I want this example to find a value mole fraction and molality. Please help me. And thank you so much 1 % YA . NFundamentals+of+a...->into a mixture of H', HSO, , SO, ions. 1 here are essentially no H,SO, moleculesin this solution. The equilibrium concentrations of the ions are 1.01, 0.99, and 0.01M, respectively.Equilibrium molar concentrations are usually symbolized by placing square brack-ets around the chemical formula for the species. So, for our solution of H,SO, withan analytical concentration of qH so, =1.0 M, we write[H,SO] = 0.00 M[H*] = 1.01 M[HSO,] = 0.99 M[SO,?-] = 0.01 MEXAMPLE 4-4Calculate the analytical and equilibrium molar concentrations of the solutespecies in an aqueous solution that contains 285 mg of trichloroacetic acid,Cl,CCOOH (163.4 g/mol), in 10.0 mL (the acid is 73% ionized in water).SolutionAs in Example 4-3, we calculate the number of moles of Cl,CCOOH, which we desig-nate as HA, and divide by the volume of the solution, 10.0 mL, or 0.0100 L. Therefore,1g HA1 mol HA163.4 g HAamount HA = nHA = 285 mg HA X1000 mg HA= 1.744 X 10-3 mol HAThe molar analytical concentration, CHA, is then1.744 X 10 mol HA1000 mŁmol HACHA =0.174= 0.174 M10.0 mŁ1 LLIn this solution, 73% of the HA dissociates, giving H* and A:HA=H* + AThe equilibrium concentration of HA is then 27% of CHA- Thus,(HA] = CHA X (100 – 73)/100 = 0.174 X 0.27 = 0.047 mol/L= 0.047 MThe equilibrium concentration of A is equal to 73% of the analytical concentrationof HA, that is,73 mol Amol HA[A] =X 0.174= 0.127 M100 mol HA(continued)Copyright 2013 Cengage Learning. All Rights Reserved. May not be copied., scanned, or duplicated, in whole or in part. Due to electronic rights, some thind party coment may be suppresseddeemed that any suppressed content does not materially affect the overall leaming experience. Cengage Learning reserves the right to remove additional content at any time iCНАPТER 4Calculations Used in Analytical ChemistryBecause 1 mole of H* is formed for each mole of A", we can[H*] [A"] = 0.127 Mand...

Mass of trichloroacetic acid = 285 mg Molar mass of trichloroacetic acid = 163.4 grams Number of…

Calculate the analytical and equilibrium molar concentrations of the solute species in an aqueous solution that contains 285 mg of trichloroacetic acid, Cl,ccoOH (163.4 g/mol), in 10.0 mL (the acid is 73% ionized in water).

Calculate the analytical and equilibrium molar concentrations of the solute species in an aqueous solution that contains 285 mg of trichloroacetic acid, Cl,ccoOH (163.4 g/mol), in 10.0 mL (the acid is 73% ionized in water).

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter13: Chemical Equilibrium

Section: Chapter Questions

Problem 8RQ: A common type of reaction we will study is that having a very small K value (K 1). Solving for...

