Chemistry: Atoms First
3rd Edition
ISBN: 9781259638138
Author: Julia Burdge, Jason Overby Professor
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 17, Problem 17.112QP
Phenolphthalein is the common indicator for the titration of a strong acid with a strong base. (a) If the pKa of phenolphthalein is 9.10, what is the ratio of the nonionized form of the indicator (colorless) to the ionized form (reddish pink) at pH 8.00? (b) If 2 drops of 0.060 M phenolphthalein are used in a titration involving a 50.0-mL volume, what is the concentration of the ionized form at pH 8.00? (Assume that 1 drop = 0.050 mL.)
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Consider the titration of a weak acid that has a pKa = 4.00. Suppose a chemist was going to perform a titration on 50.0 mL of 0.050 0 M of the weak acid using 0.500 M NaOH. (A) What would be the pH of the solution after 0.00 mL of 0.500 M NaOH has been added?(B) What would be the pH halfway to the equivalence point of the titration?(C) What would be the pH at the equivalence point in the titration? (D) What would be the pH of the solution after 6.00 mL of 0.500 M NaOH has been added?
Use the following reasoning when solving this problem.
Because at the equivalence point the moles of strong base (0.500 M NaOH) added as a titrant equal the moles of weak acid, HA (50.0 ml of 0.050 M) in the solution, we can start by calculating the volume of 0.500 M NaOH needed to reach the equivalence point. To do this we simply equate the moles of HA to moles of NaOH by using the dilution formula. i.e. MaVa = MbVb where a represents HA and b represents NaOH. To calculate volume of NaOH needed to reach…
(a) Sketch a pH vs base volume curve for a weak acid/strong base titration. (b) Identify which region of the curve is the equivalence point. (c) Assuming the titration is stopped exactly at the equivalence point, and that the acid's Ka value is 1.82 x 10-5, what is the pH at the equivalence point?
A chemist has synthesized a monoprotic weak acid and wants to determine its pKa value. To do so, they dissolved 2.00 mmol of the solid acid in 100.0 mL of water and then titrated the resulting solution with 0.0500 M NaOH. After20.0 mL of added NaOH, the pH of the solution was 6.00. What is the pKa of the acid?(a) 5.85 (b) 7.02 (c) 9.90 (d) 6.00
Chapter 17 Solutions
Chemistry: Atoms First
Ch. 17.1 - Determine the pH at 25C of a solution prepared by...Ch. 17.1 - Determine the pH at 25C of a solution prepared by...Ch. 17.1 - Determine the pH at 25C of a solution prepared by...Ch. 17.1 - Prob. 17.1.1SRCh. 17.1 - Prob. 17.1.2SRCh. 17.2 - Starting with 1.00 L of a buffer that is 1.00 M in...Ch. 17.2 - Prob. 2PPACh. 17.2 - Prob. 2PPBCh. 17.2 - Prob. 17.3WECh. 17.2 - Prob. 3PPA
