#25 explain 3 / 583%TC 0.5 M(a) 1 M24. Which of the following is not a property of acids ?(a) They release hydrogen ions in solution.(b) They turn red litmus blue.(c) They have a sour taste.(a) They react with bases.25. Given the following reaction at equilibrium:H20 + CO2H2CO3HCo,decide which way the equilibrium shifts if bicarbonate ion,HCO is removed.(a) to the right(a) insufficient information to tell(b) to the left(c) no change' 26. A 0.9% Nacl solution is:(a) hypotonic(d) none of the abore.(b) hypertonic(c) isotonic27. A beta particle can be represented as :(a)_je(b) He(c) in(d) pComplete the following equation:8728.onThe missing isotope is:85(b)37Rb(c) 35kr(d) 37(a)36If you have40 g of I-131 today, how many grams will you have left in24 days?(a) 5 g29. The isotope I-131 has a half-life of eight days.(b) 10 g(c) 15 g(a) 20 g30. Yttrium-90 encased in glass beads is placed into thepituitary gland where it destroys some of its cells.This is an example of a(h) stage two effect+

Equilibrium is a state of a reaction at which rate of forward reaction become equal to rate of…

of the following is not a property of acids? (a) They release hydrogen ions in solution. (b) They turn red litmus blue. (c) They have a sour taste. (a) They react with bases. 25. Given the following reaction at equilibrium: H20 + CO2 = H,co, *1 + HCo, decide which way the equilibrium shifts if bicarbonate ion, HCo is removed. (c) no change (a) to the right (a) insuf£icient information to tell (b) to the left 26. A 0.9% Nacl solution is: (a) hypotonic (b) hypertonic (c) isotonic

of the following is not a property of acids? (a) They release hydrogen ions in solution. (b) They turn red litmus blue. (c) They have a sour taste. (a) They react with bases. 25. Given the following reaction at equilibrium: H20 + CO2 = H,co, *1 + HCo, decide which way the equilibrium shifts if bicarbonate ion, HCo is removed. (c) no change (a) to the right (a) insuf£icient information to tell (b) to the left 26. A 0.9% Nacl solution is: (a) hypotonic (b) hypertonic (c) isotonic

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter17: Equilibrium

Section: Chapter Questions

Problem 4CR: How is the strength of an acid related to the position of its ionization equilibrium? Write the...

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Most naturally occurring acids are weak acids. Lactic acid is one example. CH3CH(OH)CO2H(s)+H2O(l)H3O+(aq)+CH3CH(OH)CO2(aq) If you place some lactic acid in water, it will ionize to a small extent, and an equilibrium will be established. Suggest some experiments to prow that this is a weak acid and that the establishment of equilibrium is a reversible process.
Ka for acetic acid at 25.0C is 1754 105. At 55.0C, Ka is 1.625 105. What are H and S for the ionization of acetic acid?
Consider the system 4NH3(g)+3O2(g)2N2(g)+6H2O(l)H=1530.4kJ (a) How will the concentration of ammonia at equilibrium be affected by (1) removing O2(g)? (2) adding N2(g)? (3) adding water? (4) expanding the container? (5) increasing the temperature? (b) Which of the above factors will increase the value of K? Which will decrease it?
Acrylic acid is used in the polymer industry in the production of acrylates. Its K, is 5.6 X 10“’. What is the pH of a 0.11 M solution of acrylic acid, CH2CHCOOH?
Consider a 0.60-M solution of HC3H5O3, lactic acid (Ka = 1.4 104). a. Which of the following are major species in the solution? i. HC3H5O3 ii. C3H5O3 iii. H+ iv. H2O v. OH b. Complete the following ICE table in terms of x, the amount (mol/L) of lactic acid that dissociates to reach equilibrium. c. What is the equilibrium concentration for C3H3O3? d. Calculate the pH of the solution.
Kafor acetic acid (HC2H3O2) at 25°C is 1.754105 . At 50°C, Kais 1.633105 . Assuming that H° and S° are not affected by a change in temperature, calculate S° for the ionization of acetic acid.
Consider citric acid, H3C6H5O7, added to many soft drinks. The equilibrium constants for its step-wise ionization areKa1=7.5104 ,Ka2=1.7105, andKa3=4.0107. Write the overall net ionic equation and calculate K for the complete ionization of citric acid.
How is the strength of an acid related to the position of its ionization equilibrium? Write the equations for the dissociation (ionization) of HCI, HNO3, and HClO4in water. Since all these acids are strong acids, what does this indicate about the basicity of the Cl-, NO3, and ClO4ions? Are aqueous solutions of NaCl, NaNO3, or NaClO4basic?
Consider the system 4NH3(g)+3O2(g)2N2(g)+6H2O(l)H=1530.4kJ (a) How will the amount of ammonia at equilibrium be affected by 1. removing O2(g)? 2. adding N2(g)? 3. adding water? 4. expanding the container at constant pressure? 5. increasing the temperature? (b) Which of the above factors will increase the value of K? Which will decrease it?
Consider the equilibrium process depicted in Fig. 17.6. When does the equilibrium state occur?
For the following reactions, predict whether the pressure of the reactants or products increases or remains the same when the volume of the reaction vessel is increased. (a) H2O(l)H2O(g) (b) N2(g)+3H2(g)2NH3(g) (c) C2H4(g)+H2O(g)C2H5OH(g)
Calculate the equilibrium concentrations that result when 0.25 M O2 and 1.0 M HCl react and come to equilibrium. 4HCl(g)+O2(g)2Cl2+2H2O(g)Kc=3.11013