Consider the following reactions, write the expressions for Kc and Kp and determine their units. Unit for concentration should be mol/dm3 and for pressure kPa. d) Ca3(PO4)2 (s) = 3 Ca²*(aq) + 2 PO4³ (aq)
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- Consider the reaction NH4+(aq) H+(aq)+NH3(aq) Use G f for NH3(aq) at 25C=26.7 kJ/mol and the appropriate tables to calculate (a) G at 25C (b) Ka at 25CFor the reaction: A-> products: What are the units for k if m=2? *The answer must be in the form of a fraction.Calcium hydroxide is a base that does not dissolve very well in water. When saturated, a calcium hydroxide solution at 25°C contains 1,3 gram Ca(OH)2 per dm3 solution. The molar mass of Ca(OH)2 is 74,1 g×mol–1. When the Ca(OH)2 dissolves, the following reaction represents the solubility equilibrium: Ca(OH)2 (s) D Ca2+ (aq) + 2 OH– (aq) Use this information above to find the value of Ksp for Ca(OH)2 at 25°C.
- Calcium hydroxide is a base that does not dissolve very well in water. When saturated, a calcium hydroxide solution at 25°C contains 1,3 gram Ca(OH)2 per dm3 solution. The molar mass of Ca(OH)2 is 74,1 g×mol–1. When the Ca(OH)2 dissolves, the following reaction represents the solubility equilibrium: Ca(OH)2 (s) D Ca2+ (aq) + 2 OH– (aq) Use this information above to find the value of Ksp for Ca(OH)2 at 25°C. What is the pH of this saturated Ca(OH)2 solution?Write three equivalent KP relations for reacting ideal-gas mixtures ?Determine whether the statements below are true or false. I: Kp and Kc are related through the ideal gas law. ["", ""] II: For equilibria where the number of moles of gaseous reactants and products are equal, Kc and Kp are numerically equal.
- 3. Consider the reaction: SO2Cl2(g)⇌SO2(g)+Cl2(g),SO2Cl2(g)⇌SO2(g)+Cl2(g), Kp Kp=2.91×103 at 298 KK In a reaction at equilibrium, the partial pressure of SO2SO2 is 0.135 torr and that of Cl2Cl2 is 0.370 torr. a. What is the partial pressure of CO2CL2 in this mixture? Express your answer in torr using three significant figures.10.0 mol PCl3(g), 20.0 mol Cl2(g), and 40.0 mol PCl5(g) are introduced in a previously evacuated 10.0-L vessel at 25.0oC. The KP for the reaction at this temperature is 1.47×10–7: PCl5(g) →← PCl3(g) + Cl2(g), KP= 1.47×10–7 What is the immediate Gibbs free energy change for the reaction? In what direction the reaction will spontaneously approach equilibrium? Enter your answer with correct units and significant figures, and check the correct box below: Reaction proceeds spontaneously forward towards equilibrium. Reaction is at equilibrium. Reaction proceeds spontaneously backward towards equilibrium.Calculate the percentage change in Kx for the reaction H2CO(g) ⇋ CO(g) + H2(g) when the total pressure is increased from 1.0 bar to 2.0 bar at constant temperature.
- While ethanol CH3CH2OH is produced naturally by fermentation, e.g. in beer- and wine-making, industrially it is synthesized by reacting ethylene CH2CH2 with water vapor at elevated temperatures. A chemical engineer studying this reaction fills a 200.mL flask with 1.2atm of ethylene gas and 1.3atm of water vapor. When the mixture has come to equilibrium she determines that it contains 0.25atm of ethylene gas and 0.35atm of water vapor. The engineer then adds another 0.30atm of ethylene, and allows the mixture to come to equilibrium again. Calculate the pressure of ethanol after equilibrium is reached the second time. Round your answer to 2 significant digits.Glauber’s salt, also called Mang Xiao, is a hydrate of sodium sulfate. It is used for medicinal purposes. At 25 ⁰C, Kp for the dehydration of the salt is 4.08 X 10-25. Na2SO4 10H2O (s) ⇌ Na2SO4 (s) + 10 H20 (g) What is the vapor pressure of water in a closed container holding the salt at equilibrium at 25 ⁰C? Briefly explain the effect on the mass of the dehydrated salt of each: a. Adding more sodium b. Reducing the container c. Increasing the partial pressure of water vapor in the d. Adding inert (no reaction) N2 gas to the systemGlauber’s salt, also called Mang Xiao, is a hydrate of sodium sulfate. It is used for medicinal purposes at 25 0C, Kp for the dehydration of the salt is 4.08 X 10^-25 Na2SO4 10H2O (s) ⇌ Na2SO4 (s) + 10 H20 (g) What is the vapor pressure of water in a closed container holding the salt at equilibrium at 25 0C? Briefly explain the effect on the mass of the dehydrated salt of each: a. Adding more sodium sulfate. b. Reducing the container volume.c. Increasing the partial pressure of water vapor in the flask. d. Adding inert (no reaction) N2 gas to the system.