Which is a lewis acid but not a brønsted acid? select one: a. fe3+ b. h3o+ c. hso4– d. nh3 e. h2o

Answer : The correct option is, (a)

Explanation :

According to the Bronsted Lowry concept, Bronsted Lowry-acid is a substance that donates one or more hydrogen ion in a reaction and Bronsted Lowry-base is a substance that accepts one or more hydrogen ion in a reaction.

According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs.

(a)

It is a Lewis-acid because it can accepts electron pairs but not a Brønsted acid because it can not donates hydrogen ion.

(b)

It is not a Lewis-acid because it can not accepts electron pairs but a Brønsted acid because it can donates hydrogen ion.

(c)

It is not a Lewis-acid because it can not accepts electron pairs but a Brønsted acid because it can donates hydrogen ion.

(d)

It is not a Lewis-acid because it can not accepts electron pairs but a Brønsted acid and a base because it can donates and accept hydrogen ion.

(e)

It is not a Lewis-acid because it can not accepts electron pairs but a Brønsted acid and a base because it can donates and accept hydrogen ion.

Hence, the is a Lewis acid but not a Brønsted acid.

i believe the answer is a.

the answer is c i believe