Chem 161-2010 Lecture 5

Chem 161-2010 Lecture 5 - ET See review session notes for...

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ET: See review session notes for possible update or other examples. CHEMISTRY 161-2010 LECTURE 5 ANNOUNCEMENTS E-MAIL Don’t let your mailboxes get full. Add your name and e-mail address if it isn’t already listed, i.e., if  you haven’t been receiving e-mail correspondence from me (list in  front of room). HOURLY EXAM Exam I: Wednesday, Sept. 22, 9:40 – 11:00 PM, chapters 1 to 3.8, Scott 123 Chem 161-2010 Lecture 5 1
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Chapter 3 : CHEMICAL EQUATIONS STOICHIOMETRY OF CHEMICAL REACTIONS LIMITING REACTANT AND YIELD CALCULATIONS SOLUTION STOICHIOMETRY • MOLARITY Chem 161-2010 Lecture 5 2
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ET note: Not everything goes through moles, e.g., volume to grams, grams to volume, atoms to molecules, molecules to atoms. ZUMDAHL 6 TH EDITION CHEM 161-2007 RECITATION 4th WEEK CHAPTER 5 - STOICHIOMETRY Chem 161-2010 Lecture 5 3 A MOLE moles A moles B atoms molecules (or atoms if particle is an atom) M B or V B g B or MW B V B M A or V A V A g A or MW A MOLES ARE AT THE CENTER (FOR CONVERSIONS, WORK THROUGH MOLES) MW (D = g/V) mol A = M A L A moles = PV/RT for gases (molecules x atoms/molecule = atoms) (moles A = g A /MW A ) mol B = M B L B (moles B = g B /MW B ) (D = g/V) (moles x Avog. No. = molecules (or atoms)) %A % B Empirical formula Molecular formula (MW/EW) x Emp form = molec form moles = g/MW PV = nRT moles = M x V P 1 V 1 /n 1 T 1 =P 2 V 2 /n 2 T 2 g/MW = M x V 6.022x10 23 molecule/mole D = g/L MW A or AW A = g A /mole A moles A = g A /MW A
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PERIODIC TABLE Atomic Numbers 1A 2A 3B 4B 5B 6B 7B 8B 8B 8B 1B 2B 3A 4A 5A 6A 7A 8A H 1 1.008 He 2 Li 3 6.941 Be 4 9.012 2 B 5 10.81 1 C 6 12.01 1 N 7 14.00 7 O 8 15.99 9 F 9 18.99 8 Ne 10 20.18 0 Na 11 22.99 0 Mg 12 24.30 5 Al 13 26.98 2 Si 14 28.08 6 P 15 30.97 4 S 16 32.06 6 Cl 17 35.45 3 Ar 18 39.94 8 K 19 39.09 8 Ca 20 40.07 8 Sc 21 44.95 6 Ti 22 47.86 7 V 23 50.94 2 Cr 24 51.99 6 Mn 25 54.93 8 Fe 26 55.84 5 Co 27 58.93 3 Ni 28 58.69 3 Cu 29 63.54 6 Zn 30 65.39 Ga 31 69.72 3 Ge 32 72.61 As 33 74.92 2 Se 34 78.96 Br 35 79.90 4 Kr 36 83.80 Rb 37 85.46 8 Sr 38 87.62 Y 39 88.90 6 Zr 40 91.22 4 Nb 41 92.90 6 Mo 42 95.94 Tc 43 97.90 7 Ru 44 101.0 7 Rh 45 102.9 1 Pd 46 106.4 2 Ag 47 107.8 7 Cd 48 112.4 1 In 49 114.8 2 Sn 50 118.7 1 Sb 51 121.7 6 Te 52 127.6 0 I 53 126.9 0 Xe 54 131.2 9 Cs 55 132.9 1 Ba 56 137.3 3 La 57 138.9 1 Ce 58 140.1 2 Pr 59 140.9 1 Nd 60 144.2 4 Pm 61 144.9 1 Sm 62 150.3 6 Eu 63 151.9 6 Gd 64 157.2 5 Tb 65 158.9 3 Tl 81 204.3 8 Pb 82 207.2 Bi 83 208.9 8 Po 84 208.9 8 At 85 209.9 9 Rn 86 222.0 2 Fr 87 223.0 2 Ra 88 226.0 3 Ac 89 227.0 3 Th 90 232.0 4 Pa 91 231.0 4 U 92 238.0 3 Np 93 237.0 5 Pu 94 244.0 6 Chem 161-2010 Lecture 5 Element Atomic No. Atomic Weight 4
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BALANCING CHEMICAL EQUATIONS Hill & Petrucci CHAPTER 3 - STOICHIOMETRY BALANCING CHEMICAL REACTIONS ET: A chemical equation is based on experiments. Reactants is the starting substances in a reaction, and appear on the left side of the chemical equation. Products is the substances formed in a reaction, and appear on the right side of the chemical equation.
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