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Chem107 Test 2 cheat

by: Lauren Notetaker

Chem107 Test 2 cheat CHEM 107

Lauren Notetaker

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Bring this to test w/ you. Dr. Little allows 1 page of notes on test days. This has all important info
Georgina Little Staff
Study Guide
CHEM 107, selu, SLU, Chemistry, Dr. Little
50 ?





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This 1 page Study Guide was uploaded by Lauren Notetaker on Thursday January 28, 2016. The Study Guide belongs to CHEM 107 at Southeastern Louisiana University taught by Georgina Little Staff in Fall 2015. Since its upload, it has received 53 views. For similar materials see SURVEY OF CHEMISTRY in Chemistry at Southeastern Louisiana University.


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Date Created: 01/28/16
comp: 2+ elements bound chem together naming ionic compounds acids/name of acid/anion Grams of NO can be produced from 156g of CH 5? 1.)molecular comp: elements held Separate formula into +&- parts; if>2, have to find the polyatomic grouping HCl (hydrochloric acid) Cl- 156g CH5N x 1 mole CH5N x 4 moles NO x 30.01 g NO together w/ covalent bond with + part {first} with the - part {first} HBr (hydrobromic acid) Br- 31.07 G ch5n 4 moles CH5N 1 mole NO 2.)ionic comp: set of +&- ions held Is it just 1 element or a bunch? Is it just 1 element or a bunch? HNO (3irtric acid) NO - 3 = 151 g NO together by electrostatic attraction (1):does given TMI chart (bunch):use (1):use name (bunch):use HNO (ni2rous acid) NO - 2 4CH5N+ 9O2---> 4CO + 10H2O + 4NO (balanced rxn) list 2+ charges name on PI element; change name on PI H SO (sulfuric acid) SO 2- How many moles in 111.6 g of FeO 2 4 2- 4 bond: h+&e- are attracted to each other (YES): figure out charge table (given) ending to -ide table (given) H 2O (3ulfurous acid) SO 3 111.6 g FeO x 1 mole FeO= 1.553 moles FeO & that attraction holds atom together of the +ion*,then use H 2O (3arbonic acid) CO 3- 71.85 g FeO - *2 INTERatom attractions: element name followed how to fig out + ion charge: look up charge of HC 2 O3(2cetic acid) C H 2 3 2 1.) h+ in A for ve- in B by charge of +ion, in - ion, multiply it by the subscript of the - part, H3PO 4phosphoric acid)PO 4- 2.) ve- in A for h+ in B roman numbers, in () change sign to +, then ÷ by the + part subscript H 3O 3phosphorous acid) PO 33- (NO): use element name *make sure formula is an IC(metal+nonm or PI) HClO (3hloric acid) ClO -3 bonding: h+ of 1atom attract e- of another HClO 2chlorous acid) ClO - 2 A. 2 possibilities: naming ionic chemical formulas writing ionic formulas {copper (II) sulfate)= CuSO 4 1.)atom A's h+ STRONGLY attract atom B's e-, cation name: anion name: 1.)confirm it's ionic: check for metal or Al ion at but atom B's h+ WEAKLY attract atom A's e- 1.)single element w/ 1.)single element beginning of name (copper is a metal) -A "wins" and pulls away from atom B 1 possible ion charge *name of element 2.)write element symbol of cation; polyatomic: get -A becomes anion A; B becomes cation B *name of element w/ end change to formula from table & put (); acids have H+ cation {Cu} *this is called IONIC bonding 2.)single element w/ -ide 3.)temp: write charge of cation after its symbol (from 2.)atom A's h+ STRONGLY attract atom B's e-, 2+ ion charge 2.)several elements group, ion table, or roman numeral in name) {Cu } 2+ & atom B's h+ STRONGLY attract atom A's e- *name of element w/ *name of PI (chart 4.)write symbol of anion; if polyatomic see #2; for poly -neither "wins"; instead e- are pulled toward charge in roman numeral acids, use ending of first word to know the polya anion: the area between the atoms afterwards AlN: aluminum nitride ous=ite ion&ic=ate ion) {SO } 4 *this shared pair of e- is a COVALENT bond 3.)several elements NH Cl4 ammonium chloride 5.)same as #3 B. strength of atom's h+ attraction for another *name of PI from CuSO : copper (II) sulfate 6.)use math/crisscross to find subscripts {2,2=1,1 redu} 4 atom's e- is related to electroneg&valence chart 7.)hydrate: draw center dot, write #of the Greek prefix, *↓ve-&↓en=h+ has weak attraction for extra e- ionic compound formulas and then write H O2- rewrite formula w/o temp chg&() ~METALS~ Separate name into +(includes roman numerals )& - part *↑ve-&↑en=h+ has strong attraction for extra e- with +part 1{first} with - part {first} ~NONMETALS~ is it just 1 element or a