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Equilibrium Ice Table Practice with Answers.pdf

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Unformatted text preview: Equilibrium Practice Worksheet #1 Solve the following problems using the ICE method. 1. Carbonyl bromide, COBrg, decomposes to CO and Brg at 73°C. If you begin with 0.10 moles of COBrg in a 2.5 Liter flask and find that there are 0.015 moles of COBrg at equilibrium, calculate the equilibrium concentrations of the products. What is Kc forthls reaction? Is this reaction reactant-favored or product—favored at equilibrium? coar2 (9): co (9) + Brzigl 2. Hydrogen fluoride gas can be formed from hydrogen and fluorine gases according to the balanced equation shown below. At a specific temperature, the equilibrium constant Kp forthis reaction is 37.6. What are the partial pressures of all of the gases at equilibrium when the initial partiai pressures of hydrogen gas and fluorine gas are 0.600 atm? Hzie) + F2 (9) “ZHF (g) 3. Cyclohexane, C5H12, can isomerize (change into a compound of the same formula but different structure) to form methylcyclopentane, 05HQCH3. The equilibrium constant is 0.12 at 25°C. if the initial concentration of cyclohexane is 0.016 M, what are the concentrations of each gas at equilibrium? .5. CEH12(g).§- CSHBCH3 (9) 4. Nitrogen gas reacts with oxygen gas at high temperature to make nitrogen oxides This Is a major source of air pollution from auto exhaust. At 1500 K, the equilibrium constant forthe formation of nitrogen monoxide from its elements is 1. 0 x 10‘5. Calculate the equilibrium concentration of NO when the initial concentration of N215 0.60 M and 02' Is 0.30 M. Nzlg) + 02(9)?- AZNOLCJ) 5. The equilibrium constant, Kc, for the following reaction is 5.9 x 10‘3 at 250°C. Suppose'0.17 moles of N204(g) is placed in a 5.00 L flask. What is-the equilibrium concentration of N02(g)? Note: solve for x using the approximation method and then check to see if it is a valid approximation. “1204(9); 2 Noxg) Amen: =0. I? H I Eccfl: Esra: afloscma Fig: 31:0 mam LLENO] go ‘i "‘0'” Pas: 0.10m.“ 5-EN°;1= plan radiant-Gemini 3. Ecru”: = 0. (3qu ECsHeICllfl= 0.00I4H Equilibrium Practice z 11. At 25‘5. the value of Kn for the following reaction is 02. 3o [Q‘h‘ ans 1 I Ifllgl + Clam; m"— Zlleg] 0.03 mol of Ifllsl and 0.03 mol of Clgfg] are placed in a 10 L container .- I110 at 25°C. What are the concentrations of the three gases at equilibrium? l‘ ‘ E13] - 0 ' Ols ...._' 2 [CIA L 12. At a certain temperature. K = 4.0 for the following reaction. C 1C‘1 g: 0 I 2HFIs) '1': Hziel 'i' Fatal - ‘35 m A 1.0 L reaction vessel contained 0.045 mol of Fem.) at equilibrium. | Z . L What was the initial amount of HF in the reaction vessel? n “I: O l ‘ 15 m ‘ = . a i I i i i x9. chemist was studying the following reaction. I scam, + Noam) .—; No.3] + some, i In a 1.0 L container. the chemist added 1.7 x 10'1 mol of 5035] to 1.1 x 10"1 mol of N033]. The value of K; for the reaction at a certain temperature is 4.3. What is the equilibrium concentration of 503m] at this temperature? “'1. [0004.1 = 0.002591! L. CCOZ = 8 .5 x to'3moi n, [02% 0-0H6mollt. 14. Phosgene. EQUINE). is an extremely toxic gas. It was used during World War I. Today it is used to manufacture pesticides. pharmaceuti— calds. rates, and polymers. It is prepared by mixing carbon monoxide l 6 f“. _‘ an c orine gas. 1 " - _ , ' 2. " Br —3- X 0 Golgi + Clgfg; -.-—‘—- CDClgm} I E 1:1 1 ( LIE-l m». L ' CHECK = 0-0415 met 7.: 0.055 mol of (30(3) and 0.072 mol of Clam] are placed in a 5.0 L container. At 870 K. the equilibrium constant is 0.2.0. What are the equilibrium concentrations of the mixtme at 070 KT 62 \ . [Col :3" l 1 -— 1 Eq ’5‘} . z -- - Ar 15. Hydrogen bromide decomposes at 700 K. 92, ZHBrfg) *T—L Ham + Brag} K;- = 4.2. x 10‘.3 ‘- 0.090 mol of HE: is placed in a 2.0 L reaction vessel and heated to 700 K. What is the equilibrium concentration of each gas? 3‘2 . URL] = 0 015' I i—In 21. The following equation represents the equilibrium reaction for the ‘ L... dissociation of phosgene gas. as CUClgm] 1'“— CDm] + Clglg] n At 100‘C, the value of K: for this reaction is 2.2. x 10'". 'il‘he initial NUS "'.'-'- I . lxlD-‘I Mb! concentration of 0001343] in a closed container at 100T] 15 1.5 mollL. What are the equilibrium concentrations of COM and Glam)? 2?. Hydrogen sulfide is a poisonous gas with a characteristic, pffensive a q I m0] = I. I b ado": I odour. It dissociates at 1400'0. with If: equal to 2.4 x 10“. "‘9 Haste T“: was! + 521s} ' . _ L 4.0 mol oft-125 is placed in a 3.0 1.. container. What is the equilibrium concentration oil-134g] at 1400'C? 23. At a certain temperature, the value of K: for the following reaction is 3.3 x 10"”. ZNClahfl '+—- Ng‘g} + 3mm“ A certain amount of nitrogen trichloride. NEIL-Hg), is put in a 1.0 L reaction vessel at this temperature. At equilibrium. 4.0 x 10'“ mol of N213: is present. What amount of NCIgm was put in the reacoon vessel? 24. At a certain temperature. the value of Kn for the following reaction is 4.2 x 10-“. Nate + Dfilgi at ZNUeI 0.45 mol of Nam) and 0.25 mol of 020:] are put in a {5.0 L reaction vessel. What is the equilibrium concentration of NDlg} at this temperature? Equilibrium Problem Set 9“ Toiig‘i'i 'PfDlOle—MS. When hydrogen reacts with fluorine, hydrogen fluoride is formed according to the following equafion: “2(9) + ing) <--—> 2 HFig) The equilibrium constant, K, is 1.15 x 102 at SATP. Calculate the concentrations of all entities at equilibrium if 4.00 mol of H39), 400 mol of 132(5), and 6.00 mol of HFm) are initially placed in a 2.00 L vessel. Fl 1 [:sz -; [$13 =O|55moi IL [HF] =33 Moi /L. At a certain temperature, K for the following equation is 4.0 x 10‘5. Nitrogen trichloride breaks down to make nitrogen gas and chiorine gas. ZNCIEGI) <“-> Nzig) + 3012(9) A certain amount of nitrogen trichloride is placed in a 2.5 L reaction vessel. At equilibrium, 6.2 x 10'5 mol of N39) is present. What was the original concentration of NCI3(Q) in the reaction vessel? H: 9,69 xio'smoi/L Given the following equilibrium system, where K3,; = 12.5 at 60°C, and initially 2.0 mol PClsig) were placed in a 1.0L reaction vessel. ' PCISis) <---> PCI3(9) + C'Zig) Calculate the concentrations of all components when the system reaches equilibrium. Pi: Ems]: (0173:1045moi/L E’Pcrsiiroasi‘nd/L ...
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