Chemistry: Acids and Bases

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.

Tags

HS-PS1-B

A student tests an unknown aqueous solution and finds it conducts electricity and turns litmus paper red. What can the student infer?

• The solution contains an acid.

• The solution contains a base.

• The solutions is neutral.

Answer explanation

Acidic solutions conduct electricity and turn litmus paper red.

Tags

HS-PS1-B

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

a

b

c

d

acid

conjugate base

base

conjugate acid

Tags

HS-PS1-B

Click on the acid.

Tags

HS-PS1-B

Click on the base.

Tags

HS-PS1-B

Click on the conjugate base.

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HS-PS1-B

Click on the conjugate acid.

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HS-PS1-B

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.

Tags

HS-PS1-B

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.

Tags

HS-PS1-B

What is the pOH of a solution that has a pH of 2?

• 10
• 12
• 14
• 1