1. Writing Word Equations

2. Word Equations n Reactants  Products n  represents “yields” n How would you describe the reaction when iron combines with oxygen to make iron (III) oxide? n Fe+ O 2  Fe 2 O 3

3. Physical Forms n Solid (s) n Liquid (l) n Gas (g) n Aqueous (aq) - dissolved in water

4. How do you write a word equation? n Write the names of reactants n Separate with an arrow (Yields) n Write the names of the products n Diatomics (7)

5. Diatomics n H 2, N 2, O 2, F 2, Cl 2, Br 2, I 2 n I Bring Clay For Our New Home

6. Examples: n Turn into word equations: –NH 4 Cl + NaOH  NH 4 OH + NaCl –ammonium chloride and sodium hydroxide yield ammonium hydroxide and sodium chloride –CS 2 + F 2  CF 4 + S –carbon disulfide and fluorine yield carbon tetrafluoride and sulfur

7. Examples: n hydrogen and nitrogen monoxide yield water and nitrogen n sodium phosphate and calcium chloride yield calcium phosphate and sodium chloride