Lesson Worksheet: Lewis Acids and Bases Chemistry
In this worksheet, we will practice explaining what Lewis acids and bases are, along with their characteristic properties, and identifying them in chemical reactions.
Q1:
Which of the following statements best defines a Lewis acid?
- AA substance that can donate a ion
- BA substance that can donate a pair of electrons
- CA substance that can accept a pair of electrons
- DA substance that produces ions
- EA substance that can accept a ion
Q2:
Fill in the blank: A species that can donate an electron pair is known as .
- Aa Lewis base
- Ba Brønsted–Lowry base
- Ca Brønsted–Lowry acid
- Da Lewis acid
- Ean Arrhenius base
Q3:
The equation below shows the reaction of borane with ammonia to form an ammonia–borane compound.
Which species acts as a Lewis acid?
- A
- B
- C
Which species acts as a Lewis base?
- A
- B
- C
Q4:
Water can react with ammonia and hydrogen chloride according to the following chemical equations.
According to these equations, how can water be defined in terms of Lewis’s theory?
- AA Lewis base
- BA Lewis acid
- CBoth, a Lewis acid and a Lewis base
Q5:
Which of the following reactions is an example of a Lewis acid–base reaction but not a Brønsted–Lowry acid–base reaction?
- A
- B
- C
- D
- E
Q6:
According to the Brønsted–Lowry theory, when ammonia gas is dissolved in water it will , forming .
- Agive up a proton,
- Baccept a proton,
- Caccept a proton,
- Dgive up a proton,
Q7:
Which of the following best describes the difference between a Brønsted–Lowry base and a Lewis base?
- AA Lewis base is a proton donor, while a Brønsted–Lowry base is a species that can accept an electron pair or more.
- BA Lewis base is a proton acceptor, while a Brønsted–Lowry base is a species that can donate an electron pair or more.
- CA Brønsted–Lowry base is a proton donor, while a Lewis base is a species that can accept an electron pair or more.
- DA Brønsted–Lowry base is a proton acceptor, while a Lewis base is a species that can donate an electron pair or more.
- EA Brønsted–Lowry base is an ion acceptor, while a Lewis base is a species that can donate an electron pair or more.
Q8:
Consider the reaction shown:
Which of the following is correct about the reaction?
- AAmmonia is the Lewis base which donates a lone pair of electrons, while water is the Lewis acid which accepts a lone pair of electrons.
- BAmmonia is the Lewis acid which donates a lone pair of electrons, while water is the Lewis base which accepts a lone pair of electrons.
- CAmmonia can act as a Lewis base as well as a Lewis acid which can donate or accept a lone pair of electrons.
- DAmmonia is the Lewis base which accepts a lone pair of electrons, while water is the Lewis acid which donates a lone pair of electrons.
Q9:
Fill in the blank: On dissolution of hydrogen chloride in water, water will act as a as it .
- ALewis base, accepts a proton to form a hydronium ion
- BBrønsted–Lowry base, accepts a proton to form a hydronium ion
- CBrønsted–Lowry acid, accepts a proton to form a hydronium ion
- DBrønsted–Lowry base, donates a proton to form a hydroxide ion
- ELewis acid, accepts a proton to form a hydronium ion
Q10:
Which of the following species is not a Lewis acid?
- A
- B
- C
- D
- E
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