Ch. 17.2 - Prob. 3PPBCh. 17.2 - Prob. 17.2.1SRCh. 17.2 - Consider 1 L of a buffer that is 0.85 M in formic...Ch. 17.2 - Prob. 17.2.3SRCh. 17.2 - Prob. 17.2.4SRCh. 17.3 - Calculate the pH in the titration of 50.0 mL of...Ch. 17.3 - For the titration of 10.0 mL of 0.15 M acetic acid...Ch. 17.3 - Prob. 4PPBCh. 17.3 - Prob. 4PPCCh. 17.3 - Prob. 17.5WECh. 17.3 - Prob. 5PPACh. 17.3 - Prob. 5PPBCh. 17.3 - Which of the graphs [(i)(iv)] best represents the...Ch. 17.3 - Prob. 17.6WECh. 17.3 - Prob. 6PPACh. 17.3 - Prob. 6PPBCh. 17.3 - Calculate the pH at the equivalence point in the...Ch. 17.3 - Prob. 17.3.2SRCh. 17.3 - Prob. 17.3.3SRCh. 17.4 - Calculate the solubility of copper(II) hydroxide...Ch. 17.4 - Calculate the molar solubility and the solubility...Ch. 17.4 - Calculate the molar solubility and the solubility...Ch. 17.4 - Prob. 17.8WECh. 17.4 - Prob. 8PPACh. 17.4 - Prob. 8PPBCh. 17.4 - Prob. 8PPCCh. 17.4 - Prob. 17.9WECh. 17.4 - Predict whether a precipitate will form from each...Ch. 17.4 - Prob. 9PPBCh. 17.4 - Prob. 17.4.1SRCh. 17.4 - Prob. 17.4.2SRCh. 17.4 - Prob. 17.4.3SRCh. 17.5 - Prob. 17.10WECh. 17.5 - Calculate the molar solubility of AgI in (a) pure...Ch. 17.5 - Arrange the following salts in order of increasing...Ch. 17.5 - Prob. 17.11WECh. 17.5 - Determine if the following compounds are more...Ch. 17.5 - Prob. 11PPBCh. 17.5 - Prob. 11PPCCh. 17.5 - Prob. 17.12WECh. 17.5 - Prob. 12PPACh. 17.5 - Prob. 12PPBCh. 17.5 - Beginning with a saturated solution of AgCl, which...Ch. 17.5 - Prob. 17.5.1SRCh. 17.6 - Prob. 17.13WECh. 17.6 - Prob. 13PPACh. 17.6 - Prob. 13PPBCh. 17.6 - Prob. 17.6.1SRCh. 17.6 - Prob. 17.6.2SRCh. 17 - Which of the acids in Table 16.5 (page 732) can be...Ch. 17 - Prob. 17.3KSPCh. 17 - How much sodium fluoride must be dissolved in 250...Ch. 17 - Use Le Chteliers principle to explain how the...Ch. 17 - Describe the effect on pH (increase, decrease, or...Ch. 17 - Prob. 17.3QPCh. 17 - Prob. 17.4QPCh. 17 - Determine the pH of (a) a 0.40 M CH3COOH solution,...Ch. 17 - Determine the pH of (a) a 0.20 M NH3 solution, and...Ch. 17 - Which pair of substances can be dissolved together...Ch. 17 - Prob. 17.2VCCh. 17 - Prob. 17.3VCCh. 17 - Prob. 17.4VCCh. 17 - Prob. 17.7QPCh. 17 - Prob. 17.8QPCh. 17 - Calculate the pH of the buffer system made up of...Ch. 17 - Calculate the pH of the following two buffer...Ch. 17 - Prob. 17.11QPCh. 17 - Prob. 17.12QPCh. 17 - Prob. 17.13QPCh. 17 - The pH of blood plasma is 7.40. Assuming the...Ch. 17 - Calculate the pH of the 0.20 M NH3/0.20 M NH4Cl...Ch. 17 - Calculate the pH of 1.00 L of the buffer 1.00 M...Ch. 17 - Prob. 17.17QPCh. 17 - Prob. 17.18QPCh. 17 - Prob. 17.19QPCh. 17 - Prob. 17.20QPCh. 17 - The diagrams [(a)(d)] contain one or more of the...Ch. 17 - Prob. 17.22QPCh. 17 - Prob. 17.23QPCh. 17 - Prob. 17.24QPCh. 17 - Prob. 17.25QPCh. 17 - The amount of indicator used in an acid-base...Ch. 17 - Prob. 17.27QPCh. 17 - Prob. 17.28QPCh. 17 - Prob. 17.29QPCh. 17 - Prob. 17.30QPCh. 17 - Prob. 17.31QPCh. 17 - Prob. 17.32QPCh. 17 - Prob. 17.33QPCh. 17 - Prob. 17.34QPCh. 17 - A 25.0-,L solution of 0n100 M CH3COOH is titrated...Ch. 17 - A 10.0-mL solution of 0.300 M NH3 is titratee with...Ch. 17 - Prob. 17.37QPCh. 17 - Prob. 17.38QPCh. 17 - Prob. 17.39QPCh. 17 - Prob. 17.40QPCh. 17 - Diagrams (a) through (d) represent solutions at...Ch. 17 - Prob. 17.42QPCh. 17 - Prob. 17.43QPCh. 17 - Prob. 17.44QPCh. 17 - Write balanced