Chemistry Chemistry Practice Problems Solutions Library

The Reaction Quotient Solutions Library

Access 123 The Reaction Quotient video and text solutions to help you complete your homework. Need to revisit the concept? Watch our The Reaction Quotient learn videos.

Browse Solutions

123 solutions

The Reaction Quotient

Q. Balance the equation and write the reaction-quotient expression, Qc.U(s) + F2(g) ⇌ UF6(g)

Solved • Mar 20, 2020

The Reaction Quotient

Q. What is the value of Q when the solution contains 2.50?10?3M Mg2+ and 2.00?10?3M CO32? ?

Solved • Mar 20, 2020

The Reaction Quotient

Q. Consider the following reaction:2HF (g) ⇌ H2 (g) + F2(g) (Kc = 1.00 × 10–2)Given that 1.00 mol of HF(g), 0.371 mol of H2(g), and 0.750 mol of F2(g)...

Solved • Feb 17, 2020

The Reaction Quotient

Q. For the reaction 2HI(g) ⇌ H2(g) + I2(g), Kc = 0.290 at 400 K. If the initial concentrations of HI, H2, and I2 are all 1.50 × 10–3 M at 400 K, which...

Solved • Feb 17, 2020

The Reaction Quotient

Q. Kp = 4.5x10-5 for the reaction 3O2 ⇌ 2O3 (at 800 C). Initially, a 3.0 liter flask was filled with 0.50 atm of O2 and 0.0025 atm of O3. What is the ...

Solved • Feb 4, 2020

The Reaction Quotient

Q. At 2300 C, Kc for the reaction: N2(g) + O2(g) ⇌ 2NO(g) equals 1.7x10-3.Which of the following statements are correct?I Kp for this reaction also eq...

Solved • Feb 4, 2020

The Reaction Quotient

Q. Which of the following statements regarding equilibrium is/are correct?I If Q > Keq, the reaction must shift toward reactants to be at equilibri...

Solved • Feb 4, 2020

The Reaction Quotient

Q. Which of the following statements is not true?A) The products are favored when Q < Keq B) The reactants are favored when Q > Keq C) The react...

Solved • Jan 24, 2020

The Reaction Quotient

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)At 500 K, the gase...

Solved • Dec 20, 2019

The Reaction Quotient

Q. Given that Kp = 1.39 at 400 °C for the reaction, P4(g) <=> 2 P2(g), which answer best describes the reaction when 1.50 mol of P4(g) and 1.15 ...

Solved • Dec 19, 2019

The Reaction Quotient

Q. Given that Kp = 1.39 at 400°C for the reaction, P4(g) <=> 2 P2(g), which answer best describes the reaction when 1.50 mol of P4(g) and 1.15 m...

Solved • Dec 19, 2019

The Reaction Quotient

Q. Consider the gas-phase reaction, N2(g) + 3 H2(g) <=> 2 NH3 (g), for which Kp = 43 at 400 K. If the mixture is analyzed and found to contain 0...

Solved • Dec 16, 2019

The Reaction Quotient

Q. The water-gas shift reaction is an extremely important one in industry.CO(g) + H2O(g) ⇌ CO2(g) + H2(g)At a given temperature, Kp =2.7. If 0.13 mole...

Solved • Dec 12, 2019

The Reaction Quotient

Q. The water-gas shift reaction is an extremely important one in industry.CO(g) + H2O(g) <=> CO2(g) + H2(g)At a given temperature, Kp =2.7. If 0...

Solved • Dec 11, 2019

The Reaction Quotient

Q. For the reaction system      H2(g) + X2(g) ⇌ 2 HX(g)Kc = 24.4 at 300 K. If the reaction is set up with the following initial concentrations, what w...

Solved • Nov 18, 2019

The Reaction Quotient

Q. Mercury and oxygen react to form mercury(II) oxide as shown below:2 Hg(l) + O2(g) ⇌ 2 HgO(s)At a certain temperature in a 8.4 L reaction vessel tha...

