{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

chem142_ch6-7_suppl_pkt-key

chem142_ch6-7_suppl_pkt-key - Cum W2 oL-La—Gl Suflw...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

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

View Full Document Right Arrow Icon
Background image of page 2
Background image of page 3

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

View Full Document Right Arrow Icon
Background image of page 4
Background image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Cum W2:- oL-La—Gl Suflw ”Mar ,.. pal .. (9.3.5 1?. (10) Calculate the pH of a solution made by adding 3'! .00 ml of a 1.50 M solution of hypochlorous acid (K3 : 3.5 x 103) to 700.00 ml of pure water. \DMW '— MIV‘ 2'“le (“MAUREEN MLCHLQ STA (LEW-3:) 7. M1... WanteH—a’a Owl-1:3) my.) Kama; : (asxw‘b) (mm :33 7; 5—.IB+KIQ_S “:3 pH = 453(EJNHJT) =1 4-10 g 19. (10) Calculate the 131-1 and concentra‘jons of all spacics in a 0.100 M solution of benzoic acid (CqHéOg, K3 :- 65 x 10'5). H + _ H CTHSOLH 7;: H J" CNS-01 Wail}: mil-l 53.) [—H4—E 2 [CTHSOZ-j "1 \) REP-R1,: :- JLLSMD'5)(-\°°“‘) — 2.:s-yao'2" m [Haw-:01? : [Hi]: —><' : («my (gnaw-:3) = .o‘nse PH: 4&3 (2.w>n51’) = 2.2;‘1 a what is the pH oi a 0.050 M LiOH solution? {DH—11-03% T t: (€3.54: $.30 _ 7, .970 fH The substance CatOH}; is considered a weak Arrhenius acid a weak Arrhenius base a strong Arrhenius acid a strong Arrhenius base 9:", I31 frrl u" 6 A solution is prepared by adding 0.10 mol of iron{IlI) nitrate, FelNOB}, to 1.00 L of water. which statement about the solution is correct? A. The solution is basic. The solution is neutral. The solution is acidic. C D The values for K, and Kr for the species in solution must be known before a prediction can he made. 1. thch of the following substances will give an aqueous solution of pH Closest to 7? { A.) KNOE B. C02 C. NHiI u. NE) E. CHJNu-J 12 erLE the mass—action expre55ion. 0c , for the following chemical reaction. Psz) + C019) 7: pbu) a cozig) ICOEI [CO] le1 ICOZ] [Pb] [CO2] ® [C0] 8 {C03} C_ [Pbol [CO] D_ [COT 1 10 0 mL of a 0.100 mo] L” 501 mL 0! a 0.100 mol L” solu:iun cf a esLablished- tion of a metal ion M“ is mixed with 10.0 ubstance L. The following equ111br1um is {DC ME‘iaq] + 2L{aq} :2: ML22+(ag) At equlllbrlum the concentration of L is found to be D.C1uo mol L”. whet i5 the equ111brium concentration of MLJ', in moi L]? N 2+ 3‘ .H 0.100 M 4' 1"" “r ML'l’ (“Ne "rode I [email protected] L '6. 0.050 ‘ T511“. —~ - I M ImuJ. 6' (g g Q ca 0 0:25 " M (Q / 15‘ CE) 0 0200 £1 —.J.-n~l —-E>w*-€ *-'l'“"'“ // E 0 010U _ e. .(a'twvw? Hum-d Hf: (Z: W fffH—h- “a“ -. ‘b ._§__E4 ‘3 H 'V’F , 1* \\ - -; -' 01 444% 3 10 L‘ 1a b - _.___________________,_/‘ 2. The following reaction is at equilibrium at a pressure of 1 atm. in a ClOEEd container. _ __i a t), A mews) 4 COgflg) i.— NaHC’O3ts) +15 (m < m \ -\¢1~Mi PCoze‘lffl' Qxdlrkrmn which, if any, of the following actions will decrease the concentration of C07 gas present at equilibrium? \“ SSH m +o+a r514 A Adding N2 gas to double the pressure E Adding more solid NaOH c_ Increasing the volume of the container Lower ing the temperature E None of the above 14. which one of the following pairs is not a conjugate acid—base pair? A. ago/014‘ a. meg/nor c. 0H'/o" D. H2P04'/HFO.2' ® HCl/H‘ 15. What is the value of Kb for the formate anion. HCDO'? K Hcoom = 2.1 x 10" i ’l K Hun“! —n Ktrcm = Lkflgxm A. 2 1 x 10" ‘0 La 211x61 B. E. 9 x 10“ ® 4 a x 10'“ D. 2 1 x 10"“ L‘hemlsrry 142 B Name __ __Sctti0u Nu. Finallr|al finnuuuilflfil B . The equilibrium constant, KP , has a value of 6.5 x 10'4 at 308 K for the reaction of chlorine with nitric oxide. 10. ll 4 (312(9) : 2NOCl(gl AflSL): lr5=(—‘\ m5“ is the value of KC? K? : Kc (KT‘) 2 5 x in” -‘ 6 5 x 10? £3-5Klb‘4 .‘2 KC, (CO?JDE\)( Saab.» 1.5 X 101 1.7 (.onL®S-»(é§xlg% : Kc. Luna" 2 KC when a chemical system is at equilibrium, the concentrations of the reactants are equal to the concentrations of the products. the concentrations of the reactants and products have reached constant values. the forward and reverse reactions have stopped. the reaction quotient, Q, has reached a maximum. The reaction system poc13tg} ...—_- poclig) + C1219) is at equilibrium. which of the following statements describes the behavior of the system it the partial pressure of chlorine is reduced by 50%? Q E. C. D. POCl, will be consumed as equilibrium is established. POCl will be consumed as equilibrium is established. Chlorine will be consumed as equilibrium is established. The partial pressure of POCl will decrease while the partial pressure of C1; increases as equilibrium is established. Chemistry 142 8 Name _Secljon No. Final Trial. Autumn 2002 20. About half of the sodium carbonate produced is used in making glass products because it lowers the melting point of sand, the major component of glass. I«men sodium carbonate is added to water it hydrolyses according to the following reactions. CO32'(aq) + 1420(1) :_'- HCO3—{aq} + OH-(aq) K1 HCO3‘(aq) + H20{l} __—_-__ H2CO3(aq) + OH"{aq) K2 These can be combined to yield C032‘(aq) + 22-12mm : H2CO3(aq) + 20H'(ag) K3 what is the value of K3? le K: E. C. D K1 / K2 21. Write the mass—action expression. GP, for the following reaction. SbF5(9} + 4012 (g) SbC13 (g) + schig) (PC\2}1(PSbFS) {Psbcllll MPH?) A. (P0214 '?{Psb?3) B. (PshclBJ “Pen-d5 (P511213) H9511?) c. {1002} ?(PSbF5) “95:31:13) ?(F’C1F}S ® (9212? ?{PSbF5) 22. A 0.050 M solution of the weak acid HA has [1130‘] = 3.77 x 10" M. What is the Ki for the acid? A. 7.5:: 10'3M '- __ f 2.3 x 10"" M LH‘Q“ [(110093) c. 7.0x 10"?! D. 2.5 x 10'” M L (37756?) : F15.“ @é‘v) Lh’to’b 1 ...
View Full Document

{[ snackBarMessage ]}