equations and solubility product...Ch. 17 - Prob. 17.46QPCh. 17 - Prob. 17.47QPCh. 17 - Prob. 17.48QPCh. 17 - Prob. 17.49QPCh. 17 - Prob. 17.50QPCh. 17 - Prob. 17.51QPCh. 17 - The solubility of an ionic compound MX (molar mass...Ch. 17 - Prob. 17.53QPCh. 17 - Prob. 17.54QPCh. 17 - Prob. 17.55QPCh. 17 - Prob. 17.56QPCh. 17 - Prob. 17.57QPCh. 17 - A volume of 75 mL of 0.060 M NaF is mixed with 25...Ch. 17 - Prob. 17.59QPCh. 17 - Prob. 17.60QPCh. 17 - Prob. 17.5VCCh. 17 - Prob. 17.6VCCh. 17 - Prob. 17.7VCCh. 17 - How would the concentration of silver ion in the...Ch. 17 - Prob. 17.61QPCh. 17 - Prob. 17.62QPCh. 17 - Prob. 17.63QPCh. 17 - Prob. 17.64QPCh. 17 - The solubility product of PbBr2 is 8.9 106....Ch. 17 - Prob. 17.66QPCh. 17 - Calculate the molar solubility of BaSO4 in (a)...Ch. 17 - Prob. 17.68QPCh. 17 - Prob. 17.69QPCh. 17 - Prob. 17.70QPCh. 17 - Prob. 17.71QPCh. 17 - Prob. 17.72QPCh. 17 - Calculate the concentrations of Cd2+, Cd(CN)42 ,...Ch. 17 - Prob. 17.74QPCh. 17 - Prob. 17.75QPCh. 17 - (a) Calculate the molar solubility of...Ch. 17 - Prob. 17.77QPCh. 17 - Prob. 17.78QPCh. 17 - Prob. 17.79QPCh. 17 - Prob. 17.80QPCh. 17 - Prob. 17.81QPCh. 17 - Prob. 17.82QPCh. 17 - Prob. 17.83QPCh. 17 - Prob. 17.84QPCh. 17 - In a group 1 analysis, a student adds HCl acid to...Ch. 17 - Prob. 17.86QPCh. 17 - Prob. 17.87QPCh. 17 - Sketch the titration curve of a weak acid with a...Ch. 17 - Prob. 17.89QPCh. 17 - Prob. 17.90QPCh. 17 - Prob. 17.91QPCh. 17 - Tris [tris(hydroxymethyl)aminomethane] is a common...Ch. 17 - Prob. 17.93QPCh. 17 - Prob. 17.94QPCh. 17 - Prob. 17.95QPCh. 17 - Prob. 17.96QPCh. 17 - Prob. 17.97QPCh. 17 - Find the approximate pH range suitable for...Ch. 17 - Prob. 17.99QPCh. 17 - Prob. 17.100QPCh. 17 - Prob. 17.101QPCh. 17 - Prob. 17.102QPCh. 17 - Barium is a toxic substance that can seriously...Ch. 17 - The pKa of phenolphthalein is 9.10. Over what pH...Ch. 17 - Prob. 17.105QPCh. 17 - Prob. 17.106QPCh. 17 - Prob. 17.107QPCh. 17 - The molar mass of a certain metal carbonate, MCO3,...Ch. 17 - Prob. 17.109QPCh. 17 - Prob. 17.110QPCh. 17 - Describe how you would prepare a 1 -L 0.20 M...Ch. 17 - Phenolphthalein is the common indicator for the...Ch. 17 - Prob. 17.113QPCh. 17 - Prob. 17.114QPCh. 17 - Prob. 17.115QPCh. 17 - Prob. 17.116QPCh. 17 - Prob. 17.117QPCh. 17 - Prob. 17.118QPCh. 17 - When lemon juice is added to tea, the color...Ch. 17 - How many milliliters of 1.0 M NaOH must be added...Ch. 17 - Prob. 17.121QPCh. 17 - Prob. 17.122QPCh. 17 - Prob. 17.123QPCh. 17 - Prob. 17.124QPCh. 17 - Calcium oxalate is a major component of kidney...Ch. 17 - Water containing Ca2+ and Mg2+ ions is called hard...Ch. 17 - Prob. 17.127QPCh. 17 - Prob. 17.128QPCh. 17 - Prob. 17.129QPCh. 17 - (a) Referring to Figure 17.4, describe how you...Ch. 17 - Prob. 17.131QPCh. 17 - Prob. 17.132QPCh. 17 - Prob. 17.133QPCh. 17 - Prob. 17.134QPCh. 17 - Prob. 17.135QPCh. 17 - Prob. 17.136QPCh. 17 - A sample of 0.96 L of HCl gas at 372 mmHg and 22C...Ch. 17 - Prob. 17.138QPCh. 17 - The solutions (a) through (f) represent various...Ch. 17 - Prob. 17.140QPCh. 17 - Prob. 17.141QP
