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Chemical Equilibrium

Gas Reaction Explanation

Step by Step Explanation Ethylene, C2H4, will react with hydrogen gas under appropriate conditions to form ethane, C2H6. A 10.0-liter vessel is charged with 1.5 atm of hydrogen and 1.0 atm of ethylene at 25°C. The reaction is allowed to proceed to completion. Determine the total pressure in the vessel at 25° at the completi

Calculating Values of Equilibrium Constants

Question states: In the reaction of ammonium chloride (as a solid) dissociating to produce ammonia and hydrogen chloride (both as gases), the equilibrium concentration of each product was found to be 3.71x10^-3 (they each have the same concentration, ammonia is 3.71x10^-3 and hydrogen chloride is 3.71x10^-3). Calculate the v

Chemistry Equilibria Example Problem

Of the following equilibria, only _______ will shift to the left in response to a decrease in volume. a. H2 (g) + CL 2 (g) <-> HCL (g) b. 2SO3 (g) <-> 2SO2 (g) + O2(g) c. Ns (g) = 3H2 (g) <-> 2NH3 (g) d. 4Fe (s) = 3O2 (g) <-> 2Fe2O3 (s) e. 2HI (g) <-> H3(g) + I3 (g)

Equilibrium & Buffers

1. You have a 0.087565 M solution of a weak acid, HA, pH=4.18177. How many grams of NaA (molar mass = 62.476 g/mol) would you have to add to this solution (assume that there is no change in volume) to have a solution with a pH of 7.40000. Would this new solution be a good buffer? Please explain. 2. You have a mixture of

Reaction Kinetics - Equilibrium

A.) Consider the reaction: 4HCl (aq) + MnO2 (s) <--> Cl2 (g) + 2 H2O (l) + MnCl2 (aq) Delta (H)degree The equilibrium is displaced to the left if: a. Catalyst is added b. pressure is lowered c. temp is lowered d. H2O is added e. none of these b.) Consider the following gas phase reaction at 25 oC. N2 (g) + C2H2

Some Chemistry Problems

A.) For the reaction: 2Cl2 (g) + 2H2O(g) <----> 4HCl(g) + O2 (g), Kp = 6.4 x 10-6 at 500 K. If a fixed volume is filled with initial concentrations of these gases at 227 oC such that [Cl2] = 0.5 M, [H2O] = 0.40 M, [HCl] = 0.5 M, and [O2] = 0.015 M, in which direction will the reaction proceed? b.) 4.00 mol chlotine and 2.00 m

General Chemistry

1. 4CuO(s) + CH4(g) CO2(g) + 4Cu(s) + 2H2O(g) The value of Kc for this reaction is 1.10 at 25.0°C. What is the value of Kp for this reaction? (R = 0.0821 L-atm/K-mol) a. 4.63 b. 26.9 c. 658 d. 37.2 e. 1.52 x 10-3 2. At a certa

Complex ion equilibria

Complex-Ion Equilibria. When sufficient ammonia is added to a 0.00500 M silver nitrate solution to initially give 0.100 M aqueous ammonia, what is the molarity of the silver ion (Ag+) after the complex ion Ag(NH3)2+ has been formed at equilibrium? Ag+(aq) + 2 NH3(aq) = Ag(NH3)2+(aq)

Solubility and common ion effect

Please help with the following problem. Provide a step by step solution. Solubility and the Common-Ion Effect. In problem 1 it was stated that the molar solubility of PbBr2 in pure water is 1.3 x 10-2 M. Calculate the molar solubility of PbBr2 in A) 0.20 M KBr and in B) 0.20 M Pb(NO3)2 Problem 1 in reference is: The Sol

The solubility product constant

The Solubility Product Constant. PbBr2 is a slightly soluble salt. Write A) the chemical equilibrium equation that describes the salt partially dissolving in water and B) the solubility product expression. C) Calculate the Ksp value for lead(II) bromide if the molar solubility in pure water is 1.3 x 10-2 M.

Chemistry Derivative

LnP = - (delta H vap/ T) (1/T)+C ln P2 = lnP1 + delta H vap / R (1/T - 1/T2) )Gvap=)Hvap - T) Svap G=0. See the attached file.

Calculating Equilibrium Concentrations

Calculating Equilibrium Concentrations. Consider the reaction SO2(g) + NO2(g) = NO(g) + SO3(g) at 460 C. What are the equilibrium concentrations of all reactants and products if the initial concentrations are [SO2]o = [NO2]o = 3.00 x 10-3 M and [NO]o = [SO3]o = 4.00 x 10-2 M? The value of the equilibrium constant for the

Reaction quotient

The Reaction Quotient. The reaction CS2(g) + 4 H2(g) <--> CH4(g) + 2 H2S(g) has an equilibrium constant of 0.28 at 900 C. Fill in the data table below. Please see the attached for the full question.

Find: The Equilibrium Constant

The Equilibrium Constant. Question: Consider the reaction 2 NO2Cl(g) = 2 NO2(g) + Cl2(g). A 12.0-L container holds these gases at equilibrium. What is the value of Kc for this reaction if there are 1.036 g NO2Cl, 5.962 g NO2, and 4.578 g Cl2 at equilibrium?