Solved • Nov 18, 2019

The Reaction Quotient

Q. For the following reaction, Kc = 4.6 × 10−7 at 530 °C.I2(g) ⇌ 2 I(g)What is Qc and which way will the reaction shift if the concentration of I2 = I...

Solved • Nov 12, 2019

The Reaction Quotient

Q. Consider the Haber process, 3 H2(g) + N2(g) ↔ 2 NH3(g). At a particular temperature, an equilibrium mixture contains 0.0030 M NH3(g), 0.10 M H2(g) ...

Solved • Nov 12, 2019

The Reaction Quotient

Q. Consider the gas-phase reaction, 2 SO2 + O2 <=> 2 SO3, for which Kp = 2 at a given temperature. If the mixture is analyzed and found to conta...

Solved • Nov 1, 2019

The Reaction Quotient

Q. A 1.00 L reaction vessel contains 1.2 mol CO(g), 1.5 mol H 2(g), and 2.0 mol CH3OH(g). How will Ptotal change as the system approaches equilibrium ...

Solved • Aug 25, 2019

The Reaction Quotient

Q. When Fe(NO3)3(aq) and KSCN(aq) were initially mixed they reacted and established an equilibrium with [Fe(SCN)]2+(aq). Write the net ionic chemical ...

Solved • Aug 6, 2019

The Reaction Quotient

Q. What is the value of Q when the solution contains 2.50 x 10 -3 M Mg2+ and 2.00 x 10-3 M CO32-?

Solved • Jul 9, 2019

The Reaction Quotient

Q. Consider a reaction A2(g) + B2(g) ⇌ 2AB(g), with atoms of A shown in red here and atoms of B shown in blue. If Kc = 1, which system is at equilibrium?

Solved • Jan 3, 2019

The Reaction Quotient

Q. If Qc< Kc, in which direction will a reaction proceed in order to reach equilibrium?

Solved • Dec 11, 2018

The Reaction Quotient

Q. What condition must be satisfied so that Qc=Kc?

Solved • Dec 11, 2018

The Reaction Quotient

Q. If Qc> Kc, how must the reaction proceed to reach equilibrium?

Solved • Dec 11, 2018

The Reaction Quotient

Q. At the start of a certain reaction, only reactants are present; no products have been formed. What is the value of Qc at this point in the reaction?

Solved • Dec 11, 2018

The Reaction Quotient

Q. Consider the reaction: N2(g) + 3H2(g) → 2NH3(g)Write the equilibrium constant expression for this reaction. If some hydrogen is added, before the r...

Solved • Dec 11, 2018

The Reaction Quotient

Q. Consider the reaction: N2(g) + 3H2(g) → 2NH3(g)If some hydrogen is added, before the reaction shifts, will the reaction have to shift forward or ba...

Solved • Dec 11, 2018

The Reaction Quotient

Q. Consider the reaction and its equilibrium constant: N2O4(g) ⇌ 2NO2(g); Kc = 5.85 x 10–3 (at some temperature)A reaction mixture contains [NO2] = 0....

Solved • Dec 11, 2018

The Reaction Quotient

Q. Consider the reaction: 2H2S(g) ⇌ 2H2(g) + S2(g), Kp = 2.4 x 10–4 (at 1073 K)A reaction mixture contains 0.113 atm of H2, 0.056 atm of S2, and 0.604...

Solved • Dec 11, 2018

The Reaction Quotient

Q. The solid XY decomposes into gaseous X and Y: XY(s) ⇌ X(g) + Y(g); Kp=4.1 (at 0˚C). If the reaction is carried out in a 22.4 L container, which ini...

Solved • Dec 11, 2018

The Reaction Quotient

Q. An equilibrium mixture contains N2O4 (P = 0.29 atm) and NO2 (P = 1.2 atm) at 350 K. The volume of the container is doubled at constant temperature....

Solved • Dec 11, 2018

The Reaction Quotient

Q. A mixture of water and graphite is heated to 600 K. When the system comes to equilibrium it contains 0.15 mol of H2, 0.15 mol of CO, 0.57 mol of...

