Lesson Worksheet: Conjugate Acid–Base Pairs Chemistry • 10th Grade

In this worksheet, we will practice identifying conjugate acids and bases in chemical equations and predicting their relative acid or base strengths.

Q1:

NH3 is the conjugate acid in the following equation: NH()+HO+HO323+aq What is the missing term?

  • ANH24
  • BNH4+
  • CNH2
  • DNH3

Q2:

Give the formula and state the symbol of the missing compound in the following equation: HSO()+OH()+HO()32aqaql

  • ASO()32aq
  • BSO()2g
  • CHSO()24aq
  • DHSO()23aq
  • EHS()2g

Q3:

HPO24 is the conjugate base in the following equation: HPO+HO+OH242 What is the missing term?

  • AHPO23+
  • BHPO34
  • CHPO24
  • DPO43
  • EHPO42

Q4:

Consider the following equation: NH()+HO+OH32aq In the equation shown, NH3 is the conjugate base. What is the missing term?

  • ANH3
  • BNH24
  • CNH2
  • DNH4+

Q5:

In the following equation, NH3 is the conjugate base: NH()+HO+OH32aq What is the missing term?

  • ANH3
  • BNH24
  • CNH4+
  • DNH2

Q6:

In the following equation, HPO24 is the conjugate acid: HPO+HO+HO2423+ Find the missing term.

  • AHPO23+
  • BHPO24
  • CHPO34
  • DHPO42
  • EPO43

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