Chemical_Bonding_Sample_Exam[1] - §ample Exam on Chemical...

Info icon This preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: §ample Exam on Chemical Bonding Part Itlf the compound is “Ionic”, put an “I”, then give ionic formula; if its “Covalent”, put a “C” then give structural formulagif its “Metallic”, put an “M”, then write electron sea. #1) a) Nickel M eiectmn egg 13) C52 _C__ A ‘3 : C‘S 0) Br2_C___ M— ango 1 5310‘? e) 133C]; 1 . figs? ons g 95—? H H H l - - g) C3H3 _Q__ 3% h) SI'3N2___1_ 35315323 i) CZHF Q 515:ng H H H Part II: Using the list above, put in proper blanks below: #2) More soluble More soluble Not soluble Good electrolyte Conducts as in water in CCl4 in either solution a solid CAMP S 53 Egg) bi; Mme) mg (1 mg #3) Put a plus (+) if it mixes and a minus (-) if it does not mix: letters b & c + letters b & e + letters g & b 4' letters f & i ‘ letters d & f - letters b & f + —_ . 50‘; (5a 'Nif #4) Give Lewis Dot representation for “e” \L’Cl #5) Give Lewis Dot, bond angle, & bond angle structure for: M‘ u y) $.56 13% fl 4 / \ a)?! thi D C H/?\$/?\H_ gHiiw— W5 H g l» H u H l) B SEED? Wuhan“ - , vF #6) Label whether these are polar or nonpolar: ' f)_¥lm_pn\_cfl______.— g)___hlmtlemr____ Dim—— q) E X A salt with a Hydration Energy of -8kJ/mole and a Lattice Energy of +2kJ/mole /would produce heat (exothermic) when dissolved in water y )/7 r) _L7_ Heating a metal and letting it cool slowly is called tempering ? I i/ S) T ,. metals would rather be oxidized than reduced 19/ b t) _____E___\—1 When a different element (usually a metal) is added to a pure metal, the process is known as tempering.~T\ , u) I \/ metals would rather be a reducing agent than an oxidizing agent“? *'“ :. ’v ’ v) I J The bond energy for N2 would be higher than the bond energy for H2 I w) I Vi L“ 02 has a shorter bond length than N; f/ x) E . Molecules may never violate the octet rule T ,3 y) E \/ The ammonia molecule (NH3) has 2 pairs (4) of unshared electrons f; y z) I Y» In the ammonium ion (NH4+1), all four bonds are of the same length gven though / one is a coordinant bond. f/ aa) I a C2H2 contains 3 sigma & 2 pi bonds 7' bb) I One would expect KF to be a hard, crystalline solid with a high melting point I cc) I The octet rule is violated in SF6 f / dd) E Both NF3 and BF3 are pyramidal structures / : ee) E] LiCl would be soluble in water and is nonconductiv¥/ fl) l: J 7 Surface tension is decreased when Hydrogen Bonding exists TN gg) I J Diamonds and graphite are allotropes of each othergf hh) x / An excellent way of showing whether a substance [yaks up into ions when 1‘ dissolved in water is to do a conductivity test 7’ ii) PH3 has nonpolar bonds, but is a polar moleculef’cw ll) Whenever we write two structures for a molecule & say it is an average because the bonds do not fit in a specific category due to changing positions of electrons, we call this Resonance I k/ #7) Describe the shape of these molecules: a) ($12; Emma b) 514 S might a c) XeI4 mm: mm; d) F2CS iftcdgml hm e) IF3 I“ mng, f) 12 P_a_______rt 11: Circle t e one with the My melting point: i J Ne [email protected]® W or CF4 )C2H4‘orw -fig @or CCI4 4R1) @[email protected] oNaCI or M) or C5Hm h) CCL, or. ) CH4 [email protected] Par____t__ III: True or False (Do you know why they are true or f.alse????) . a) E :1 C02 and F20 are both nonpolar molecules b) E / Nonpolar bonds always mean a nonpolar molecule c) E \/ Ionic compounds are more soluble in nonpolar solvent§< d) l J London is a type of Van der Waals force that is present in all covalently bonded molecules. T e) Dipole-dipole is a type of Van der Waals force present in all covalently bonded molecules. fl f) E .. The covalengond is usually found between metals 2 g) I \/ A type of network solid is a diamond T T i) l X CH30CH3 can form Hydrogen Bonds g h) I j CH30H can form Hydrogen Bonds j) F J CH212 can form Hydrogen Bonds F k) i \/ HF is more polar than HCl \ . l) I Na+1 is a smaller ion and less reactive than Na0 atom F m) T “I Cl"1 is a larger ion and less reactive than the Cl0 atom/r n) E ; CF4 is more polar than CF3H ’3' o) F ?4 g Hybridization is a way that atoms produce more bonds around themselves I“ ~_/\ p) Network solids generally are easy to melt é Answers to sample exam Part I: #1) a) M, electron sea b) C, s=c=s c) C, Br-Br d) I, K2+10‘2 e) 1, Ba+ZC12'1, t) c , F-S-F g) C h) 1, Sam's, i) c, ITIII III . H—CEC—F H'i‘?“i'H H H H #2) More soluble More soluble Not soluble Good electrolyte Conducts as in water in CCl4 in either solution a solid d,e,f,h,i, b, c, g a d, e, h a #3 (+)mix (-) not mix (+)mix (+) mix; (+) mix (-) not mix #4) .. Ba+2 :Clzz'1 : F : S : F: <109.5° g) H H H H:C: C:C:H all 109.50 HHH i) H:C:::C:F: all 1800 H- EC-F #6 f = polar g = nonpolar i = polar #7) a) Tetrahedral b) See—saw 0) square planar Id) equalateral (trigonal planar) e) T-shaped 1) linear ' Part II: a)Kr b) CaO ‘ c) C6H12 d) Ni e) Fe f)Ca0 g) diamond h) C14 01120 PartIII: a)Fb)F c)Fd)T e)F 1)]? g)T h)Ti)F j)Fk)T 1)T m)T n)F0)T p)F q)Tr)F s)T t)F u)T V)T W)F X)F y)F Z)T aa)T bb)T cc)T dd)F ee)F ff)F gg)T hh)T ii)T jj)T ' Part IV: a) +6 b) -2 c) +2 d) +6 e) +1 n+3 Part V: .. +2 . '3 Bag+2 sz'3 Ba #4:. N: .. “7 °. ‘3 B .//?N: Ba3+2N2'3 +2 ' Ba. BasNz Part VI: _S_y_l_)__(_)_gr_. M. Ox. Agent Red. Agent Total e' transferred Zn" H+1 flCl , Zn 2 s+4 Mn+7 KMnm stn3 6 Cl'1 Mn+7 KM_n_O4 HCl 10 Part VII: a)D b)A c)C d)B e)B Part VIII: 3) Yes b) No c) No d) No e) Yes 1) Yes g) No h) Yes Part IX: NF3 pyramidal sp3 polar OF; angular sp3 polar . B13 equalateral (trigonal planar) sp2 nonpolar TeF4 See-saw sp3d polar Ast trigonal bipyramidal sp3d nonpolar‘ Ker linear sp3d non olar mm square planar sp d2 nonpolar SeF6 octahedral sp3d2 nonpolar IF3 T-shaped sp3d polar (slightly) 2) this a art of the molecule is linear, 180°, sp hybridization this part of the molecule is tetrahedral, 109.50 sp3 hybridization * the carbons in this part are at 120° angles/equalteral (or trigonal planar) & sp2 hybridization ...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern