for the following reactions label each species as an acid or a base. Indicate the species that are conjugate acids and conjugate bases.

A. HSO4-(acid) + NH3(base)<--> SO4^2-(conj base) + NH4+ (conj acid)
B. HPO4^2- (conj base)+ NH4+ (conj acid) <--> H2PO4-(acid) + NH3 (base)
C. SO3^2- (conj base) + NH4+ (conj acid) <--> HSO3- (acid) + NH3 (base)

I don't see anything wrong with any of your answers; however, I'm interested in answers B and C. I would have reversed the labels; i.e., I would have called HPO4^2-the base and H2PO4^- the conjugate acid. Same thing for the NH3/NH4^+ pair. What I'm getting at is that your answers imply that the NH4^+ is always the conjugate acid of NH3 but I think NH4^+ can be the acid and NH3 can be the conjugate base.

A.

- HSO4- is the acid
- NH3 is the base
- SO4^2- is the conjugate base
- NH4+ is the conjugate acid

B.
- HPO4^2- is the conjugate base
- NH4+ is the conjugate acid
- H2PO4- is the acid
- NH3 is the base

C.
- SO3^2- is the conjugate base
- NH4+ is the conjugate acid
- HSO3- is the acid
- NH3 is the base

To determine whether a species is an acid or a base in a chemical reaction, we need to look at its behavior in terms of donating or accepting protons (H+ ions). Acids are proton donors, whereas bases are proton acceptors.

Additionally, in each reaction, there are conjugate pairs formed. A conjugate acid-base pair is a pair of species that are related to each other by a transfer of a proton (H+). The acid donates a proton to the base, creating its conjugate base, while the base accepts a proton, creating its conjugate acid.

Let's analyze each reaction:

A. HSO4- (acid) + NH3 (base) ⇌ SO4^2- (conj base) + NH4+ (conj acid)
- In this reaction, HSO4- is an acid because it can donate a proton (H+).
- NH3 is a base because it can accept a proton.
- SO4^2- is the conjugate base of HSO4-, as it is formed when HSO4- donates a proton.
- NH4+ is the conjugate acid of NH3, as it is formed when NH3 accepts a proton.

B. HPO4^2- (conj base) + NH4+ (conj acid) ⇌ H2PO4- (acid) + NH3 (base)
- HPO4^2- is the conjugate base of H2PO4-, as it is formed when H2PO4- donates a proton.
- NH4+ is the conjugate acid of NH3, as it is formed when NH3 accepts a proton.
- H2PO4- is an acid because it can donate a proton.
- NH3 is a base because it can accept a proton.

C. SO3^2- (conj base) + NH4+ (conj acid) ⇌ HSO3- (acid) + NH3 (base)
- SO3^2- is the conjugate base of HSO3-, as it is formed when HSO3- donates a proton.
- NH4+ is the conjugate acid of NH3, as it is formed when NH3 accepts a proton.
- HSO3- is an acid because it can donate a proton.
- NH3 is a base because it can accept a proton.

In summary:
A. Acid: HSO4-, Base: NH3
Conjugate Base: SO4^2-, Conjugate Acid: NH4+

B. Acid: H2PO4-, Base: NH3
Conjugate Base: HPO4^2-, Conjugate Acid: NH4+

C. Acid: HSO3-, Base: NH3
Conjugate Base: SO3^2-, Conjugate Acid: NH4+

Remember, the behavior of a species as an acid or a base depends on the specific reaction it is involved in.