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.


Complete the following sentence: For the reaction below, the hydrogen phosphate ion ( H P O ) 4 2 behaves as .

+ + H 2 PO 4 H PO 4 2− N H 3 + N H 2
  • Aa chelator
  • Ban acid
  • Ca catalyst
  • Da base


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

  • ALowry bases
  • BBrønsted acids
  • CBrønsted-Lowry bases
  • DBrønsted-Lowry acids


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

  • AHydrogen donor
  • BLewis acid
  • CLewis donor
  • DLewis base
  • EHydrogen acceptor

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