Acid Base Chemistry

Which of the following statements describes an electrolyte?

• An electrolyte conducts an electric current as a solid and does not dissolve in water.

• An electrolyte conducts electricity as a solid and dissolves in water.

• When an electrolyte dissolves in water, the resulting solution conducts an electric current.

• When an electrolyte dissolves in water, the resulting solution does not conduct an electric current.

Answer explanation

Electrolytes include acids, bases and ionic compounds like salts. They conduct electricity in the aqueous phase but not the solid phase due to the presence of dissolved ions.

Which of the following substances is an electrolyte?

• SiO2

• CCl4

• H2SO4

• C6H12O6

Answer explanation

Electrolytes are substances which dissociate or separate to form ions in solution but not in solid state. Acids bases and ionic salts are electrolytes. Molecular compounds like C6H12O6 are nonelectrolytes.

Which of the following describes an Arrhenius Base?

• A compound which produces Hydrogen ions (H+) in solution.

• A compound which produces hydroxide ions (OH-) in solution.

• A compound which accepts Hydrogen ions (H+) in solution

• A compound which accepts Hydroxide ions (OH-) ions in solution

Which of the following describes an Arrhenius acid?

• A compound which produces Hydrogen ions (H+) in solution.

• A compound which produces hydroxide ions (OH-) in solution.

• A compound which accepts Hydrogen ions (H+) in solution

• A compound which accepts Hydroxide ions (OH-) ions in solution

Which of the following is an example of an Arrhenius base?

• Ca(OH)2

• HCl

• H3PO4

• CH3COOH

Answer explanation

Arrhenius base is typically a metal + an OH hydroxide ion.

HCl and CH3COOH are arrhenius acids and found in Table K

According to one acid-base theory, a base is an

• H2 acceptor

• H+ donor

• H2 donor

• H+ acceptor

Answer explanation

Bronsted Lowry theory states that bases are able to accept protons.

According to one acid-base theory, an acid is an

• H2 acceptor

• H+ donor

• H2 donor

• H+ acceptor

Answer explanation

Bronsted Lowry theory states that acids are able to donate protons (H+).

In a neutralization reaction, an aqueous solution of an Arrhenius acid

reacts with an aqueous solution of an Arrhenius base to produce

• an ether and water

• a salt and water

• an ether and an alcohol

• a salt and an alcohol

The acidity or alkalinity of a solution can be measured by its

• freezing point

• pH value

• boiling point

• electronegativity vale

Identify the positive ion in the given sample of HBr (aq)

• H+

• OH+

• Br-

• Br+