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Equilibrium Expressions Solutions Library

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Equilibrium Expressions

Q. Match each chemical equation below with the correct equilibrium constant expression.Chemical Equation                                           Equ...

Solved • Mar 20, 2020

Equilibrium Expressions

Q. Complete the Ka1 expression for H2CO3 in an aqueous solution. Ka1 =4.45x10-7=

Solved • Mar 20, 2020

Equilibrium Expressions

Q. The temperature dependence of the equilibrium constant (Kp) is illustrated for the following reaction:NH4ClO4(s) → NH3(g) + HClO4(g)Note: the point...

Solved • Mar 16, 2020

Equilibrium Expressions

Q. Given the reaction2NH3(g) ⇌ N2(g) + 3H2(g)At equilibrium, it was found that the concentration of H2 was 0.0591 M, the concentration of N2 was 0.019...

Solved • Feb 17, 2020

Equilibrium Expressions

Q. What is the Kc equilibrium-constant expression for the following equilibrium?FeO(s) + H2(g) ⇌ Fe(s) + H2O(g)

Solved • Feb 17, 2020

Equilibrium Expressions

Q. A sample of pure NO2 gas heated to 1000 K decomposes: 2NO2(g) ⇌ 2NOg) + O2(g)       Kp = 158Analysis shows that the partial pressure of O2 is 0.25 ...

Solved • Feb 7, 2020

Equilibrium Expressions

Q. The equilibrium constant associated with the reactionCu(OH)2(s) + 2HCl(aq) ⇌ 2H2O(l) + CuCl2(aq) is...E. None of the above

Solved • Feb 4, 2020

Equilibrium Expressions

Q. The equilibrium constant for the gas phase reaction2 NH3 (g) ⇌ N2 (g) + 3 H2 (g)is Ke= 2.30 x 10-5 at 300 °C. Which one of the statements is true a...

Solved • Jan 24, 2020

Equilibrium Expressions

Q. What is the expression for Kp for the reaction below?4 CuO(s) + CH4(g) ⇌ CO2(g) + 4 Cu(s) + 2 H2O(g)

Solved • Jan 24, 2020

Equilibrium Expressions

Q. What is the expression for Kp for the reaction below? 4CuO (s) + CH4 (g) ⇌ CO2 (g) + 4Cu (s) + 2H2O (g). a. Kp = [CuO]4[CH4][CO2][Cu]4[H2O]2b. Kp =...

Solved • Jan 20, 2020

Equilibrium Expressions

Q. The table below lists the equilibrium concentrations for H 2(g), I2(g), and HI(g) in the given reaction.H2 (g) + I2 (g) ⇌ 2HI (g)The equilibrium pa...

Solved • Dec 19, 2019

Equilibrium Expressions

Q. At 700 K, the reaction below has an Kp value of 54. An equilibrium mixture at this temperature was found to contain 0.712 atm of H2 and 2.77 atm of...

Solved • Dec 16, 2019

Equilibrium Expressions

Q. At a certain temperature, Kp for the reaction,Br2(g) <=> 2 Br(g) is 3,498.Calculate the value of Kp for the reaction,1/2 Br2(g) ) <=> B...

Solved • Dec 16, 2019

Equilibrium Expressions

Q. At 700 K, the reaction below has an Kp value of 54. An equilibrium mixture at thistemperature was found to contain 1.49 atm of I2 and 4.08 atm of H...

Solved • Dec 12, 2019

Equilibrium Expressions

Q. At 700 K, the reaction below has a Kp value of 54. An equilibrium mixture at thistemperature was found to contain 1.84 atm of I2 and 4.24 atm of HI...

Solved • Dec 11, 2019

Equilibrium Expressions

Q. Which is the correct Kc expression for the following equilibrium reaction?BaO(s) + CO2(g) ⇌ BaCO3(s)

Solved • Nov 13, 2019

Equilibrium Expressions

Q. Which is the correct Kc expression for the following equilibrium reaction?Pb(NO3)2(aq) ⇌ Pb2+(aq) + 2 NO3–(aq)

Solved • Nov 12, 2019

Equilibrium Expressions

Q. At 500.0 K, 1.0 mole of gaseous ONCl is placed in a 1.0-liter container. At equilibrium, it is 9.0% dissociated according to the equation:2 ONCl(g)...

Solved • Nov 12, 2019

Equilibrium Expressions

Q. The oxidation of sulfur dioxide by oxygen to sulfur trioxide has been implicated as an important step in the formation of acid rain:2 SO2(g) + O2(g...

