CHEM 1061 1st Edition Lecture 8Outline of Last Lecture I. Total Ionic EquationII. Net Ionic EquationIII. Acid-Base Reactionsa. Acidb. Basec. Weak Acids/BasesReactions of Acid + CarbonateOutline of CurrentIV. TitrationV. Oxidation-Reduction Reactions (Redox)a. Ionicb. Covalentc. Oxidationd. Reductione. Oxidizing agentf. Reducing agentg. Oxidation numberVI. Using Oxidation Numbers to Identify Redox ReactionCurrent LectureTitrationThese 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 baseWhat 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 = 16.7mLOxidation-Reduction Reactions (Redox): Movement of e- from reactant with less attraction for e- to reactant with more attraction for e-Ionic: transfer of e-2Mg(s)+O2(g)2MgO(s)Covalent: shift of e-H2(g)+Cl2(g)2HCl(g)Oxidation: loss of electronsReduction: gain of electronsOxidizing Agent:species doing the oxidizing; gets reduces; takes e-Reducing Agent: species doing the reducing; gets oxidized; gives up e-Oxidation Number: (ON) Table 4.4Group 1A= +1H+ = +1Oxygen = -2Halogens= -1Determine ON for each element in:A) zinc chlorideB) sulfur trioxide]a) ionic bond, ZnCl2, ON = +2 -1b) covalent bond, SO3, ON = +6 -2Using Oxidation Numbers to Identify Redox ReactionsRedox 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
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