Acid-Base Theories
Chemistry ⇒ Acids, Bases, and Salts
Acid-Base Theories starts at 9 and continues till grade 12.
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See sample questions for grade 10
A student mixes NH3 and HCl gases in a closed container. According to the Bronsted-Lowry theory, which acts as the acid and which as the base?
Describe what is meant by the term 'amphiprotic' and give an example.
Explain why BF3 is considered a Lewis acid but not a Bronsted-Lowry acid.
Explain why HCl is considered an acid in all three theories: Arrhenius, Bronsted-Lowry, and Lewis.
A student mixes NH3 and HCl gases in a closed container. According to the Bronsted-Lowry theory, which acts as the acid and which as the base?
Which of the following is a Lewis base?
(1) H+
(2) NH3
(3) BF3
(4) AlCl3
Which of the following is a limitation of the Bronsted-Lowry theory?
(1) It cannot explain acid-base reactions in non-aqueous solvents
(2) It cannot explain acid-base reactions that do not involve proton transfer
(3) It only applies to aqueous solutions
(4) It cannot explain the basicity of ammonia
Which of the following is an example of a Lewis acid-base reaction?
(1) HCl + NaOH → NaCl + H2O
(2) NH3 + BF3 → F3B–NH3
(3) H2SO4 + H2O → H3O+ + HSO4-
(4) NaOH → Na+ + OH-
Which of the following is NOT a Bronsted-Lowry base?
(1) NH3
(2) OH-
(3) H2O
(4) HCl
Which of the following is NOT a limitation of the Arrhenius theory?
(1) It only applies to aqueous solutions
(2) It cannot explain acid-base reactions in non-aqueous solvents
(3) It includes substances that do not produce ions
(4) It does not explain the basicity of ammonia
Which of the following is the conjugate base of H2SO4?
(1) HSO4-
(2) SO42-
(3) H3O+
(4) OH-
Which of the following is the correct definition of an acid according to the Arrhenius theory?
(1) A substance that increases the concentration of hydroxide ions in water
(2) A substance that increases the concentration of hydrogen ions in water
(3) A substance that donates an electron pair
(4) A substance that accepts a proton
According to the Bronsted-Lowry theory, a base is a substance that ________ a proton.
Fill in the blank: According to the Lewis theory, an acid is an electron pair ________.
Fill in the blank: In the Bronsted-Lowry theory, acids are proton ________ and bases are proton ________.
Fill in the blank: In the reaction H2O + H2O → H3O+ + OH-, the species acting as a base is ________.
True or False: A substance that donates an electron pair is called a Lewis base.
True or False: According to the Arrhenius theory, NaOH is considered a base because it produces OH- ions in water.
True or False: According to the Lewis theory, all Bronsted-Lowry acids are also Lewis acids.
True or False: All Lewis acids are also Bronsted-Lowry acids.
