Worksheet: Roles of Reagents in Chemical Equations

In this worksheet, we will practice using oxidation states in chemical equations to identify acids, bases, oxidants, reductants, and spectator species.

Q1:

Complete the following sentence: For the reaction below, the hydrogen phosphate ion (HPO)42 behaves as .

+ + H 2 PO 4 H PO 4 2− N H 3 + N H 2
  • Aan acid
  • Ba base
  • Ca chelator
  • Da catalyst

Q2:

Which term best describes the role of proton donors in acid–base reactions?

  • ABrønsted–Lowry acids
  • BLewis acid
  • CBrønsted–Lewis bases
  • DLewis base

Q3:

In a chemical reaction, what is a species that supplies a pair of electrons to form a dative covalent bond called?

  • ALewis donor
  • BHydrogen donor
  • CLewis acid
  • DLewis base
  • EHydrogen acceptor

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