Solved • Nov 12, 2019

Equilibrium Expressions

Q. At a given temperature, the equilibrium constant (Kp) for the reaction PCl5(g) ↔ PCl3(g) + Cl2(g) is 0.395 {also Kp= Kc(0.0821 T)}. What is the tot...

Solved • Nov 12, 2019

Equilibrium Expressions

Q. Ammonium iodide can dissociate to produce HI and ammonia, NH4I(s) ⇌ NH3(g) + HI(g). At 300 °C, Kp = 0.42. If 250. g of ammonium iodide is placed in...

Solved • Nov 11, 2019

Equilibrium Expressions

Q. For the following reaction, Kp = 8,532 at a given temperature.2 NO(g) + Cl2(g) <=> 2 NOCl(g)At equilibrium, PNO = 0.734 and PCl2 = 0.303. Wha...

Solved • Nov 1, 2019

Equilibrium Expressions

Q. The following diagram represents an equilibrium mixture produced for a reaction of the type A + X .Is K greater or smaller than 1 if the volume is ...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. The following diagram represents a reaction shown going to completion. Each molecule in the diagram represents 0.1 mol, and the volume of the box i...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. The phase diagram for SO2 is shown here.Calculate the equilibrium constant for this reaction at 100 oC.

Solved • Dec 11, 2018

Equilibrium Expressions

Q. The equilibrium2NO (g) + Cl2 (g) 2NOCl (g)is established at 500 K. An equilibrium mixture of the three gases has partial pressures of 9.50×10−2 atm...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. Consider the reaction A(g) ⇌ B(g). The images shown here illustrate equilibrium mixtures of A (red) and g (black) at three different temperatures.A...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. Consider the reaction: A(g) ⇌ 2B(g). The graph plots the concentrations of A and B as a function of time at a constant temperature.What is the equi...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. Diatomic iodine (I2) decomposes at high temperature to form I atoms according to the reaction: I2(g) ⇌ 2I(g), Kc = 0.011 at 1200 oCIn an equilibriu...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. Express the equilibrium constant for the combustion of propane in the balanced chemical equation: C3H8(g) + 5O2(g) ⇌ 3CO2(g) + 4H2O(g)

Solved • Dec 11, 2018

Equilibrium Expressions

Q. Consider the following reaction: H2(g) + I2(g) ⇌ 2HI(g)Complete the following table. Assume that all concentrations are equilibrium concentrations ...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. Consider the following reaction: H2(g) + I2(g) ⇌ 2HI(g)Complete the following table. Assume that all concentrations are equilibrium concentrations ...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. Carbon monoxide replaces oxygen in oxygenated hemoglobin according to the reaction: HbO2(aq) + CO(aq) ⇌ HbCO(aq) + O2(aq)Suppose that an air mixtur...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. Ethene (C2H4) can be halogenated by the following reaction: C2H4(g) + X2(g) ⇌ C2H4X2(g)where X2 can be Cl2 (green), Br2 (brown), or I2 (purple). Ex...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. Consider the reaction: aA(g) ⇌ bB(g)Each of the entries in the following table represents equilibrium partial pressures of A and B under different ...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. What is the correct expression for the equilibrium constant (Kc) for the reaction between carbon and hydrogen gas to form methane shown here?C(s) +...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. A sample of pure NO2 is heated to 337 oC, at which temperature it partially dissociates according to the equation2NO2(g) ⇌ 2NO(g) + O2(g)At equilib...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. Consider the following reaction: CO(g) + 2 H2(g) ⇌ CH3OH(g)An equilibrium mixture of this reaction at a certain temperature was found to have [CO] ...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. Consider the following reaction: NH4HS(s) ⇌ NH3(g) + H2S(g)An equilibrium mixture of this reaction at a certain temperature was found to have [NH3]...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. Consider the reaction: 2 NO(g) + Br2(g) ⇌ 2 NOBr(g); Kp=28.4 at 298 KIn a reaction mixture at equilibrium, the partial pressure of NO is 121 torr a...

Solved • Dec 11, 2018

Equilibrium Expressions

Q. Identify an expression for the equilibrium constant of each of the following chemical equations.SbCl5(g) ⇌ SbCl3(g) + Cl2(g)

Solved • Dec 11, 2018

Equilibrium Expressions

Q. Identify an expression for the equilibrium constant of each of the following chemical equations.2 BrNO(g) ⇌ 2 NO(g) + Br2(g)

Solved • Dec 11, 2018

Equilibrium Expressions

Q. The methane used to obtain H2 for NH3 manufacture is impure and usually contains other hydrocarbons, such as propane, C3H8. Imagine the reaction of...

Solved • Nov 8, 2018

Equilibrium Expressions

Q. The methane used to obtain H2 for NH3 manufacture is impure and usually contains other hydrocarbons, such as propane, C3H8. Imagine the reaction of...