Solved • Dec 11, 2018

The Reaction Quotient

Q. At 650 K, the reaction MgCO3(s) ⇌ MgO(s) + CO2(g) has Kp = 0.026. A 12.6 L container at 650 K has 1.0 g of MgO(s) and CO2 at P = 0.0260 atm. The co...

Solved • Dec 11, 2018

The Reaction Quotient

Q. A system at equilibrium contains I2(g) at a pressure of 0.27 atm and I(g) at a pressure of 0.26 atm . The system is then compressed to half its vol...

Solved • Dec 11, 2018

The Reaction Quotient

Q. Consider the following reaction: NH4HS(s) ⇌ NH3(g) + H2S(g)At a certain temperature, Kc = 8.5 x 10–3. A reaction mixture at this temperature contai...

Solved • Dec 11, 2018

The Reaction Quotient

Q. Silver sulfate dissolves in water according to the following reaction: Ag2SO4(s) ⇌ 2 Ag+(aq) + SO42–(aq), Kc = 1.1 x 10–5 at 298 K.A 1.5-L solution...

Solved • Dec 11, 2018

The Reaction Quotient

Q. In what direction will a reaction proceed for each condition? Q > K

Solved • Dec 11, 2018

The Reaction Quotient

Q. What is the value of Q when each reactant and product is in its standard state?

Solved • Dec 11, 2018

The Reaction Quotient

Q. For the reaction N2O4(g) (g), a reaction mixture at a certain temperature initially contains both N2O4 and NO2 in their standard states. If Kp = 0....

Solved • Dec 11, 2018

The Reaction Quotient

Q. Consider the reaction2NO2 (g) ⇌ N2O4 (g)For each of the following mixtures of reactants and products at 25°C, predict the direction in which the re...

Solved • Nov 30, 2018

The Reaction Quotient

Q. Consider the reaction2NO2 (g) ⇌ N2O4 (g)For each of the following mixtures of reactants and products at 25°C, predict the direction in which the re...

Solved • Nov 30, 2018

The Reaction Quotient

Q. When 0.100 mol of CaCO3(s) and 0.100 mol of CaO(s) are placed in an evacuated sealed 10.0-L container and heated to 385 K, PCO2 = 0.220 atm after e...

Solved • Nov 8, 2018

The Reaction Quotient

Q. The “filmstrip” represents five molecular scenes of a gaseous mixture as it reaches equilibrium over time:X is purple and Y is orange: X2(g) + Y2(g...

Solved • Nov 8, 2018

The Reaction Quotient

Q. Compound A decomposes according to the equation                  A(g) ⥫⥬ 2B(g) + C(g)A sealed 1.00-L container initially contains 1.75×10−3 mol of ...

Solved • Nov 7, 2018

The Reaction Quotient

Q. The water-gas shift reaction plays a central role in the chemical methods for obtaining cleaner fuels from coal: CO(g) + H2O(g) ⥫⥬ CO2(g) + H2(g)At...

Solved • Nov 7, 2018

The Reaction Quotient

Q. At 100°C, Kp = 60.6 for the reaction2NOBr(g) ⥫⥬ 2NO(g) + Br2(g)In a given experiment, 0.10 atm of each component is placed in a container. Is the s...

Solved • Nov 7, 2018

The Reaction Quotient

Q. At 425°C, Kp = 4.18×10−9 for the reaction2HBr(g) ⥫⥬ H2(g) + Br2(g)In one experiment, 0.20 atm of HBr(g), 0.010 atm of H2(g), and 0.010 atm of Br2(g...

Solved • Nov 7, 2018

The Reaction Quotient

Q. The interhalogen ClF3 is prepared via a two-step fluorination of chlorine gas:Cl2(g) + F2(g) ⥫⥬ ClF(g)ClF(g) + F2(g) ⥫⥬ ClF3(g)(b) Show that the ov...

Solved • Nov 7, 2018

The Reaction Quotient

Q. Write Qc of the following:(d) Solid molybdenum(VI) oxide reacts with gaseous xenon difluoride to form liquid molybdenum(VI) fluoride, xenon gas, an...

