Unit 7: Redox & ElectrochemistryWhat’s the point ?•Electrical production (batteries, fuel cells)REDOX reactions are important in …•Purifying metals (e.g. Al, Na, Li)•Producing gases (e.g. Cl2, O2, H2)•Electroplating metals•Protecting metals from corrosion•Balancing complex chemical equations•Sensors and machines (e.g. pH meter)What is Redox?•REDOX stands for REDuction/OXidation•Oxidation is often thought of as a combination of a substance with oxygen (rusting, burning)•Just like with acid/base definitions the definition of oxidation is expanded•Oxidation refers to a loss of electrons•Reduction refers to a gain of electrons•As a mnemonic remember LEO says GER•Loss Electrons = Oxidation•Gain Electrons = Reduction•Read 12.1 (pg. 443 - 445)Testing conceptsQ- What is oxidation? What is reduction? Represent each as a chemical equation.Q- Why are 2Na+Cl2→2NaCl & 2H2+O2→H2O considered redox reactions?
This is the end of the preview.
access the rest of the document.