See similar textbooks

Similar questions

The amino acid alanine has two isomers, -alanine and -alanine. When equal masses of these two compounds are dissolved in equal amounts of a solvent, the solution of -alanine freezes at the lowest temperature. Which form, -alanine or -alanine, has the larger equilibrium constant for ionization (HXH++X)?
Write the equilibrium constant expression for each reaction in terms of activities, simplifying where appropriate. a C(s)+O2(g)CO2(g) b P4(s)+5O2(g)P4O10(s) c 2HNO2(g)+3Cl2(g)2NCl3(g)+H2(g)+2O2(g)
At a certain temperature, K=0.29 for the decomposition of two moles of iodine trichloride, ICl3(s), to chlorine and iodine gases. The partial pressure of chlorine gas at equilibrium is three times that of iodine gas. What are the partial pressures of iodine and chlorine at equilibrium?
A 0.010 M solution of the weak acid HA has an osmotic pressure (see chapter on solutions and colloids) of 0.293 atm at 25 C. A 0.010 M solution of the weak acid HB has an osmotic pressure of 0.345 atm under the same conditions. (a) Which acid has the larger equilibrium constant for ionization HA[HA(aq)A(aq)+H+(aq)] or HB[HB(aq)H+(aq)+B(aq)]? (b) What are the equilibrium constants for the ionization of these acids? (Hint: Remember that each solution contains three dissolved species: the weak acid (HA or HB). the conjugate base (A- or B- and the hydrogen ion (H+). Remember that osmotic pressure (like all colligative properties) is related to the total number of solute particles. Specifically for osmotic pressure, those concentrations are described by molarities.)
In a particular experiment, the equilibrium constant measured for the reaction, Cl2(g)+NO2(g)Cl2NO2(g), is 2.8. Based on this measurement, calculate AG° for this reaction. Calculate AG° using data from Appendix E at the back of the book and discuss the agreement between your two calculations.
Methanol can be synthesized by means of the equilibriumreaction CO(g)+2H2(g)CH3OH(g) for which the equilibrium constant at 225°C is 6.08103. Assume that the ratio of the pressures of CO(g) and H2(g) is 1:2. What values should they have if the partial pressureof methanol is to be 0.500 atm?
Because carbonic acid undergoes a second ionization, the student in Exercise 12.39 is concerned that the hydrogen ion concentration she calculated is not correct. She looks up the equilibrium constant for the reaction HCO,-(aq) «=* H+(aq) + COf'(aq) Upon finding that the equilibrium constant for this reaction is 4.8 X 10“H, she decides that her answer in Exercise 12.39 is correct. Explain her reasoning. A student is simulating the carbonic acid—hydrogen carbonate equilibrium in a lake: H,CO,(aq) 5=6 H+(aq) + HCO,'(aq) K = 4.4 X 10'7She starts with 0.1000 A1 carbonic acid. W hat are the concentrations of all species at equilibrium?
Hard water has a high concentration of calcium and magnesium ions. Focusing on the calcium ion, a common home water -softening process is based on a reversible chemical change that can be expressed by Na2Ze(s)+Ca2+(aq)CaZe(s)+2Na+(aq). Na2Ze represents a solid resin that is like an ionic compound between sodium ions and zeolite ions, a complex arrangement of silicate and aluminate groups; CaZe is the corresponding calcium compound. When, during the day, is this system most likely to reach equilibrium? Why doesnt it reach equilibrium and stay there? Periodically it is necessary to recharge the water softner by running salt water, NaCl(aq), through it. Why is this necessary? What concept is discussed in this chapter does the recharging process illustrate? Zeolite ions are used in home water softners because they have a porous but rigid structure that is weakly attracted to cations, readily allowing an exchange among different ions.
7-29 The following reaction was allowed to reach equilibrium at 25°C. Under each component is its equilibrium concentration. Calculate the equilibrium constant, K, for this reaction.
. Many sugars undergo a process called mutarotation, in which the sugar molecules interconvert between two isomeric forms, finally reaching an equilibrium between them. This is true for the simple sugar glucose, C6H12O6, which exists in solution in isomeric forms called alpha-glucose and beta-glucose. If a solution of glucose at a certain temperature is analyzed, and it is found that the concentration of alpha-glucose is twice the concentration of beta-glucose, what is the value of K for the inter-conversion reaction?
5.8. The hemoglobin in blood establishes an equilibrium with oxygen gas very quickly. The equilibrium can be represented as where “heme” stands for hemoglobin and “” stands for the hemoglobin-oxygen complex. The value for the equilibrium constant for this reaction is about . Carbon monoxide also binds with hemoglobin by the following reaction: This reaction has an equilibrium constant of . Which reaction’s equilibrium lies farther toward products? Does your answer justify the toxicity of ?
Equilibrium exists between butane and isobutane when [butane] = 0.020 M and [isobutane] = 0.050 M. An additional 0.0200 mol/L of isobutane is added to the mixture. What are the concentrations of butane and isobutane after equilibrium has again been attained?