Solved • Nov 7, 2018

The Reaction Quotient

Q. Write Qc for the following:(a) Hydrogen chloride gas reacts with oxygen gas to produce chlorine gas and water vapor.

Solved • Nov 7, 2018

The Reaction Quotient

Q. Balance the following example of heterogeneous equilibria and write the reaction quotient, Qc:(a) Al(s) + NaOH(aq) + H2O(l) ⥫⥬ Na[Al(OH)4](aq) + H2(g)

Solved • Nov 7, 2018

The Reaction Quotient

Q. Balance the following example of heterogeneous equilibria and write the reaction quotient, Qc:(c) S8(s) + F2(g) ⇌ SF6(g)

Solved • Nov 7, 2018

The Reaction Quotient

Q. Balance the following reaction and write its reaction quotient, Qc:(a) O2(g) ⥫⥬ O3(g)

Solved • Nov 7, 2018

The Reaction Quotient

Q. At a particular temperature, K = 1.00 x 102 for the reactionH2(g) + I2(g) ⇌ 2HI(g)In an experiment, 1.00 mole of H2, 1.00 mole of I2, and 1.00 mole...

Solved • Nov 4, 2018

The Reaction Quotient

Q. At a particular temperature, K = 3.75 for the reaction SO2(g) + NO2(g) ⇌ SO3(g) + NO(g)If all four gases had initial concentrations of 0.800 M, cal...

Solved • Nov 4, 2018

The Reaction Quotient

Q. Ethyl acetate is synthesized in a nonreacting solvent (not water) according to the following reaction:CH3CO2H + C2H5OH ⇌ CH3CO2C2H5 + H2O          ...

Solved • Nov 4, 2018

The Reaction Quotient

Q. At 900ºC, Kp = 1.04 for the reaction CaCO3(s) ⇌ CaO(s) + CO2(g)At a low temperature, dry ice (solid CO 2), calcium oxide, and calcium carbonate are...

Solved • Nov 4, 2018

The Reaction Quotient

Q. The equilibrium constant is 0.0900 at 25ºC for the reaction H2O(g) + Cl2O(g) ⇌ 2HOCl(g)For which of the following sets of conditions is the system ...

Solved • Nov 4, 2018

The Reaction Quotient

Q. The following equilibrium pressures were observed at a certain temperature for the reactionN2(g) + 3H2(g) ⇌ 2NH3(g)PNH3 = 3.1 x 10 -2 atmPN2 = 8.5 ...

Solved • Nov 4, 2018

The Reaction Quotient

Q. At a particular temperature a 2.00-L flask at equilibrium contains 2.80 x 10 -4 mole of N2, 2.50 x 10 -5 mole of O2, and 2.00 x 10 -2 mole of N2O. ...

Solved • Nov 3, 2018

The Reaction Quotient

Q. Antimony pentachloride decomposes according to this equation:SbCl5(g) ⇌ SbCl3(g) + Cl2(g)An equilibrium mixture in a 5.00-L flask at 448 °C contain...

Solved • Nov 1, 2018

The Reaction Quotient

Q. Write the expression of the reaction quotient for the ionization of HOCN in water.

Solved • Oct 31, 2018

The Reaction Quotient

Q. The following reaction has KP = 4.50 × 10−5 at 720 K. N2(g) + 3H2(g) ⇌ 2NH3(g) If a reaction vessel is filled with each gas to the partial pressure...

Solved • Oct 31, 2018

The Reaction Quotient

Q. Show that the complete chemical equation, the total ionic equation, and the net ionic equation for the reaction represented by the equation KI(aq) ...

Solved • Oct 31, 2018

The Reaction Quotient

Q. Sulfur dioxide reacts with chlorine at 227°C: SO2(g) +Cl2(g) <—> SO2Cl2(g) Kp for this reaction is 5.1 x 10-2 atm-1. Initially, 1.00 g each o...

