C3.1.4

• What are anions?

  Negatively charged ions
• List the three anion tests:

  • carbonates ( CO32- )
  • sulfates ( SO42- )
  • Halides ( Cl- Br- I- )
• What is the logic behind the carbonate test?

  • carbonates react with acids to form carbon dioxide gas
  • metal carbonate + acid → salt + carbon dioxide + water