Solved • Nov 8, 2018

Equilibrium Expressions

Q. An engineer examining the oxidation of SO 2 in the manufacture of sulfuric acid determines that Kc = 1.7 x 108 at 600 K: 2SO2(g) + O2(g) ⇌ 2SO3(g) ...

Solved • Nov 8, 2018

Equilibrium Expressions

Q. Glauber’s salt, Na2SO4·10H2O, was used by J. R. Glauber in the 17 th century as a medicinal agent. At 25°C, Kp = 4.08×10−25 for the loss of waters ...

Solved • Nov 8, 2018

Equilibrium Expressions

Q. For the following reaction, Kp = 0.262 at 1000°C: C(s) + 2H2(g) ⥫⥬ CH4(g)At equilibrium, PH2 is 1.22 atm. What is the equilibrium partial pressure ...

Solved • Nov 7, 2018

Equilibrium Expressions

Q. You are a member of a research team of chemists discussing plans for a plant to produce ammonia:   N2(g) + 3H2(g) ⇌ 2NH3(g)(a) The plant will opera...

Solved • Nov 7, 2018

Equilibrium Expressions

Q. The minerals hematite (Fe2O3) and magnetite (Fe3O4) exist in equilibrium with atmospheric oxygen: 4Fe3O4(s) + O2(g) ⇌ 6Fe2O3(s) Kp = 2.5 x 1087 at ...

Solved • Nov 7, 2018

Equilibrium Expressions

Q. A sample of solid ammonium chloride was placed in an evacuated chamber and then heated, causing it to decompose according to the following reaction...

Solved • Nov 5, 2018

Equilibrium Expressions

Q. For the reaction:3O2(g) ⇌ 2O3(g)K = 1.8 x 10 -7 at a certain temperature. If at equilibrium [O 2] = 0.062 M, calculate the equilibrium  O3 concentr...

Solved • Nov 5, 2018

Equilibrium Expressions

Q. The reaction2NO(g) + Br2(g) ⇌ 2NOBr(g)has Kp = 109 at 25ºC. If the equilibrium partial pressure of Br 2 is 0.0159 atm and the equilibrium partial p...

Solved • Nov 4, 2018

Equilibrium Expressions

Q. For the reaction2H2O(g) ⇌ 2H2(g) + O2(g)K = 2.4 x 10 -3 at a given temperature. At equilibrium in a 2.0-L container it is found that [H 2O(g)] = 1....

Solved • Nov 4, 2018

Equilibrium Expressions

Q. Consider the following reaction at a certain temperature:4Fe(s) + 3O2(g) ⇌ 2Fe2O3(s)An equilibrium mixture contains 1.0 mole of Fe, 1.0 x 10-3 mole...

Solved • Nov 4, 2018

Equilibrium Expressions

Q. Write expressions for Kp for the following reactions.b. CO2(g) + MgO(s) ⇌ MgCO3(s)

Solved • Nov 4, 2018

Equilibrium Expressions

Q. Write expressions for Kp for the following reactions.a. 2Fe(s) + 3/2 O2(g)  ⇌ Fe2O3(s)

Solved • Nov 4, 2018

Equilibrium Expressions

Q. Write expressions for K and Kp for the following reactions.d. CuO(s) + H2(g) ⇌ Cu(l) + H2O(g)

Solved • Nov 4, 2018

Equilibrium Expressions

Q. Write expressions for K and Kp for the following reactions.c. 2KClO3(s) ⇌ 2KCl(s) + 3O2(g)

Solved • Nov 4, 2018

Equilibrium Expressions

Q. Write expressions for K and Kp for the following reactions.b. 2NBr3(s) ⇌ N2(g) + 3Br2(g)

Solved • Nov 4, 2018

Equilibrium Expressions

Q. Write expressions for K and Kp for the following reactions.a. 2NH3(g) + CO2(g) ⇌ N2CH4O(s) + H2O(g)

Solved • Nov 4, 2018

Equilibrium Expressions

Q. At a particular temperature, a 3.0-L flask contains 2.4 moles of Cl 2, 1.0 mole of NOCl, and 4.5 x 10 -3 mole of NO. Calculate K at this temperatur...

Solved • Nov 3, 2018

Equilibrium Expressions

Q. For the reaction2NO(g) + 2H2(g) ⇌ N2(g) + 2H2O(g)it is determined that, at equilibrium at a particular temperature, the concentrations are as follo...

