Conjugate Acid-Base Pairs

The substance that differs by only an H⁺ (which is the conjugate base) from HNO₂:​ (a)  

The substance that differs by only an H⁺ (which is the conjugate acid) from NH₃:​ (b)  

By ANY definition, H₃O⁺ (or H⁺) is always, always, always a(n)​ (a)   !

By ANY definition, OH^- is always, always, always a(n)​ (b)   !

• ACID
• BASE
• Neutral

What is the correct acid/conjugate base pair for the ionization of ammonia?

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

• NH₃ / H₂O

• NH₃ / NH₄⁺

• H₂O / NH₄⁺

• H₂O / OH^-

What is the correct acid/conjugate base pair for ionization of H₂PO₄^-(aq)?

 

       H₂PO₄^-(aq)  +  H₂O(l) →  HPO₄^2-(aq)  +  H₃O⁺(aq)

• H₂PO₄^- / H₂O

• H₂PO₄^- / HPO₄^2-

• H₂PO₄^- / H₃O⁺

• HPO₄^2- / H₃O⁺

What does the term amphoteric mean?

• proficient using both right and left hands

• able to survive in the water or on the land

• can act as either an acid or a base

• can be either a cation or an anion

On the reactant side of the equation, label the acid and the base.

On the product side of the equation label the conjugate acid and the conjugate base.

a

b

c

d

ACID

BASE

Conjugate BASE

Conjugate ACID

On the reactant side of the equation, label the acid and the base.

On the product side of the equation label the conjugate acid and the conjugate base.

a

b

c

d

BASE

Conjugate BASE

ACID

Conjugate ACID