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WorksheetsStrength of Acids & Alkalis
Total questions: 9
Worksheet time: 8mins
What is the definition of an acid?
It ionizes in water to form hydrogen ions, H-.
It ionizes in water to form hydrogen ions, H+.
It ionizes in water to form hydroxide ions, OH-.
It ionizes in water to form hydroxide ions, OH+.
Select the statement(s) that is/are true about alkalis.
Alkalis ionize in water to form hydroxide ions, OH-.
Compared to weak alkalis, strong alkalis produce less hydroxide ions when dissolved in water.
Sodium hydroxide is a strong alkali, whereas calcium hydroxide is a weak alkali.
The stronger the alkali, the larger its degree of dissociation / ionization to produce ions.
Based on the four given equations, select the strong acids.
HA (aq)
H2B (aq)
H2C (aq)
H3D (aq)
Calcium hydroxide is a strong alkali. Which equation correctly shows the ionization of calcium hydroxide in water?
Ca2+ (aq) + 2OH- (aq) --> Ca(OH)2 (aq)
Ca(OH)2 (aq) --> Ca2+ (aq) + (OH-)2 (aq)
Ca(OH)2 (aq) --> Ca2+ (aq) + 2OH- (aq)
Ca(OH)2 (aq) --> Ca2+ (aq) + 2H+ (aq) + 2O2- (aq)
Select the true statements based on this equation.
NH4OH dissolves in water to produce many OH- ions.
NH4OH dissolves in water to produce little OH- ions.
NH4OH is a weak alkali.
NH4OH is a weak acid.
Ethanoic acid, CH3COOH, is a weak acid.
Select the ions that are produced when it dissolves in water.
H+
CH3CO+
OH-
CH3COO-
Hydrochloric acid, HCl is a monobasic acid.
What do you think is the term used to describe sulfuric acid, H2SO4?
monobasic
dibasic
tribasic
Select the term(s) that can be used to describe phosphoric acid.
weak
strong
monobasic
tribasic
Select the terms that you would choose to describe calcium hydroxide, Ca(OH)2.
strong alkali
weak alkali
monobasic alkali
dibasic acid
dibasic alkali