Solved • Nov 3, 2018

Equilibrium Expressions

Q. Write the equilibrium expression (Kp) for each of the following gas-phase reactions.d. 2PBr3(g) + 3Cl2(g) ⇌ 2PCl3(g) + 3Br2(g)

Solved • Nov 3, 2018

Equilibrium Expressions

Q. Write the equilibrium expression (Kp) for each of the following gas-phase reactions.c. SiH4(g) + 2Cl2(g) ⇌ SiCl4(g) + 2H2(g)

Solved • Nov 3, 2018

Equilibrium Expressions

Q. Write the equilibrium expression (K) for each of the following gas-phase reactions.c. SiH4(g) + 2Cl2(g) ⇌ SiCl4(g) + 2H2(g)

Solved • Nov 3, 2018

Equilibrium Expressions

Q. Write the equilibrium expression (K) for each of the following gas-phase reactions.a. N2(g) + O2(g)  ⇌  2NO(g)

Solved • Nov 3, 2018

Equilibrium Expressions

Q. The binding of oxygen by hemoglobin (Hb), giving oxyhemoglobin (HbO2), is partially regulated by the concentration of H3O+ and dissolved CO2 in the...

Solved • Nov 1, 2018

Equilibrium Expressions

Q. The equilibrium constant (Kc) for this reaction is 5.0 at a given temperature. CO(g) + H2O(g) ⇌ CO2(g) + H2(g)(a) On analysis, an equilibrium mixtu...

Solved • Nov 1, 2018

Equilibrium Expressions

Q. What is the minimum mass of CaCO 3 required to establish equilibrium at a certain temperature in a 6.50-L container if the equilibrium constant (Kc...

Solved • Nov 1, 2018

Equilibrium Expressions

Q. Butane exists as two isomers, n−butane and isobutane.KP = 2.5 at 25 °CWhat is the pressure of isobutane in a container of the two isomers at equili...

Solved • Nov 1, 2018

Equilibrium Expressions

Q. Calcium chloride 6−hydrate, CaCl2∙6H2O, dehydrates according to the equationCaCl2·6H2O(s) ⇌ CaCl2(s) + 6H2O(g) KP = 5.09 x 10−44 at 25°CWhat is the...

Solved • Nov 1, 2018

Equilibrium Expressions

Q. Sodium sulfate 10−hydrate, Na 2SO4∙10H2O, dehydrates according to the equationNa2SO4·10H2O(s) ⇌ Na2SO4(s) + 10H2O(g)        K P = 4.08 x 10−25 at 2...

Solved • Nov 1, 2018

Equilibrium Expressions

Q. At a temperature of 60 °C, the vapor pressure of water is 0.196 atm. What is the value of the equilibrium constant KP for the transformation at 60 ...

Solved • Nov 1, 2018

Equilibrium Expressions

Q. A sample of ammonium chloride was heated in a closed container.NH4 Cl(s) ⇌ NH3(g) + HCl(g)At equilibrium, the pressure of NH3(g) was found to be 1....

Solved • Nov 1, 2018

Equilibrium Expressions

Q. Calculate the number of moles of HI that are at equilibrium with 1.25 mol of H  2 and 1.25 mol of I2 in a 5.00−L flask at 448°C.H2 + I2 ⇌ 2HI      ...

Solved • Nov 1, 2018

Equilibrium Expressions

Q. Hydrogen is prepared commercially by the reaction of methane and water vapor at elevated temperatures.CH4(g) + H2 O(g) ⇌ 3H2(g) + CO(g)What is the ...

Solved • Nov 1, 2018

Equilibrium Expressions

Q. What is the value of the equilibrium constant at 500 °C for the formation of NH  3 according to the following equation?N2(g) + 3H2(g) ⇌ 2NH3(g)An e...

Solved • Nov 1, 2018

Equilibrium Expressions

Q. Nitrogen and oxygen react at high temperatures.(a) Write the expression for the equilibrium constant (K c) for the reversible reactionN2(g) + O2(g)...

Solved • Nov 1, 2018

Equilibrium Expressions

Q. Among the solubility rule previously discussed is the statement: Carbonates, phosphates, borates, and arsenates—except those of the ammonium ion an...

Solved • Oct 31, 2018

Equilibrium Expressions

Q. Among the solubility rules previously discussed is the statement: All chlorides are soluble except Hg2Cl2, AgCl, PbCl2, and CuCl.(b) Write the expr...

Solved • Oct 31, 2018

Equilibrium Expressions

Q. Among the solubility rules previously discussed is the statement: All chlorides are soluble except Hg2Cl2, AgCl, PbCl2, and CuCl.(a) Write the expr...

