ESCI 350 – Chem 30 Quiz Winter 2012 Miss Little Name: ___________________ 1. Oxidation and reduction reactions are called REDOX reactions. Give 3 examples of REDOX reactions that occur in everyday life. -rusting (or corrosion) -batteries -bleaching agents -metabolism -burning (or combustion) -decay -digestion 2. State which acronym you use for remembering what oxidation and reduction mean. Then, explain what the acronym stands for. Possible answers: OIL RIG: Oxidation Is Loss of electrons; Reduction is Gain LEO says GER: Loss of Electrons = Oxidation; Gain of Electrons = Reduction 3. True or False: The following redox reaction is balanced: K(s) + Cr3+(aq) Cr(s) + 3K+(aq) Answer: False 4. In this simple cell diagram, which element is being oxidized? Zinc ESCI 350 – Chem 30 Quiz Winter 2012 Miss Little 5. In the following reaction, identify whether calcium is being oxidized or reduced and whether hydrogen is being oxidized or reduced. Ca(s) + 2 H2O(l) Ca(OH)2(aq) + H2(g) 0 Calcium = oxidized Hydrogen = reduced +1 -2 +2 -2 +1 0