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- Given three acid-base indicators—methyl orange (end point at pH 4), bromthymol blue (end point at pH 7), and phenolphthalein (end point at pH 9)—which would you select for the following acid-base titrations? (a) perchloric acid with an aqueous solution of ammonia (b) nitrous acid with lithium hydroxide (c) hydrobromic acid with strontium hydroxide (d) sodium fluoride with nitric acidarrow_forwardA chemist wishes to prepare 121.00 mL of acetic acid/sodium acetate buffer solution with a pH of 4.55 and a total concentration of the components equal to 0.35 M. The pKa for acetic acid is 4.75. (a) What mass of acetic acid (molar mass 60.05 g/mol) is required? (b) What mass of sodium acetate (molar mass 82.03 g/mol) is required?arrow_forwardIn the titration of 60.0 mL of 1.0 M methylamine, CH3NH₂ (K₁ = 4.4 x 10-4), with 0.50 M HCI, calculate the pH under the following conditions. (a) after 0.00 mL of 0.50 M HCI has been added 4.0 (b) after 20.0 mL of 0.50 M HCI has been added 4.0✔ (c) after 60.0 mL of 0.50 M HCI has been added 4.0✔ (d) at the stoichiometric point 4.0✔ (e) after 200.00 mL of 0.50 M HCI has been added 4.0arrow_forward
- A buffer consists of 0.50 M NaH₂PO₄ and 0.40 M Na₂HPO₄.Phosphoric acid is a triprotic acid (Kₐ₁=17.2X10⁻³, Kₐ₂=26.3X10⁻⁸, and Kₐ₃=34.2X10⁻¹³). (a) Which Kₐ value is most important to this buffer? (b) What is the buffer pH?arrow_forwardA buffer contains 0.010 mol of lactic acid (pKa = 3.86) and 0.050 mol of sodium lactate per liter. (a) Calculate the pH of the buffer. (b) Calculate thechange in pH when 5 mL of 0.5 M HCl is added to 1 L of the buffer. (c) What pH change would you expect if you added the same quantity of HCl to 1 L of pure water?arrow_forward(a) What is the pH of a buffer prepared by adding 0.506 mol of the weak acid HA to 0.507 mol of NaA in 2.00 L of solution? The dissociation constant Ka of ha IS 5.66 X 10-7. Express the pH numericall to three decimal places (b) What is the pH after 0.150 mol of HCl is added to the buffer from Part A? Assume no volume change on the addition of the acid. Express the pH numerically to three decimal places. (c) What is the pH after 0.195 mol of NaOH is added to the buffer from Part A? Assume no volume change on the addition of the base. Express the pH numerically to three decimal placesarrow_forward
- (a) (i) A tap water sample has a hardness of 285 mg/L as CaCO3. What is the predominant form of this hardness at a pH of 7.5?(ii) Provide a balanced chemical reaction showing how this hardness can be removed by the addition of lime (Ca(OH)2).(iii) How much lime is required to precipitate the hardness in 2.5 litres of this tap water? How much calcium carbonate will be precipitated? Assume the reaction is 100% efficient and the solubility of calcium carbonate under these conditions is 40 mg/LAtomic weights:Ca = 40H = 1C = 12 O = 16(b) Explain and discuss the concept of CT values to evaluate the performance of chemical oxidation processes as disinfectants during drinking water treatment.arrow_forward31. (a) Calculate the pH of a mixture containing 0.1 M propanoic acid (CH3CH₂COOH) and 0.050 M sodium propanoate (CH3CH₂COONa) (b) Determine the change in pH that occurs when 0.15 mol solid NaOH is added to 1.00 litre of the buffered solution. 