bunch? is it just 1 element or a bunch? C. covalent vs ionic (1):does given TMI (bunch):find on (1):ignore -ide; figure (bunch):find on -metal&nonmetal-weak:strong attraction (I) chart list 2+ charges? PI table & write out element & write PI table & write -non&non-strong:strong attraction (C) (YES):write element symbol formula in () its chemical symbol; formula in () & & symbol & charge in & the charge use group to find & the charge ↓valence metals lose their valence e- roman numerals write its charge -group 1 elements form 1+ cations (NO):write element symbol -group 2 elements form 2+ cations; G13=+3 & use group or table to find writing covalent formulas ↑v nonm gain enough e- to make 8 v e- its charge 1.)make sure it's a cov comp: look for nonmetal at beginning -group 17 nonm form 1- anions 2.)find element name in 1st element & write symbol -group 16 nonm form 2- anions covalent compounds/molecules 3.)leave space & write symbol found in 2nd word -group 15 nonm form 3- anions *no charged ions 4.)look at prefixes (if none: assume only 1) -group 14 nonm form 4- anions *names INCLUDE subscript info *octet rule: not for metals in group 3-15 *two nonmetals arrangement of atoms in molecule: det. shape, distribution of 1: mono- 6: hexa- CO : ca2bon dioxide e- (polarity), & how it will interact w/ neighbor molecules Hydrogen is TRICKY (NONMETAL) 2: di- 7: hepta- ICl : iodine heptachloride *need structures for covalent molecule ratios 7 -I comp w/ an H+ cation are ACIDS 3: tri- 8: octa- P O2d5phosphorus pentoxide -forms cov bonds when bonds w/ N, 4: tetra- 9: nona Lewis structure (for covalent molecule) (H is never in middle) P, O, S, Cl, Br, I 5: penta- 10: deca *drop vowel from prefix *middle element has fewest valence e- chemical formula: first element: second element diatomic 7: H 2 N 2 O 2 F2, C2 , B2 ,2I = always found in 2's A.) Ca(ClO 3 2 *prefix that matches *prefix that matches POLAR OR NOT? -METALS go first subscript (not mono) subscript -draw lewis structure -1 Ca atom, 2 ClO "3roups" *name of element *name of element -for each bond in structure, determine if bond is polar *2 Cl atoms and 6 O atoms w/ ending: -ide -does the molecule have 1 or more polar bonds? 2+ 1- ( B.) Ca Cl NO): (YES): determine shape: Ca |1||2| polar bonds: NP -is it tetrahedral? 2+=2- *in a cov bond, even though the 2 atoms (NO):is it (YES): central atom C.) Pb O 2- share the e-'s, if they dont have the same EN: trigonal planar? have 4 ID bonds? Pb 2 4 1.) the more EN atom will pull the e- more; it (NO): is it (YES): central (NO): (YES): 8+=8- will have a partial - charge (δ-) linear? atom have P NP PbO 2 2.) the less EN atom -> a partial + charge (δ+) (NO): (YES):central 3ID bonds? D.) ionic comp DON'T show: *difference is EN between 2 atoms: P atom have (NO): (YES): 1.) ion charges (superscript) a.) 0-0.44=NONPOLAR; 0.45-1.7= POLAR COVALENT ID bonds? P NP 2.) subscripts of 1 (assumed) b.) >1.7 (IONIC b/c there is enough diff for one to pull) (NO): (YES): E.) ionic comp DO show: c.) 3.0-2.5=0. --|------> (0.5) δ+ δ- P NP 1.) ↓ set of subscripts possible I---Cl I---Cl polyatomic ions: groupings of nonmetals dipoles/polar molecules combination (synthesis): 2 substances combine to form 1 product that stick together and make an ion *if e- in a molecule aren't evenly decomposition: one reactant is broken into 2 or more products -can form Ionic comp w/ another ion of distributed, one side is δ- and the single replace: element displaces ion in ionic compound opposite charge other is δ+, molecule is polar or dipole double replace: ionic comp displaces ions in another ionic comp -b/c most are -ions, they usually form *to be polar, 2 conditions must be met: combustion: C H +O x-y CO 2H O 2 2 Ionic comp.'s w/ metal cations 1.)molecule must have at least 1 polar bond CONVERSIONS 2.)polar bonds cannot cancel due to geometry *rxn's must conserve matter: can't create/destroy 23 1mole X=6.02x10 particles X {moles-part) a.) linear molecule w/ 2 identical polar bonds atoms; must have same # of atoms before & after 1mole X=[Molar mass] grams X {moles-mass g} b.)trigonal planar molecule w/ 3 identical polar bonds *rxns respect bond rules: can't create CaCl (CaCl ) 2 [subsc] moles X=1 moles X sub {atoms-set atoms} c.)tetrahedral molecule w/ 4 identical polar bonds *some rxn's just don't happen [coeff of X] moles X= [coeff of Y] moles Y {subX-subY} *CO (NPD2G)* 2


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