Solve: Equilibrium constant

The Equilibrium Constant. Question: Consider the reaction SO2Cl2(g) = SO2(g) + Cl2(g), where Kc = 0.078 at 100 Degrees Celsius. What is the molarity of the chlorine gas at equilibrium if the equilibrium mixture contains 2.70 mol SO2Cl2 and 1.30 mol SO2 in a 25.0-L container?

Solving for the Equilibrium Constant

The Equilibrium Constant. Question: Consider the reaction 2 NO(g) + 2 H2(g) = N2(g) + 2 H2O(g). A 3.00-L container is filled with a mixture of 0.300 mol NO, 0.150 mol H2, and 0.300 mol H2O. When the equilibrium is established [NO] = 0.062 M. What is the value of Kc?

Solve: Calculating the Equilibrium Constant

Question: 1 mol of nitrogen and 1 mol of hydrogen are placed in a flask and allowed to come to equilibrium with the product ammonia (NH3). At equilibrium there are .8 moles of nitrogen present. What is the Keq for the reaction?

Solubility Ksp calculations

How do you complete a solubility Ksp problem? What is the solubility of aluminum hydroxide in water at 25 degrees Celsius if the Ksp is 3 x 10^-34? What is the concentration of Hydroxide at equilibrium? What is the concentration of a sulfide ion in a 1L solution of cuprous sulfide to which .03mol of cuprous nitrate has be

Calculating the equilibrium constant

Calculating the equilibrium constant. I have had trouble with this problem. The EXACT question asks: Calculate the equilibrium constant at 298K for the following equation. Sn(+2)(aq) + MnO4(-1)(aq) ===> Sn(+4)(aq) + Mn(+2) I understand Kc = (Products^(stoic. coefficients))/(Reactants^(stoic. coeffic

Acid base equilibrium

If the formation of products is strongly favoured in this acid base system: HX+(B-)<>HB+(X-) The competing bases are B- and X-, am I correct? B- is a stronger base, am I correct ? Does K for this system have a large or small value and why? How would the equilibrium be affected by the addition of the soluble salt N

Precipitation in a Solution

The solubility of a product of Ca(OH)2 is 7.9 (10^-6) at 25 C. Will a precipitate form when 100mL of 0.10 mol/L of CaCl2 solution and 50.0 mL of 0.070 mol/L of NaOH solution are combined. Please explain the procedure to this answer by showing all steps.

Equilibrium Constant Value

GIVEN THE EQUILIBRIUM CONSTANT VALUE OF Kc FOR THE FOLLOWING RECTION AT 300 CELSIUS N2(g) + 1/2 O2(g) N2O(g) Kc=3.4 * 10 XY -18(SQUARE ROOT) AT 300 CELSIUS N2O4(g) 2NO2(g) kc=4.6*10(SQUARE RROT OF -3 AT 300 CELSIUS 1/2N2(g) + O2(g)

Finding the equilibrium constant

A mixture of 1 mol of H2O (g) and 1 mol CO (g) is placed in an evacuated 1 liter reaction vessel at 1200 K at equilibrium 0.478 mols of O2 was present. Find Kc CO(g) + H2O (g)<--------> CO2 (g) + H2(g) Is this correct? E = 1-x 1-x <----> 0.478 + x + x 0.478 + x (x) / 1.0-2x+x2 0.478x + x2 It looks li

Equilibrium - Gas Pressure and Partial Pressure

In the manufacture of sodium carbonate, NaHCO3(s) is decomposed by heating. 2 NaHCO3(s) Na2CO3(s) + CO2(g) + H2O(g) Kp=0.23 at 100 celsius. 1- If a sample of NaHCO3(S) is brought a temperature of 100

Calculating Partial Pressures, Given Equilibrium Constant

The equilibrium constant Kc for the decomposition of phosgene, COCl2, is 4.63 x 10^-3 at 527 deg C. COCl2(g)<--->CO(g)+Cl2(g) Calculate the equilibrium partial pressure of all the components, starting with pure phosgene at 0.760 atm Answer should give partial pressures of COCl2, CO, Cl2. I do not understand also what i

Given concentration, change a product concentration, what is concentrations

Equilibrium process at 686 deg C: C02(g) + H2 <---> CO(g) + H20(g) [CO2] is 0.086 M [H2] is 0.045 M [CO] is 0.050 M [H20] is 0.040 M Calculate Kc for the reaction at 686 deg C. If you add CO2 to increase it concentration to 0.55 mol/L, what will the concentrations off all the gases be when equilibrium is re-establis

Acid Base Equilibrium Questions

1) A 0.223 molar solution of the weak acid, HA, with a pKa of 3.954 is titrated with a 0.142 molar solution of NaOH. What is the pH of the solution at the equivalence point of this titration? 2) 0.1405 mol of potassium cyanide (KCN) is used to prepare 609.1 mL of an aqueous solution. Take the pKa of hydrogen cyanide as 9.38.

Calculating Equilibrium Constant at a Certain Temperature

A mixture containing 3.9 moles of NO and 0.88 mole of CO2 was allowed to react in a flask at a certain temp according to the equation: NO(g)+CO2(g) f/r NO2(g)=CO(g) At equilibrium, 0.11 mole of CO2 present. Calculate equilibrium constant, Kc.