32. (a) Calculate the pH of a buffer solution produced by adding 3.28 g of sodium ethanoate to 1 dm3 of 0.01 M of ethanoic acid (Ka = 1.84x 10-5 at 300K) (b) calculate the pH of this buffer if 10 cm3 of 0.1 M HCl are now addedarrow_forwardConsider a buffer solution containing HCN and NaCN where the concentration of HCN is double the concentration of NaCN. Which statement about the buffer solution is true? (A) The pH of this solution is equal to the pK, value of HCN. (B) The pKa value of HCN will decrease if a strong acid is added. (C) The cyanide ion concentration will increase if a strong base is added. (D) The buffer capacity of this solution will improve if a strong acid is added.arrow_forward
- (a) Determine the pH of a buffer containing 0.12 M acetic acid (pKa = 4.76) and 0.078 M sodium acetate? (b) For 1.00 L of the buffer in part (a) of this question, estimate its buffer capacity if 14 mL of 1.0 M HCl is added to the buffer. (c) Calculate buffer capacity using the van Slyke equation and compare this value with the buffer capacity determined in part (b) of this question. (d) (i) Calculate the pH of a 55 mg mL-1 solution of ascorbic acid (pKa = 4.17, M = 176.1 g mol-1). (ii) What is the degree of ionization (in %) of a 55 mg mL-1 solution of ascorbic acid at a pH of 2.0 and at a pH of 7.0? (iii) Briefly explain how the differences in ionization values arise between these two pH values. (e) A 5% w/v solution of lignocaine hydrochloride (M = 270.79 g/mol) is prepared. The solubility of lignocaine (M = 234.34 g/mol), a weak organic base (pKa = 7.95 and M = 234.33 g/mol) is 3.81 mg/mL. Calculate the pH at which lignocaine will begin to precipitate out of this solution.arrow_forward(a) A 0.1044-g sample of an unknown monoprotic acid requires 22.10 mL of 0.0500 M NaOH to reach the end point. What is the molar mass of the unknown? (b) As the acid is titrated, the pH of the solution after the addition of 11.05 mL of the base is 4.89. What is the Ka for the acid?arrow_forwardWhen a 24.4 mL sample of a 0.357 M aqueous hydrocyanic acid solution is titrated with a 0.322 M aqueous potassium hydroxide solution, (1) What is the pH at the midpoint in the titration? (2) What is the pH at the equivalence polnt of the titration? (3) What is the pH after 40.6 mL of potassium hydroxide have been added?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Chemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
Chemistry: Principles and Reactions
Chemistry
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:Cengage Learning
Chemistry & Chemical Reactivity
Chemistry
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:Cengage Learning
Acid-Base Titration | Acids, Bases & Alkalis | Chemistry | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=yFqx6_Y6c2M;License: Standard YouTube License, CC-BY