Solved • Oct 31, 2018

Equilibrium Expressions

Q. Ethyl ethanoate (commonly called ethyl acetate), CH3CO2C2H5, is an important solvent used in nail polish remover, lacquers, adhesives, the manufact...

Solved • Oct 23, 2018

Equilibrium Expressions

Q. The decomposition of N2O4 at 25°C, N2O4(g) ⇌ 2NO2(g) has Kc = 4.61 x 10-3. A 1.31 L vessel contained 0.0432 mol N2O4 at equilibrium. What was the c...

Solved • Oct 23, 2018

Equilibrium Expressions

Q. An equilibrium was established for the reaction CO(g) + H2O(g) ⇌ CO2(g) + H2(g) at 500 °C. (This is an industrially important reaction for the prep...

Solved • Oct 23, 2018

Equilibrium Expressions

Q. Be sure to answer all parts. Consider the heterogeneous equilibrium process: C(s) + CO2(g) ⇋ 2CO(g) At 700°C, the total pressure of the system is f...

Solved • Oct 23, 2018

Equilibrium Expressions

Q. At 409 K, this reaction has a Kc value of 0.0845. 2X(g) + 3Y(g) ⇌ 2Z(g)Calculate Kp at 409 K.[Note that the pressure is in units of atmosphere (atm).]

Solved • Oct 23, 2018

Equilibrium Expressions

Q. For A + 2B ⇌ 2C           Kc = 2.39For 2C ⇌ D            Kc = 0.160Calculate the value of the equilibrium constant for the reactionD ⇌ A + 2B 

Solved • Oct 8, 2018

Equilibrium Expressions

Q. Write the equilibrium-constant expression for the reaction A (s) + 3B (l) ⇌ 2C (aq) + D (aq)in terms of [A], [B], [C), and [D] as needed. 

Solved • Oct 5, 2018

Equilibrium Expressions

Q. Part 1 (1 point) Do not add states of matter to the equilibrium expressions.Write the equilibrium constant expression for the following reaction: N...

Solved • Oct 4, 2018

Equilibrium Expressions

Q. At 2000 K the partial pressures of an equilibrium mixture of H2S, H2, and S are 0.015, 0.041, and 0.025 atm, respectively. Calculate the value of t...

Solved • Sep 18, 2018

Equilibrium Expressions

Q. Calculate the value of the equilibrium constant K for the reaction 2D ⇌ A + 2B from the following information A + 2B ⇌ C             Kc = 3.15C ⇌ 2...

Solved • Sep 18, 2018

Equilibrium Expressions

Q. The reaction 2PH3 (g) + As2 (g) ⇌ 2AsH3 (g) + P2 (g) has Kp = 2.9 x 10-5 at 873 K. At the same temperature, what is Kp for each of the following re...

Solved • Sep 17, 2018

Equilibrium Expressions

Q. The equilibrium constant, Kc, is calculated using molar concentrations. For gaseous reactions another form of the equilibrium constant, Kp, is calc...

Solved • Sep 17, 2018

Equilibrium Expressions

Q. Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used in manufacturing certain dyes and plastics. Phosgene can be produced by...

Solved • Sep 17, 2018

Equilibrium Expressions

Q. For the reaction shown here 2NH3 (g) ⇌ 3 H2 (g) + N2 (g) the equilibrium concentrations were found to be [NH3] = 0.250 M [H2] = 0.540 M [N2] = 0.80...

Solved • Sep 7, 2018

Equilibrium Expressions

Q. Calculate the value of Kp for the equation C (s) + CO2 (g) ⇌ 2CO (g)                       Kp = ? given that at a certain temperature C (s) + 2H2O ...

Solved • Sep 6, 2018

Equilibrium Expressions

Q. Write the following equilibrium-constant expressions: (a) Kc for Cr (s) + 3Ag+ (aq) ⇌ Cr3+ (aq) + 3Ag (s), (b) Kp for 3Fe (s) + 4H2O(g) ⇌ Fe3O4 (s)...

Solved • Sep 5, 2018

Equilibrium Expressions

Q. Consider the following elementary reaction: ICl (g) + H2 (g) → HI (g) + HCl (g) Suppose we let k1 stand for the rate constant of this reaction, and...

Solved • Sep 5, 2018

Equilibrium Expressions

Q. The equilibrium constant, Kc, for the following reaction is 2.01 x 10-2 at 710 K. NH4I (s) ⇌ NH3 (g) + HI (g) Calculate Kc at this temperature for ...

Solved • Aug 30, 2018

Equilibrium Expressions

Q. Consider the reaction for the Haber synthesis of ammonia: N2(g) + 3H2 (g) → 2NH3 (g). Which of the following is the correct equilibrium expression?...

Solved • Aug 30, 2018