ICP 12/18/12 Review of Chemical Reactions

Warmup For 1-4 write endothermic or exothermic: 1)Gives off heat 2)Takes in heat 3)Reactants + heat  Products 4)Reactants  Products + heat

Which type of reaction is it? 1)___ NaBr + ___ H 3 PO 4  ___ Na 3 PO 4 + ___ HBr 2)____ C 2 H 4 + ____ O 2  ____ CO 2 + ____ H 2 O 3)____ PbSO 4  ____ PbSO 3 + ____ O 2 4)____ H 2 O + ____ SO 3  ____ H 2 SO 4 5)____ Mg + ____ Fe 2 O 3  ____ Fe + ____ MgO

Balance each reaction. 1)___ NaBr + ___ H 3 PO 4  ___ Na 3 PO 4 + ___ HBr 2)____ C 2 H 4 + ____ O 2  ____ CO 2 + ____ H 2 O 3)____ PbSO 4  ____ PbSO 3 + ____ O 2 4)____ H 2 O + ____ SO 3  ____ H 2 SO 4 5)____ Mg + ____ Fe 2 O 3  ____ Fe + ____ MgO

Extra information in a chemical reaction: (l) – liquid (s) – solid (g) – gas (aq) – aqueous (something dissolved in water)

Other information: Why do we balance chemical equations? – In order to make chemical reactions obey the Law of Conservation of Mass How many dots in an electron dot diagram? – This is based on what column an element is in on the periodic table.

Time to work on Study Guide Study guide is due on Thursday (day of the test).