lect_11nov3f09

lect_11nov3f09 - Outline 11 3-NOV-2009 1. Review...

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1 Outline 11 3-NOV-2009 1. Review - (strong?)) , Ion Stoichiometry, redox (O.N.) 2. Acid-Base Theory (again) - Brønsted –Lowrey acid -proton donor base - proton acceptor 3. Redox (Continue) (Oxidation-Reduction)- Oxidation #, changes, e - ‘s, agents, eqns.
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2 Chemical Reaction Types (review) 1.Exchange (metathesis)? A. Precipitation (Insoluble ion combination)? B. Neutralization (acid-base)? 2. Redox O.N. (ox #) changes
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3 Writing Reactions (review again!) Ionic Equations 1. Write strong electrolytes (soluble ionic compounds, strong acids & bases) as separated ions. 2. Write insoluble ionic compounds as unseparated ions (formulas). 3. Write weak electrolytes (weak acids & bases) and nonelectrolytes (molecular (covalent)) as undissociated molecules . Use solubility rules and strong A-B list.
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4 Solubility Rules (“common” Ionic Compounds) [‘ordinary’ temperatures] (Follow sequence* ) AGAIN!! A. Soluble 1. Group IA and NH 4 + 2. NO 3 - ,C 2 H 3 O 2 - , ClO 4 - (most), ClO 3 - B. Mostly Soluble 1. (Cl - , Br - , I - ) (except Ag + , Pb 2+ , Hg 2 2+ ,Cu + ) F - (except Pb +2 and group 2A). Group 7A (halides). 2. SO 4 2- (except Ag + , Pb 2+ , group 2A Ca +2 and down) C. Insoluble 1. PO 4 3- , CO 3 2- , O 2- , S 2- (except 2A), OH - (except group 2A, Ca +2 and down) *Earlier ‘Rules’ trump later ones. Print this slide and use in homework.
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5 Strong Acid & Base Identification; AGAIN! A. Strong Acids (FEW so can learn easily through using). HNO 3 , HClO 4 , HClO 3 , H 2 SO 4 (first H strong) Oxoacids in general, H x AO y , strong if y ≥ (x+2) HCl, HBr, HI (Group VII A [not HF]) B. Strong Bases Hydroxides of Group 1A and IIA (not Be) Print this slide and use in problem solving.
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6 Acid-Base Classification (review) Classify (acid or base (aq), strong or weak) and name (a) HBrO (b) HCNO (cyanic acid, classify only) (c) Sr(OH) 2 (d) HI
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7 Name________ Sample Quiz 13 TA ______ 1. (3) Classify as to (H 2 O) soluble or insoluble . a. BaCO 3 b. Na 2 CO 3 c. Fe(NO 3 ) 3 2. (2) Classify (aq) as to acid, base, weak, strong. a. LiOH b. HClO 2
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Chemical Reaction Types (review), Ex. 1 Ex: lead(II) nitrate mixed with potassium iodide 1. Write formulas of reactants Pb(NO 3 ) 2 + KI → 2. Write formulas of possible products (exchange) Pb(NO 3 ) 2 + KI → PbI 2 + KNO 3 Pb(NO 3 ) 2 (aq) + 2 KI (aq) → PbI 2 (s) + 2 KNO 3 (aq) 4. Write ionic eqn. Pb +2 (aq) + 2 NO 3 - (aq) + 2 K + (aq) + 2 I - (aq) → PbI 2 (s) + 2 K + (aq) + 2 NO 3 - (aq) 5. Write net ionic eqn. (see step 4) Cancel spectator ions. Pb
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This note was uploaded on 10/14/2011 for the course CHEM 1A taught by Professor Okamura during the Spring '08 term at UC Riverside.

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lect_11nov3f09 - Outline 11 3-NOV-2009 1. Review...

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