Solved • Oct 23, 2018

The Reaction Quotient

Q. The equilbrium constant for the water-gas shift reaction is 5.0 at 400 °C: CO(g) + H2O(g) <—> CO2(g) + H2(g) Determine Qc, if the following a...

Solved • Oct 23, 2018

The Reaction Quotient

Q. Determine Qc, if the following amounts (in moles) of each component is placed in a 10.00 L container.CO2 0.990 CO 0.480 O2 0.590 

Solved • Oct 23, 2018

The Reaction Quotient

Q. Hydrogen lodide gas is formed when hydrogen and iodine gases are combined. H2 (g) + I2 (g) ⇌ 2HI (g)     Keq = 7.1 x 102 at 25°CA student is studyi...

Solved • Oct 9, 2018

The Reaction Quotient

Q. The minerals hematite (Fe2O3) and magnetite (Fe3O4) exist in equilibrium with atmospheric oxygen: 4Fe3O4 (s) + O2 (g) ⇌ 6Fe2O3 (s)           Kp = 2...

Solved • Oct 8, 2018

The Reaction Quotient

Q. Consider this equilibrium reaction at 400 K. Br2 (g) + Cl2 (g) ⇌ 2BrCl (g)        Kc = 7.0 If the composition of the reaction mixture at 400 K is [...

Solved • Aug 9, 2018

The Reaction Quotient

Q. Calculate the equilibrium concentrations of N2O4 and NO2 at 25 °C if the initial concentrations are [N2O4] = 0.0180 M and [NO2] = 0.0410 M. The equ...

Solved • Aug 8, 2018

The Reaction Quotient

Q. 2NO (g) + 2H2 (g) → N2 (g) + 2H2O (g) At the temperature the engineer picks, the equilibrium constant Kp for this reaction is 0.052. The engineer c...

Solved • Jul 25, 2018

The Reaction Quotient

Q. What is the name of Qc?a. Reversibility expressionb. Reaction expressionc. Mass actiond. Equilibrium expressione. Reaction quotient 

Solved • Jul 24, 2018

The Reaction Quotient

Q. For the reaction 2A(g) ⇌ B(g), the equilibrium constant is Kp = 0.76. A reaction mixture initially contains 4.0 atm of gas (PA = 2.0 atm and PB = 2...

Solved • Jul 16, 2018

The Reaction Quotient

Q. Predict and calculate the effect of concentration changes on an equilibrium system. Some SbCl5 is allowed to dissociate into SbCl3, and Cl2 at 521 ...

Solved • Jul 11, 2018

The Reaction Quotient

Q. The equilibrium constant for the following reaction is 0.16 M 0.5 at 3000 K: CO2 (g) <-> CO (g) + 0.5O2(g) Determine Qc if the following amou...

Solved • Jun 25, 2018

The Reaction Quotient

Q. The value of Kc for the reaction: 2NO2 (g) ⇌ N2O4(g) is 6.9 at 447 K. Determine the reaction quotient for a mixture of the two gases in which [NO  ...

Solved • Jun 19, 2018

The Reaction Quotient

Q. Is a mixture of 0.0205 mol NO2(g) and 0.750 mol N2O4(g) and 0.750 mol N2O4(g) in a 5.25 - L flask at 25 ° C at equilibrium ? If not, in which direc...

Solved • May 21, 2018

The Reaction Quotient

Q. Will a precipitate form if the metal ion concentration in a solution of M(CIO2)3 is 0.0246 M and the concentration of CIO2 is 0.0148 M? Ksp for M(C...

Solved • May 12, 2018

The Reaction Quotient

Q. Consider the reaction at 55°C, where [Fe2+] = 3.80 M and [Mg2+] = 0.310 MMg(s) + Fe2+(aq) → Mg+2(aq) + Fe(s)What is the value for the reaction quot...

Solved • Mar 30, 2018

The Reaction Quotient

Q. Balance the equation and write the reaction quotient expression. U(s) + F2(g) ⇌ UF6(g)

Solved • Mar 29, 2018

The Reaction Quotient

Q. Balance the equation and write the reaction-quotient expression, Qc.U (s) + F2 (g) ⇌ UF6 (g)Qc=    ?/?  

Solved • Mar 22, 2018

The Reaction Quotient

Q. The diagram shows the free energy change of the reaction A(g) + B(g) ⇌ C(g).The reaction progress starts on the left with pure reactants, A and B  ...

