Respuesta :
Answer:
[tex]Fe^{3+}[/tex]
Explanation:
Brønsted acid:-
Acids are the substances which dissociate in the aqueous medium to produce electrically charged atoms ( may be molecule). Out of these species furnished, one must be a proton or the hydrogen ion, [tex]H^+[/tex].
Lewis acid:-
Compound or the ionic species that can accept electron pair from the donor compound or the ionic species.
Thus, out of the given options, [tex]NH_3[/tex] is a base, [tex]H_2O[/tex] is neutral, [tex]H_3O^+[/tex] and [tex]HSO_4^-[/tex] are Brønsted acid.
The lewis acid is :- [tex]Fe^{3+}[/tex]
Answer : The correct option is, (a) [tex]Fe^{3+}[/tex]
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) [tex]Fe^{3+}[/tex]
It is a Lewis-acid because it can accepts electron pairs but not a Brønsted acid because it can not donates hydrogen ion.
(b) [tex]H_3O^+[/tex]
It is not a Lewis-acid because it can not accepts electron pairs but a Brønsted acid because it can donates hydrogen ion.
(c) [tex]HSO_4^-[/tex]
It is not a Lewis-acid because it can not accepts electron pairs but a Brønsted acid because it can donates hydrogen ion.
(d) [tex]NH_3[/tex]
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) [tex]H_2O[/tex]
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 [tex]Fe^{3+}[/tex] is a Lewis acid but not a Brønsted acid.
