chem cheat sheet - 3 , calculate the value of K eq if the...

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∆E rxn =E products -E reactants ; Reaction rate-k[concentration] Ex) What is order of reaction k[A][B] 3 with respect to A,B, and overall? Ans) A=1, B=3, overall= 4 Ex) A kinetics experiment on reaction bB+cC→dD yielded data shown below. Exp [B] [C] Rate m/sec of D form a.) Write general rate law 1 .1 .1 .032 b.) Which two expts. would you compare to 2 .1 .2 .128 determine B, C? 3 .2 .1 .064 c.) What are exponents of B and C? d.) Write experimentally determined rate law. Ans) a.) k[B] 3 [C] y b.) Consider two expts. where [B] is changing but [C] remains the same. This is expts 1 and 3. C is 1 and 2. c.) In expts. 1 and 3, we find that doubling concentration of B doubles reaction, thus exponent B is 1. In C, it is 2. d.) k[B][C] 2 Ex) For the reaction N 2 +3H 2 ↔2NH
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Unformatted text preview: 3 , calculate the value of K eq if the following concentration are present at equilibrium: [N 2 ]=.22M; [H 2 ]=.14M; [NH 3 ]=.055M Ans) K eq =[NH 3 ] 2 (.055) 2 [N 2 ] [H 2 ]= (.22)(.14) 3 = 5 Ex) Write the K eq expression for the following reaction: a) SnO 2 (s)+2CO(g)Sn(s)+2CO 2 (g) b) Ti(s) +2Cl 2 (g)TiCl 4 (l). Ans) a) K eq [CO 2 ] 2 /[CO] 2 b) K eq 1/[Cl 2 ] 2 Reaction Order= 0= no change; 1=doubles; 2=quadruples; 3= 8x; Dissociation of water= K w 2H 2 O(l)H 3 O + +OH-H 2 O H + +OH-H 2 OH + +OH-K eq = [H + ][OH-]/ [H 2 O] K w =[H][OH-]=10-14 M=K eq x H 2 O Buffers : Solution that resists change to pH. To make buffer, combine weak acid w/conjugant base....
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This note was uploaded on 02/20/2008 for the course CHEM 1560 taught by Professor Baird, b during the Fall '07 term at Cornell University (Engineering School).

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