HF):
F^-(aq) + H₂O(l) > HF(aq) + OH^-(aq)
When a Brønsted acid dissociates, it increases the concentration of hydrogen ions in the solution, [H+][H+]; conversely, Brønsted bases dissociate by taking a proton from the solvent (water) to generate [OH−].
Acid dissociation : HA ⇌ H⁺ + A^-
​​​​​Upon analysing:

• A Brønsted-Lowry acid is a proton (hydrogen ion) donor.
• A Brønsted-Lowry base is a proton (hydrogen ion) acceptor.

To find out the conjugate acid add one H+ to the given molecule and for conjugate base remove one H+ from given molecule.

SPECIES	CONJUGATE ACID	CONJUGATE BASE
H2O	H3O+	OH-

Regards