In each reaction, identify the Brønsted–Lowry acid, the Brønsted–Lowry base, the conjugate acid, and the conjugate base. a. H2CO3(aq) + H2O(l) ∆ H3O+(aq) + HCO3 -(aq) b. NH3(aq) + H2O(l) ∆ NH4 +(aq) + OH-(aq)

H2CO3(aq) + H2O(l)   →   H3O+(aq)      +   HCO3 -(aq)

Acid                Base          Conj. base          Conj. acid

NH3(aq)    +    H2O(l)   →  NH4+(aq)    +    OH-(aq)

Base                Acid          Conj. acid         Conj. base

Explanation:

Brønsted–Lowry's theory:

Acid → Donates H⁺

Base → Acceptes H⁺

H2CO3(aq) + H2O(l)   →   H3O+(aq)      +   HCO3 -(aq)

Acid                Base          Conj. base          Conj. acid

NH3(aq)    +    H2O(l)   →  NH4+(aq)    +    OH-(aq)

Base                Acid          Conj. acid         Conj. base

the dissolution of polymer can be thermodynamically described in 2 steps.