Part A Water ionizes by the equation H2O(1) =H (ag) + OH (ag) The extent of the reaction is small in pure water and dilute aqueous solutions. This reaction creates the following relationship between [H+] and [OH ]: What is the H+ concentration for an aqueous solution with pOH = 3.10 at 25 °C? Express your answer to two significant figures and include the appropriate units. Kw = [H*][OH ] • View Available Hint(s) Keep in mind that, like all equilibrium constants, the value of K, changes with temperature. HÀ ? [H*] = Value Units Submit Part B Arrange the following aqueous solutions, all at 25 °C, in order of decreasing acidity. Rank from most acidic to most basic. To rank items as equivalent, overlap them. • View Available Hint(s)

Part A Water ionizes by the equation H2O(1) =H (ag) + OH (ag) The extent of the reaction is small in pure water and dilute aqueous solutions. This reaction creates the following relationship between [H+] and [OH ]: What is the H+ concentration for an aqueous solution with pOH = 3.10 at 25 °C? Express your answer to two significant figures and include the appropriate units. Kw = [H][OH ] • View Available Hint(s) Keep in mind that, like all equilibrium constants, the value of K, changes with temperature. HÀ ? [H] = Value Units Submit Part B Arrange the following aqueous solutions, all at 25 °C, in order of decreasing acidity. Rank from most acidic to most basic. To rank items as equivalent, overlap them. • View Available Hint(s)

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter18: Electrochemistry

Section: Chapter Questions

Problem 18.103QE

See similar textbooks

Similar questions

at 60°C, water has an autoionization constant (Kw) of 9.247 X 10-14. Determine the pOH of pure water at 60°C
For the reaction N2 (g) + 3H2(g) --> 2 NH3 (g), (a) what is the reaction Gibbs free energy at equilibrium in J/mol? The equilibrium constant of the reaction N2 (g) + 3H2(g) --> 2 NH3 (g) at 81 oC is Keq = 478,789. (b) What is the standard reaction Gibbs energy of this reaction in J/mol?
For the reaction N2 (g) + 3H2(g) --> 2 NH3 (g), (a) what is the reaction Gibbs free energy at equilibrium? ....... J/mol The equilibrium constant of the reaction N2 (g) + 3H2(g) --> 2 NH3 (g) at 68 oC is Keq = 401,568. (b) What is the standard reaction Gibbs energy of this reaction?.....J/mol
4.32) Certain bacteria in soil obtain the necessary energy for growth by oxidizing nitrite to nitrate: 2NO2- (aq) + O2 (g) —-> 2NO3- Given that the standard Gibbs energies of formation of NO2- and NO3- are -34.6 kJ mol-1 and -110.5 kJ mol-1, respectively, Calculate the amount of Gibbs energy released when 1 mole of NO2- is oxidized to 1 mole of NO3-.
Sodium acetate, NaCH3CO2, of mass 7.4 g is used to prepare 250 cm3 of aqueous solution. What is the pH of the solution?
Complete and balance each of the following equations for acid-base reactions. Express your answer as a chemical equation. Identify all of the phases in your answer. H2SO4(aq)+KOH(aq)→H2SO4(aq)+KOH(aq)→
The standard Gibbs free energy change at 100oC is 18.8 kJ/mol for the solubility equilibrium: Li3PO4(s) →← 3Li+(aq) + PO43–(aq); ∆Gorxn = 18.8 kJ/mol What is the molar solubility of lithium phosphate at this temperature? Enter your answer with correct units and significant figures.
Express the concentration in % w/v that is equivalent to 0.5 M NaOHsolution.
For biological and medical applications it is often necessary to consider proton transfer equilibria at body temperature (37 °C). The value of Kw for water at body temperature is 2.5 x 10-14 (a) What are the va lue of [H3O+) and the pH of neutral water at 37 °C. (b) What is the molar concentration ofOH- ions and the pOH of neutral water at 37 °C?
Certain bacteria in the soil obtain the necessary energy for growth by oxidizing nitrite to r nitrate: 2NO2- (aq) + O2(g) —> 2NO3-(aq) Given that the standard Gibbs energies of formation of NO2- and NO3- are -34.6 kJ mol-1 and -110.5 kJ mol-1, respectively, calculate the amount of Gibbs energy released when 1 mole of No2- is oxidized to 1 mole of NO3-.
Determine the standard Gibbs free energy of reaction, in kJ/mole, for the reaction of aqueous sodium carbonate with hydrochloric acid. G values for the reactants and products are given below. NaCO(aq) + 2 HCl(aq) 2 NaCl(aq) + HO() + CO(g) NaCO(aq) -1051.6HCl(aq) -131.2NaCl(aq) -393.1HO() -237.1CO(g) -394.4
The quantity of 83.0 g of potassium iodide (KI) is added to water to give a solution with a mass of 150. g. Assume that this solution is very dilute and thus has the same heat capacity as water. The dissolution reaction and the associated heat for potassium iodide is KI (s) -→ K+(aq) + I-(aq) qrx = DHrx = +20.3 kJ. Calculate the change in the temperature of the solution.