Acid and Bases, Kw

All (Arrhenius) acids contain at least one hydrogen atom.

• True

• False

All substances that contain hydrogen atoms are acids.

• True

• False

Acids only display their properties when they are added to ____________ (1 word).

All bases are alkalis.

• True

• False

All alkalis are bases.

• True

• False

The higher the concentration of an acid, the stronger the acid.

• True

• False

The lower the pH of an acid, the stronger the acid.

• True

• False

The higher the concentration of an acid, the lower its pH.

• True

• False

The _____________ (1 word) of an acid or alkali refers to the extent it ionises to produce H⁺ or OH^- when dissolved in water.

Which of the following statements is correct about the weak base, ammonia (NH₃)?

• It dissociates completely in water to produce a high concentration of hydroxide ions.

• It dissociates partially in water to produce a low concentration of hydrogen ions.

• It dissociates partially in water to produce a high concentration of hydroxide ions.

• It dissociates partially in water to produce a low concentration of hydroxide ions.