Which descriptions are correct for both a Brønsted–Lowry acid and a Lewis acid?

B

Which definition of a base is correct?

A.     A Lewis base accepts a proton.

B.     A Brønsted-Lowry base accepts an electron pair.

C.     A Brønsted-Lowry base donates an electron pair.

D.     A Lewis base donates an electron pair.

D

Which substance can act as a Lewis acid but not as a Brønsted–Lowry acid?

A.     HCl

B.     CH₃COOH

C.     BF₃

D.     CF₃COOH

C

Which are definitions of an acid according to the Brønsted-Lowry and Lewis theories?

A

Which species cannot function as a Lewis acid?

A.     \({\text{B}}{{\text{F}}_{\text{3}}}\)

B.     \({\text{AlC}}{{\text{l}}_{\text{3}}}\)

C.     \({\text{CC}}{{\text{l}}_{\text{4}}}\)

D.     \({{\text{H}}^ + }\)

C

Whilst 42% correctly identified \({\text{CC}}{{\text{l}}_{\text{4}}}\) the most popular wrong answer (38%) was the \({{\text{H}}^ + }\) ion.

Which statement explains why ammonia, \({\text{N}}{{\text{H}}_{\text{3}}}\), is classified as a Lewis base?

A.     It can accept a proton.

B.     It can accept a lone pair of electrons.

C.     It can donate a lone pair of electrons.

D.     It can donate a proton.

C