CHEM 1061 1st Edition Lecture 8 Outline of Last Lecture I Total Ionic Equation II Net Ionic Equation III Acid Base Reactions a Acid b Base c Weak Acids Bases Reactions of Acid CarbonateOutline of Current IV Titration V Oxidation Reduction Reactions Redox a Ionic b Covalent c Oxidation d Reduction e Oxidizing agent f Reducing agent g Oxidation number VI Using Oxidation Numbers to Identify Redox Reaction Current Lecture Titration These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Used to determine unknown concentrations of solutions against a known concentration Equivalence Point mol of H from acid mol of OH from base What Volume of 0 15 M Ba OH 2 would neutralize 50 00mL of 0 100 M HCl Hint You need a balanced equation Ba OH 2 aq 2HCl aq 2H2O l BaCl2 aq 0 05000L HCl x 0 100 molHCl 1L HCl x 1 mol Ba OH 2 2 molHCl x 1L Ba OH 2 0 15 mol Ba OH 2 x 1000mL 1L 16 7mL Oxidation Reduction Reactions Redox Movement of e from reactant with less attraction for e to reactant with more attraction for eIonic transfer of e2Mg s O2 g 2MgO s Covalent shift of eH2 g Cl2 g 2HCl g Oxidation loss of electrons Reduction gain of electrons Oxidizing Agent species doing the oxidizing gets reduces takes eReducing Agent species doing the reducing gets oxidized gives up eOxidation Number ON Table 4 4 Group 1A 1 H 1 Oxygen 2 Halogens 1 Determine ON for each element in A zinc chloride B sulfur trioxide a ionic bond ZnCl2 ON 2 1 b covalent bond SO3 ON 6 2 Using Oxidation Numbers to Identify Redox Reactions Redox Reactions are changes in oxidation numbers If the ON increases becomes more positive it lost electrons and oxidation occurred If the ON decreases becomes less positive it gains electrons and reduction occurred
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