HW 4 Hints - CHM 2046 HOMEWORK 4 Name V SEC TA 1. Given...

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Unformatted text preview: CHM 2046 HOMEWORK 4 Name V SEC TA 1. Given these equilibrium constant values, 2N2(g) + 02(9) 2 2N20(g), Kp = 1.2 x 10‘35 N2(g) + 202(9) 2 2N02(g), Kp = 1.7 x 10—17 2N20(g) + 302(g) Z 2N204(g), Kp = 1.6 x 105 calculate Kp for this reaction: 2. Give the net ionic equation for the principal (large shift) reaction, if any, occurring when the following are mixed. NAR = no appreciable reaction is a possible answer. (a) NH4Ac(aq) + HCl(aq) _ _.._*Tkm,kx .1911... (b) NH4F(§.) + HC1(Iaq) (c) (NH4)ZSO4(aq) + H2.(;.'O3(aq) L / ' R (d) st(aq) + NH3(aq) (excess) 3" TL? wk ' (e) H3PQ4(aq) + NH3(aq) (excess) Q + ' (awful/y 4-- n - n I. V (f) H3PO4(aq) (excess) + NH3[aq) ‘ . 3. What is the pH Of 0.03 M H2CO3? 50‘] i i 4. Coca Cola has a rather low lely see what acids are present. Compare t ese Wit your Asa/u :5 H: {:3}; {a 5ft: (ale, What is the strongest cid present? 0 O V ' AMWW 05 ,L' "in?" fit Owl-(II; irrWhat otheggagidggz are present? 5. Based on information in the Acid Base Handout, rank each of these sets in order of increasing pH: (assume 0.1 M aq solutions) m lowest pH —-> highest pH (a) NH4C1, NaAc, NaCl (b) NaCN, Na2CO3, Na2803 (c) NH4NO3, NaHSO4, KHso3 (d) K20, $03, 802, C02 (add these to water and see what you get). 6. Glycine is sometimes represented as NHZ—CHZ—COOH but actually exists in water at neutral pH as the zwitterion, as dicussed in class. At low pH, the zwitterion reacts to form its conjugate acid. At high pH the zwiterion reacts to form its conjugate base. Show the structure of each form and indicate the total charge. Hint: just add or remove a proton (to or from where?). Low pH Neutral pH High pH Additional Chapter 18 problems: 83, 84. ...
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This note was uploaded on 02/14/2012 for the course CHM 2046 taught by Professor Veige/martin during the Spring '07 term at University of Florida.

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HW 4 Hints - CHM 2046 HOMEWORK 4 Name V SEC TA 1. Given...

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