(a)
Interpretation:
The reason for different values of
Concept introduction:
The Gibb’s equation of
With the help of this equation, one can predict the change in
Here, ‘a’ represents the active mass and ‘P’ represents the partial pressure.
The relation between equilibrium constant and
Here,
- R = 8.314 J / mol .K
- T = temperature in Kelvin
(b)
Interpretation:
Whether K for following two equations will be different or same should be explained.
Concept introduction:
The Gibb’s equation of thermodynamic purposed a relation between
With the help of this equation, one can predict the change in
Here, ‘a’ represents the active mass and ‘P’ represents the partial pressure.
The relation between equilibrium constant and
Here,
- R = 8.314 J / mol .K
- T = temperature in Kelvin
Want to see the full answer?
Check out a sample textbook solutionChapter 13 Solutions
GENERAL CHEMISTRY-MOD.MASTERINGCHEM.
- The hydrogen phthalate ion, C8HsO4, is a weak acid with Ka = 3.91 106. C8H5O4(aq)+H2O(l)C8H4O42(aq)+H3O+(aq) What is the pH of a 0.050 M solution of potassium hydrogen phthalate. KC8H5O4? Note: To find the pH for a solution of the anion, we must take into account that the ion is amphiprotic. It can be shown that, for most cases of amphiprotic ions, the H3O+ concentration is [H3O+]=Ka1Ka2 For phthalic acid, C8H6O4 is Ka1 is 1.12 103, and Ka2 is 3.91 106.arrow_forwardApatite, Ca5(PO4)3OH, is the mineral in teeth. On a chemical basis explain why drinking milk strengthens young children’s teeth. Sour milk contains lactic acid. Not removing sour milk from the teeth of young children can lead to tooth decay. Use chemical principles to explain why.arrow_forwardSwimming pool disinfectants produce hypochlorous acid upon dissolution. The weak acid ionizes as follows: HClO (aq) ⇄ H+ (aq) + ClO‒ (aq) Ka=3.0 x 10 ‒8 As strong oxidizing agents, both acid and its conjugate base kill bacteria. However, too high [HClO] is irritating to swimmers’ eyes and too high [ClO‒] will cause the ions to decompose in sunlight. The recommended pH to circumvent both problems is 7.8. Determine the ratio of the weak acid and its conjugate base at this pH.arrow_forward
- Write the equilibrium constant expression for this reaction: H;PO,(aq) - 3 H (aq)+PO (aq) ?arrow_forwardWrite the equilibrium constant expression for this reaction: 2H* (aq) + CO²(aq) → H₂CO3(aq) Oloarrow_forwardWrite the equilibrium constant expression for this reaction: →>> H3PO4(aq) 3 H(aq) +PO(aq)arrow_forward
- 5) Find the concentration of H30*(aq) in a 1.75 M solution of lactic acid, HC3H5O3, at 25°C. Ka= 1.38 x 10*. 6) Write the equilibrium expression for the ionization of HOI, and calculate the concentration of HOI(aq) in solution if [H3O*]=2.3 x 10° M and pKa = 10.7 at 25°C.arrow_forwardA chemical system is set up by placing some solid ammonium chloride in an ammonia solution. The equilibrium established can be represented as follows: NH4*(aq) + H2O(e) 2 H30*(aq) + NH3(aq) The pH of the solution is taken, then a small amount of NaOH(aq) is added and the pH is taken again. What can be said about the change in pH for the solution? The pH significantly increases because a strong base has been added to the solution. The pH significantly decreases because a strong base has been added to the solution. There is very little change to the pH of the solution. If anything the pH of the solution decreases slightly. There is very little change to the pH of the solution. If anything the pH of the solution increases slightly.arrow_forwardAluminum hydroxide dissolves in strong acid by the following reaction. Al(OH)3(s) + 3 H3O+(aq) Al3+ (aq) + 6 H2O(l) (a) What is the equilibrium constant expression for the reaction? (b) Use the following equilibrium constants to calculate the value of K for the above reaction. H3O+(aq) + OH −(aq) 2 H2O(l) K1 = 5.6 x1015 Al(OH)3(s) Al3+(aq) + 3 OH −(aq) K2 = 1.9 x10-33arrow_forward
- Determine the equilibrium constant for the following reaction: Ca(OH)2(s) + 2 H+(aq) --> Ca2+(aq) + 2 H2O(l) given the chemical reactions below. Ca(OH)2(s) --> Ca2+(aq) + 2 OH-(aq) K = 6.5 X 10-6 H2O(l) --> H+(aq) + OH-(aq) K = 1.0 X 10-14arrow_forward8. (a) HA(aq) is a weak acid with a dissociation constant, Ka, of 8.8 x 10−12. What is the pH of a 0.022 M solution of A−(aq)? The temperature is 25 ◦C. (b) For the reaction A(g) =A(l), the equilibrium constant is 0.666 at 25.0 ◦C and 0.222 at 75.0 ◦C. Making the approximation that the entropy and enthalpy changes of this reaction do not change with temperature, at what temperature will the equilibrium constant be equal to 0.777?arrow_forwardYou are on one of Saturn's many moons and discover a substance, Y2O that undergoes autoionization just like water on Earth. Y2O + Y2O ⇌ Y3O+ + OY– Through a series of experiments, you determine the equilibrium constant (Keq) for this autoionization reaction at various temperatures. The value of Keq at 28.7ºC is 7.6 x 10-14. What is the pY of the pure substance at this temperature? Report your answer to the hundreths placearrow_forward
- Chemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningPrinciples of Modern ChemistryChemistryISBN:9781305079113Author:David W. Oxtoby, H. Pat Gillis, Laurie J. ButlerPublisher:Cengage Learning
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning