Tutored Practice Problem 17.3.5COUNTS TOWARDS GRADECalculate the pH and concentration of species present in a polyprotic acid solution.For a 7.46×10-2 M solution of H2S, calculate both the pH and the S²- ion concentration.H2S+ H2O H30+ + HS Kal = 1.0×10-7HS + H2OH3O++ S2- Ka2 = 1.0×10-19Check & Submit AnswerShow ApproachpH =[S²-] =M

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Answered: Tutored Practice Problem 17.3.5 COUNTS…

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter16: Acids And Bases

Section: Chapter Questions

Problem 19QAP: . How is the strength of an acid related to the fact that a competition for protons exists in...

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Write the Lewis structures of the reactants and product of each of the following equations, and identify the Lewis acid and the Lewis base in each: (a) CS2+SHHCS3 (b) BF3+FBF4 (c) I+SnI2SnI3 (d) Al(OH)3+OHAl(OH)4 (e) F+SO3SFO3
. How is the strength of an acid related to the fact that a competition for protons exists in aqueous solution between water molecules and the anion of the acid?
6. Calculate the percent ionization of Ammonium hydroxide, NH4OH at the following concentrations: (a) 0.60 M, (b) 0.0046 M, (c) 0.00028 M. Comment on the trends. 7. A 0.040 M solution of a monoprotic acid (HA) is 14% ionized. Calculate the ionization constant, Kc of the acid.8. (a) Calculate the percent ionization of a 0.20 M solution of the monoprotic acetylsalicylic acid (aspirin) for which Ka = 3.0 x 10-4 .(b)The pH of gastric juice in the stomach of a certain individual is 1.00. After a few aspirin tablets have been swallowed, the concentration of acetylsalicylic acid in the stomach is 0.20M. Calculate the % ionization of the acid under these conditions. What effect does the nonionized acid have on the membranes lining of the stomach?9. Calculate the [H+], [C2O4-2], and [H2C2O4] in a 0.0010M H2C2O4 solution. (Ka = 5.4 x 10-2)
The acid dissociation constants for sulfurous acid are: Ka = 1.2 x 10-2 and Kaz = 6.6 x 10-8. (i) Calculate the pH of a solution of 0.100 M H2SO3. (ii) Calculate the pH of a solution of 0.100M NazSO.. (iii) Calculate the pH of a solution resulting when equal volumes of the solutions described in parts (i) and (ii) are mixed.
A solution of acetic acid CH3COOH, on a laboratory shelf was of undetermined concentration. If the pH of the solution was found to be 2.68, what was the initial concentration of the acid? Ka=1.7x10-5 Ethanolamine, HOC2H4NH2, is a viscous liquid with an ammonia-like odour used to remove hydrogen sulphide from natural gas. A 0.15 mol dm-3 aqueous solution of ethanolamine has a pH of 11.34. What is kb for ethanolamine? What is the concentration of hydroxide ion in a 0.060 mol dm-3 aqueous solution of methylamine, CH3NH2? What is the pH? Kb=4.4x10-4
B represents an acid-base indicator and behaves like a base. Its dissociation equilibrium in an aqueous solution can be written as: B(ac) + H2O(l) <-> +BH(ac) + OH(ac) If B (ac) is yellow +BH is red. Using Le Châtelier's principle, predict the color of the indicator by adding a few drops of the indicator to an aqueous solution of HCl and an aqueous solution of NaOH. Write the corresponding chemical reactions.
Determine the pH during the titration of 57.0 mL of 0.347 M nitrous acid (K₂ = 4.5x10-4) by 0.347 M NaOH at the following points. (Assume the titration is done at 25 °C.) (a) Before the addition of any NaOH (b) After the addition of 14.0 mL of NaOH (c) At the half-equivalence point (the titration midpoint) (d) At the equivalence point (e) After the addition of 85.5 mL of NaOH
PR: (a) Calculate the pH of a buffer solution prepared by dissolving 0.20 mole of sodium cyanate (NaCNO) and 1.0 mole of cyanic acid (HCNO) in enough water to make 800. mL of solution. (10). (b) Calculate the pH after 0.050 moles of NaOH are added to the buffer solution (assume no volume change) (10). Ka (HCNO) = 2.0 × 10-4
The ionization constant of acetic acid HC2H3O2 is 1.8 x 10-5. What will be the pH of a 0.10 M HC2H3O2 solution which is 0.10 M in NaC2H3O2
Calculate the pH of the solution that results when 20.0 mL of 0.1750 M formic acid is: [Ka = 1.8 x 10-4] (a) diluted to 45.0 mL with distilled water. (b) mixed with 25.0 mL of 0.140 M NaOH solution. (c) mixed with 25.0 mL of 0.200 M NaOH solution. (d) mixed with 25.0 mL of 0.200 sodium formate solution
How many moles of B (weak base) would need to be added to 507 mL of 0.28 M BHCl (the acidic salt) to produce a solution with a pH equal to 9.05? Report your answer to the thousandths place. The Kb of the weak base (B) is 4.7 × 10-6 Please explain each step, i want to learn how to solve it myself!
Ascorbic acid C5H7O4CO2H (Ka =7.9x10^-5) also known as vitamin C is an essential nutrient for all mammals. In lab it can also be used to make buffers. Calculate the pH of a buffer solution which is made by mixing 0.250 moles of ascorbic acid and 0.200 moles of the conjugate base sodium ascorbate in a total volume of 0.750 liters.

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