StudentLecture_02

StudentLecture_02 - Goggle/iClicker/Lock Sale ❚ 8:00 AM...

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Unformatted text preview: Goggle/iClicker/Lock Sale ❚ 8:00 AM – 4:00 PM, ❚ Mon – Fri, Jan 10 – 21 ❚ Outside WTHR 200 Calculator Sale ❚ 8:00 AM – 3:00 PM, ❚ Mon – Fri, Jan 10 – 14, 18-19 ❚ Outside WTHR 200 Announcements NEW! Lab reading assignment for next weeks lab (Lab 2 Electrolytes/non-electrolytes): Section 3.5 (Ions and Molecules in Aqueous Solution) and Sec. 3.7 (Acids and Bases) Reminder: Check in BLACKBOARD/My Grades to see if you passed your safety quiz (12/15 correct) BEFORE you go to lab next week. Homework 1 & 2 due Fri 1/21/11 by 11:59 pm covers ❚ Introduction to OWL ❚ Math concepts (some different from CHM115) ❚ Covers Week 1 - Reactions & Stoichiometry Introduction to Lab next week: Electrolytes & Nonelectrolytes (& Acid-Base Reactions) Definition of Electrolyte: compound whose aqueous solution ________________________ [all soluble ionic compounds and compounds that react with water to give ions (molecular acids and bases) are electrolytes] Lab reading assignment: Sec. 3.5 Ions and Molecules in Aqueous Solution Sec. 3.7 Acids and Bases Battery NaCl (s) Na + (aq) + Cl- (aq) ___ Ethanol (l) CH 3 CH 2 OH ethanol (aq) ___ Sucrose (s) sucrose (aq) ___ HCl (g) + H 2 O (l) H 3 O + (aq) + Cl- (aq) ___ Demo Strong and Weak Electrolytes Using acids and bases as examples… 1) An acid is a substance that, when dissolved in water, ______________________________________________, in solution 2) An acid is a _______________________ A base is a proton, H + , acceptor HCl (g) + H 2 O H 3 O + (aq) + Cl- (aq) Hydrochloric acid is a _________________ (and a strong acid), it dissociates completely in H 2 O (~100% product at equilibrium) CH 3 COOH (aq) + H 2 O H 3 O + (aq) + CH 3 COO- (aq) Acetic acid is a ___________________ (and a weak acid), it dissociates only slightly in H 2 O (<1% product at equilibrium) NH 3(aq) + H 2 O NH 4 + (aq) + OH- (aq) Ammonia is a _____________________ (and a weak base) Demo iClicker Question #1 Iron ore is converted to iron metal in a reaction with carbon. 2 Fe 2 O 3 + 3 C 4 Fe + 3 CO 2 How many moles of ____ are produced from 6.2 moles of Fe 2 O 3 ? STOICHIOMETRY STOICHIOMETRY- the study of the quantitative aspects of chemical reactions. Mass reactant Stoichiometric factor from equation Moles reactant Moles product Mass product General Plan for Stoichiometry Calculations Molarity reactant Molarity product Calculating amounts of reactants and products Calculating amounts of reactants and products PROBLEM: If 454 g of NH PROBLEM:...
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This note was uploaded on 02/27/2012 for the course CHEM 116 taught by Professor Stevenson during the Spring '08 term at Purdue.

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StudentLecture_02 - Goggle/iClicker/Lock Sale ❚ 8:00 AM...

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