After considering the reaction HClO₃ + NH₃ ⇄ NH₄⁺ + ClO₃⁻, you conclude that NH₃, NH₄⁺ is the base-conjugate acid pair.
When you consider the reaction HClO₃ + NH₃ ⇄ NH₄⁺ + ClO₃⁻, to determine which is a base-conjugate acid pair, you use the Bronsted-Lowry model for acids and bases, which is focused in the hydrogen ion (H⁺):Acid is a donor of hydrogen ions, H⁺.Base is a receptor of hydrogen ions.In this equilibrium, the forward reaction, HClO₃ + NH₃ → NH₄⁺ + ClO₃⁻, is the reaction of an acid with a base. In the same equilibrium, the reverse reaction, NH₄⁺ + ClO₃⁻ → HClO₃ + NH₃ is also the reaction of an acid and a base, but they are called conjugate acid and conjugate base.
You can represent them in this way:
HClO₃ + NH₃ ⇄ NH₄⁺ + + ClO₃⁻
↑ ↑ ↑ ↑
acid base conjugate acid conjugate base
So, the base-conjugate acid pair is NH₃, NH₄⁺ .
NH3 and NH4+
NH4+ is the conjugate acid of the base NH3.
So to summarize, It is answer B on E2020.
The pair will be:
A conjugate acid is formed after a base has reacted/accepted a proton.
Since H2O is amphiprotic, we can use it as the acid.
NH3 + H2O ⇄ NH4⁺ + OH⁻
ClO⁻ + H2O ⇄ HClO + OH⁻
after reacting, the base form conjugate acid.
From the equation;
NH3 is the base; while NH4+ is the conjugate acid
HNO3 is the acid; while NO3- is the conjugate baseThe conjugate base of a Brønsted-Lowry acid is species that is formed after an acid donates a proton while the conjugate acid of a Brønsted-Lowry base is the species formed after a base accepts a proton.
base CH3NH2; conjugate acid: CH3NH3 +
When a base CH3CH2 accept proton it form its conjugate acid which known as methyl ammonium ion. Therefore conjugate acid of CH3CH2 is CH3NH3+ ion
For example when CH3CH2 react with HCl
CH3CH2 +HCl → CH3CH3+ + Cl-
HCIO3 + NH3 → NH4* + C103-
Which is a base-conjugate acid p...