Exam2 answers - E S C hem.1 310 pring2007 xam2 T estF orm A...

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Chem. 1310 Spring2007 Exam 2 Test Form A Each question worth 5.5 points F \ r Which of the following series is isoelectronic? isoelectronic?z i r,. '"t'//"';:/' 5{'/ -{ / t' / / 2p [--F-Tt A) Sn, As, S, F B) B.C.N.O rca)s'-. cl-.'K*. ca2* \f F-, cr-, K*, Rb* E) Na, K, Rb, Cs 2. The hydrogen sulfate or bisulfate ion HSO4- can act as either an acid or a base in water solution. In which of the following equations does HSOa- act as an acid? A) HSO4- + H3O* -+ SO: + ZHzO -+r @ HSo+ + H2o So+2- + H3o* C) HSOa- + HzO HzSOa + OH D) HSO+- OH- + HzSO+ 02 3. Nitrogen has 5 valence electrons. Consider the following electron anangements. Which represents the ground state for the N._ ion? 2s u tl [] M E b) c) (-, I /SOl 4. Which of the following represents a conjugate acid-base pair? - A) HSOa- and SOr2- B) HCI and NaOH C) H2POa- and POa3- 5) HNo: and No:- \--Z LAaf tnnT [-Ap-7 Ln4 qE' \l/ Page 2 of8
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EA Chem. 1310 Spring2007 Exam 2 Test Form A iF --. 5. Th{valencelelectron configuration for S is -ALWp4 (+j' ',i1)ljro,r*',^ D) 4s24p4 6. For the elements Cs, F, and Cl, the order of increasing electronegativity is: ADcs<cl<F *Tf r<cs<cl C) F<ClcCs D) ClcCs<F 7. The pH of a 0.100 M solution of an aqueous weak acid (HA) is 3.20. The K. for the )|L is: r IJ n .+ l/- ^ A\ ?) | rfls 4o + /4so+ t'r4 A\ 7) \ tr., .o-- .,)Y .t)+ J'- I @4.oxlo6 \f O./oo 4/O d C) 6.3 x l0* 7.2xto-s 'C + *+ + PH=?z'
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Exam2 answers - E S C hem.1 310 pring2007 xam2 T estF orm A...

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