Definitions of Acids and Bases

What is an Arrhenius acid?

• A substance that produces H+ in water.

• A substance that produces OH- in water.

Answer explanation

An Arrhenius acid has a H in the beginning of its formula and produces H+ in water.

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What is an Arrhenius base?

• A substance that produces H+ ion in water

• A substance that produces OH- ion in water.

• A substance that produces OH+ ion in water

• A substance that produces H- ion in water.

Answer explanation

An Arrhenius base has a OH at the end of its formula and produces OH- in water.

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Label the acid, base, conjugate acid and conjugate base.

a

b

c

d

acid

conjugate base

base

conjugate acid

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Click on the acid.

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Click on the base.

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Click on the conjugate base.

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Click on the conjugate acid.

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Which of the following is a Bronsted-Lowry Conjugate acid-base pair.

• HCl and NaOH

• H₃O⁺ and OH^-

• H₂SO₄ and HSO₄^-

• H₂S and S^2-

Answer explanation

There is only one hydrogen difference between an acid and its conjugate base or a base and its conjugate acid.

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According to Bronsted-Lowry, what does an acid do?

• It donates a proton (H⁺).

• It accepts a proton (H⁺)

• It produces H⁺ in water.

• It produces OH^- in water.

Answer explanation

A Bronsted-Lowry acid donates a proton.

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According to Bronsted-Lowry, what does a base do?

• It donates a proton (H⁺).

• It accepts a proton (H⁺)

• It produces H⁺ in water.

• It produces OH^- in water.

Answer explanation

A Bronsted-Lowry base accepts a proton.

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