Solved • Mar 22, 2018

The Reaction Quotient

Q. At 850 K the equilibrium constant for the following reaction is K c = 15.2SO2(g) + O2(g) ⇌ 2SO3(g) If we mix the following concentrations of the th...

Solved • Mar 16, 2018

The Reaction Quotient

Q. Consider the reactionMg(s) + Fe2+(aq) → Mg2+(aq) + Fe(s) at 75°Cwhere [Fe2+] = 2.90M and [Mg 2+] = 0.310Ma. What is the value for the reaction quot...

Solved • Mar 14, 2018

The Reaction Quotient

Q. At 850 K the equilibrium constant for the following reaction is Kc = 15.2SO2(g) + O2(g) ⇌ 2SO3(g)If we mix the following concentrations of the thre...

Solved • Mar 13, 2018

The Reaction Quotient

Q. In which direction will the net reaction proceedX(g) + Y(g) ⇌ Z(g)          Kp = 1.00 at 300 Kfor the set of initial condition? [X] = [Y] = [Z] = 1...

Solved • Feb 15, 2018

The Reaction Quotient

Q. Consider this system at equilibrium.A(aq) ⇌ B(aq)        ΔH = +550 kJ/molWhat can be said about Q and K immediately after an increase in temperatur...

Solved • Dec 15, 2017

The Reaction Quotient

Q. Consider this system at equilibrium.A(aq) ⇌ B(aq)        ΔH = -750 kJ/molWhat can be said about Q and K immediately after an increase in temperatur...

Solved • Dec 15, 2017

The Reaction Quotient

Q. At 500oC, the Kp for the below reaction is 1.45 x10 -5. When 75 atm N2, 35 atm H2, and 5 atm of NH3 are added to a container and heated to 500 oC, ...

Solved • Aug 7, 2017

The Reaction Quotient

Q. Which of the following statements is TRUE? A) If Q < K, it means the reverse reaction will proceed to form more reactants. B) If Q > K, it ...

Solved • Jun 28, 2017

The Reaction Quotient

Q. Consider the following general reaction:2 B4A4 (l) + 2 C2 (g) → 4 A2C (g) + 4 B2 (g),           K c =  0.0596If you have a reaction mixture that co...

Solved • Apr 28, 2017

The Reaction Quotient

Q. Consider the hypothetical reaction below3 A (g) + B (g) ↔ 2 C (g)           Kc = 1.5 x 10-3Which of the following statements is correct if the init...

Solved • Apr 25, 2017

The Reaction Quotient

Q. The reaction A + B ⇌ C + 2D has an equilibrium constant of 3.7 x 10 -3 . Consider a reaction mixture with: [A] = 2.0 x 10-2 M [B] = 1.7 x 10-4 ...

Solved • Apr 18, 2017

The Reaction Quotient

Q. The reaction shown below has Kp = 81.9 at 25°C. I2(g) + Cl2(g) ⇌ 2 ICl(g) A flask contains Pi2 = 0.114 atm, PCl2 = 0.102 atm, and PICl = 0.355 at...

Solved • Apr 18, 2017

The Reaction Quotient

Q. The value of the equilibrium constant at a given temperature for the reaction:                 2HI(g) ⇌ H2(g) + I2(g)         is 0.200.  If [HI] ...

Solved • Mar 23, 2017

The Reaction Quotient

Q. Consider the reaction shown below with its equilibrium constant:            S 2Cl 2(g) + Cl 2(g) --->  2SCl 2(g)  Keq = 4Examine the figure, and...

Solved • Mar 23, 2017

The Reaction Quotient

Q. The research and development unit of a chemical company is studying the reaction of CH4 and H2S, two components of natural gas: CH4(g) + 2H2S(g) ⇌...

Solved • Mar 22, 2017