A reaction was carried out between 18 ml of a 0.05 M solution of hydrochloric acid with 24 ml of a 0.2 M solution of ammonium hydroxide with (Kb = 1.8x 10 -5) at a temperature of 25 ° C. What is pH and pOH respectively of the solution product after the reaction. Note that the molecular weight of ammonium hydroxide is 35 g /mole and the molecular weight of hydrochloric acid is 36.5 g /mole.

A reaction was carried out between 18 ml of a 0.05 M solution of hydrochloric acid with 24 ml of a 0.2 M solution of ammonium hydroxide with (Kb = 1.8x 10 -5) at a temperature of 25 ° C. What is pH and pOH respectively of the solution product after the reaction. Note that the molecular weight of ammonium hydroxide is 35 g /mole and the molecular weight of hydrochloric acid is 36.5 g /mole.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter31: Introduction To Analytical Separations

Section: Chapter Questions

Problem 31.17QAP

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A reaction was carried out between 18 ml of a 0.05 M solution of hydrochloric acid with 24 ml of a 0.2 M solution of ammonium hydroxide with (Kb-1.8x 10-5) at a temperature of 25 C. What is pH and pOH respectively of the solution product after the reaction. Note that the molecular weight of ammonium hydroxide is 35 g /mole and the molecular weight of hydrochloric aeid is 36.5 q/mole.
if 1L of 1M acetic acid is mixed with .25 mole of solid NaOH (assume no volume change), what will the pH be of the resulting solution (Ka= 1.8*10-5)
The pH of a 0.0200 M solution of an unknown acid is 2.56. What is the Ka of this acid? To solve this problem: Write the acid dissociation equilibrium for the generic acid “HA” Set up an ICE chart ( with x = the concentration of H3O+ at equilibrium) Write the expression for Ka. Fill this in with the concentrations of H3O+, A- and HA at equilibrium, in terms of x. What is x? Can you find it from the given information? You should be able to use the pH to get the concentration of H3O+, which is x. Do this. Now that you know x, plug in into the Ka expression and find Ka.
[Review Topics] [References] Use the References to access important values if needed for this question. Consider the following equilibrium between 3-methylbenzoic acid (K,a-5.0x10) and its conjugate base: %3D CH3- CH3- H2O + H30* (1) Will lowering the pH shift the equilibrium to the right or to the left? (2) Calculate the ratio of the concentration of 3-methylbenzoate ion to the concentration of 3-methylbenzoic acid at a pH of 1.59. ratio [conjugate base] / [acid] Submit Answer Retry Entire Group 9 more group attempts remaining
What is the pH of a solution that is prepared by dissolving 6.78 grams of acetic acid (formula weight = 60.05 grams/mol) and 8.74 grams of sodium acetate (formula weight = 82.03 grams/mole) in water and diluting to 750.00 mL? The Ka for acetic acid is 1.75e-05.
a) Why can you not prepare a solution of pH = 8 by diluting sufficiently a 0.01 M solution of HCl with water? b) You could determine Ka for benzoic acid by measuring the pH of a 0.010 M solution of benzoic acid. Why is the graphical method used in this experiment a better way of determining Ka? c) List the measurements along with their uncertainties made in the determination of the molar mass of benzoic acid. Calculate the uncertainty in the mola r mass of benzoic acid determined by the titration.
You mix 50.0 mL of 0.250 M CH3COOH with 1.00 mL of 0.500 M NaOH. Calculate the pH of the mixture. The total volume is 51.0 mL. Use two stages method to solve this problem (I. stoichiometric reaction between acid and base, II. Acid-Base Equilibrium, ICE). Ka of CH3COOH = 1.8 x 10-5.
Benzoic acid (C6H5COOH) is a monoprotic weak acid with Ka = 6.30 x 105. What is the pH %3D of a solution of benzoic acid that is 0.559M in benzoic acid and has 2.25 x 10?M NaOH added? On aguenus selution is composed of acetic acid and sodium hydroxide. The acetic acid is tho nH of the solution?
An organic acid (HA) has a molecular weight of 100. g mol-1, a Kow = 5.6 and a K, = 2.7 x 10-2. If originally 2.0 g of the acid is dissolved in 100 mL of octanol (there is no dissociation in octanol), which is then placed in contact with 100 mL of water, what will be the pH of the water? (Consider the equilibrium processes to be sequential and unrelated chemically) O 1.89 1.48 O 2.01 1.74 O 1.61
An organic acid (HA) has a molecular weight of 100g/mol, a Kow = 5.6 and a K, = 2.7 x 10-2. If originally 2.0 g of the acid is dissolved in 100 mL of octanol (there is no dissociation in octanol), which is then placed in contact with 100 mL of water, what will be the pH of the water? (Consider the equilibrium processes to be sequential and unrelated chemically) Possible answers: 1.89, 1.48, 2.01, 1.74, 1.61
Propanoic acid (CH3CH2COOH) has a Ka of 1.3×10–5.FW(propanoic acid) = 74.08 g/mol; FW(calcium propanoate) = 186.22 g/mol a) At what pH will a solution of propanoic acid and sodium propanoate best resist changes to its pH? How do you know? b) 75 g calcium propanoate Ca(CH3CH2COO)2 is diluted to 150.0 mL with deionized water. 50.0 mL of a 3.0 M propanoic acid solution is added. Determine the equilibrium concentrations of each species and the pH of the resulting solution.
4. What is the original molarity of a solution of formic acid (HCOOH) whose pH is 3.26 at equilibrium? 5. Calculate the percent ionization of benzoic acid having the following concentrations: (a) 0.20 M, (b) 0.00020 M. 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],…