Conjugate Acids & Bases Pairs

Front

What is a conjugate acid-base pair?

Back

A conjugate acid-base pair consists of two species that differ by the presence or absence of a proton (H+). The acid donates a proton, while the base accepts a proton.

Front

What happens to a base when it gains a proton?

Back

When a base gains a proton, it becomes its conjugate acid.

Front

What is the conjugate base of a strong acid?

Back

The conjugate base of a strong acid is typically a very weak base, often unable to accept protons.

Front

In the reaction H2O + NH3 ↔ OH- + NH4+, what is the role of NH3?

Back

NH3 acts as a base because it accepts a proton from water (H2O).

Front

What is the conjugate acid of NH3?

Back

The conjugate acid of NH3 is NH4+.

Front

What is the conjugate acid of HCO3-?

Back

The conjugate acid of HCO3- is H2CO3.

Front

What is the conjugate acid of NH2-?

Back

The conjugate acid of NH2- is NH3.

Front

What is the conjugate acid of SO4^2-?

Back

The conjugate acid of SO4^2- is HSO4-.

Front

How do you identify a conjugate base in a reaction?

Back

A conjugate base can be identified as the species that remains after an acid donates a proton.

Front

What is the relationship between strong acids and their conjugate bases?

Back

Strong acids have weak conjugate bases, meaning they do not readily accept protons.