Respuesta :

Answer:

3, H⁺ acceptor

Explanation:

Let's consider Bronsted-Lowry acid-base theory.

According to this theory, an acid is a substance that donates H⁺ ions. For example, HCl is an acid.

HCl + H₂O = Cl⁻ + H₃O⁺

Cl⁻ is the conjugate base of HCl.

According to this theory, a base is a substance that accepts H⁺ ions. For example, NH₃ is a base.

NH₃ + H₂O = NH₄⁺ + OH⁻

NH₄⁺ is the conjugate acid of NH₃.

According to one acid-base theory, a base is an H+ acceptor.

What is the acid-base theory?

The acid-base theory, also called the Brønsted-Lowry theory, is a theory developed by Johannes N. Brønsted and Thomas M. Lowry.

  • The acid-base theory states that an acid is a proton (H+) donor, whereas a base can be considered as an H+ acceptor.

  • According to Brønsted-Lowry's theory, H2O may act as a base because this molecule acts as a proton (H+) acceptor.

In conclusion, according to one acid-base theory, a base is an H+ acceptor.

Learn more about the acid-base theory here:

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