Question 3. In an experiment for the determination of the heat of proton ionization of an organic acid, the pH values of al0.1 Mof acetic acid at different temperatures were measured and were collected in the following data sheet: 258.70 a) 59.8 Temperature (C) pH 3.2 3.0 2.9 2.7 Calculate the heat of proton ionization (AH) of acetic acid, in kJ/mol. b) -59.S 10.0 20.0 30.0 40.0 c) 53.2 ! d) -53.2 e) -68.1

Question 3. In an experiment for the determination of the heat of proton ionization of an organic acid, the pH values of al0.1 Mof acetic acid at different temperatures were measured and were collected in the following data sheet: 258.70 a) 59.8 Temperature (C) pH 3.2 3.0 2.9 2.7 Calculate the heat of proton ionization (AH) of acetic acid, in kJ/mol. b) -59.S 10.0 20.0 30.0 40.0 c) 53.2 ! d) -53.2 e) -68.1

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Write chemical equations that show how the following bases react with water to produce hydroxide ions: (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) amethoxide ion (OCH3), a strong base 1 + b hypobromite ion (BrO), a weak base + + + + Ctriazole (C₂H3N3), a weak base +
In an experiment, it is found that the pH's of four salts, AA, AB, AC, and AD are 5.0, 6.5, 11.0 and 9.0, respectively. Arrange the acids in order of increasing acid strength. (1 is the least acidic and 4 is the most acidic)
4
Dissolved carbon dioxide in seawater occurs mainly in three inorganic forms (see figure below): free aqueous carbon dioxide (CO2(aq)), bicarbonate (HCO3), and carbonate ions (CO3²). (a) Using the figure, rank the concentrations of these species from highest to lowest. (b) If surface ocean pH were to fall from 8.0 to 7.0, how would this ranking change? -1.5 2 H+ Surface Ocean pH OH HCO3 -2.5 -3 CO₂ Log [concentration (mol kg¹)] сл + -4.5 50 2 4 6 PH 8 10 co 123 12 14
Chemists use a number denoted by pH to describe quantitatively the acidity or basicity of solutions. Bydefinition, pH = - log [H+], where [H+] is the hydrogen ion concentration in moles per liter.
Calculate the pH and pOH of the following solutions :1- 0.01 M HBr2- 0.00005 M HBr3- 0.00002 M KOH4- 0.01 M CH COOH5- 0.00001 M CH,COOH6- 0.01 M HIO,7-0.01 M pyridine
a) Write the formula for the conjugate base of HPO,2 b) Write the formula for the conjugate acid of NH;
**) How much work is needed to move a proton (hydronium ion) from pH=8 to pH=7?
For each of the following entities • Identify it as a strong or weak acid. • Select the correct arrow to show the changes that occur when the acids are placed in water. • Select the approximate pH for each resulting solution. HCI(aq) is classified as a + acid. The reaction equation with water utilizes which of the following arrows? Choice A Choice B 7 >>7 H2SO3(aq) is classified as a The reaction equation with water would utilize which of the following arrows? Choice A Choice B < 50% H2SO3(aq) + H20(I) • HSO3 (aq) + H30*(aq) The approximate pH of the solution would be
What is the concentration of the hydroxide ion, OH-, in solution at equilibrium if the pH of the solution is 7.65? Nitrogen and oxygen react at high temperatures according to the following equation: N2(g) +O2(g) ⇄ 2NO(g) where ∆H=181kJ At equilibrium what will happen to the concentrations of N2, O2, and NO at equilibrium if N2 is removed? Calculate the pH of the following weak base: 0.5M NH3 with Kb =1.8x10−5
Calculate [H3O+] at 25 °C for each solution and determine if the solution is acidic, basic, or neutral.(a) [OH-] = 1.5 * 10-2 M (b) [OH-] = 1.0 * 10-7 M (c) [OH-] = 8.2 * 10-10 M
Given the following information: nitrous acid HNO2 hydrocyanic acid = HCN HNO, is a stronger acid than HCN (1) Write the net ionic equation for the reaction that occurs when equal volumes of 0.058 M aqueous nitrous acid and sodium cyanide are mixed. It is not necessary to include states such as (aq) or (s). (2) Which is the strongest base, NO, or CN ? (3) At equilibrium the will be favored.