General Chemistry: Atoms First
2nd Edition
ISBN: 9780321809261
Author: John E. McMurry, Robert C. Fay
Publisher: Prentice Hall
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 15.3, Problem 15.6CP
The following pictures represent solutions that contain a weak acid HA and/or its sodium salt NaA. (Na+ ions and solvent water molecules have been omitted for clarity.)
- (a) Which of the solutions are buffer solutions?
- (b) Which solution has the greatest buffer capacity?
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
11
(a) Define a buffer solution
(b) What are the components of
(i) an acidic buffer ?
(ii) a basic buffer ?
You are asked to prepare a pH = 3.00 buffer solution startingfrom 1.25 L of a 1.00 M solution of hydrofluoric acid(HF) and any amount you need of sodium fluoride (NaF).(a) What is the pH of the hydrofluoric acid solution priorto adding sodium fluoride? (b) How many grams of sodiumfluoride should be added to prepare the buffer solution?Neglect the small volume change that occurs when the sodiumfluoride is added.
(a) Calculate the pH of a buffer solution containing 0.40 mole of KF and 0.50 mol of HF in 1.50 liter solution. (Ka of HF is 7.2*10–4); 15.0 mL of 1.00 M HCl is added to the original buffer in question (a).
(b) Show the equation of reaction which take place when HCl is added.
(c) What will the pH of the buffer solution in question (a) be after the addition of 15.0 mL of 1.00 M HCl.
Chapter 15 Solutions
General Chemistry: Atoms First
Ch. 15.1 - Write balanced net ionic equations for the...Ch. 15.1 - Write balanced net ionic equations for the...Ch. 15.2 - Calculate the concentrations of all species...Ch. 15.2 - Calculate the pH in a solution prepared by...Ch. 15.2 - Prob. 15.5CPCh. 15.3 - The following pictures represent solutions that...Ch. 15.3 - Calculate the pH of 0.100 L of a buffer solution...Ch. 15.3 - Calculate the change in pH when 0.002 mol of HNO3...Ch. 15.4 - Use the HendersonHasselbalch equation to calculate...Ch. 15.4 - Prob. 15.10P
Ch. 15.4 - Suppose you are performing an experiment that...Ch. 15.4 - Prob. 15.12PCh. 15.6 - A 40.0 mL volume of 0.100 M HCl is titrated with...Ch. 15.6 - A 40.0 mL volume of 0.100 M NaOH is titrated with...Ch. 15.7 - The following pictures represent solutions at...Ch. 15.7 - Consider the titration of 100.0 mL of 0.016 M HOCl...Ch. 15.7 - The following acid-base indicators change color in...Ch. 15.9 - Assume that 40.0 mL of 0.0800 M H2SO3 (Ka1 = 1.5 ...Ch. 15.9 - Assume that 40.0 mL of a 0.0250 M solution of the...Ch. 15.10 - Write the equilibrium-constant expression for Ksp...Ch. 15.11 - A saturated solution of Ca3(PO4)2 has [Ca2+] =...Ch. 15.11 - Prob. 15.22PCh. 15.11 - Which has the greater molar solubility: AgCl with...Ch. 15.11 - Prob. 15.24CPCh. 15.12 - Calculate the molar solubility of MgF2 in 0.10 M...Ch. 15.12 - Which of the following compounds are more soluble...Ch. 15.12 - In an excess of NH3(aq), Cu2+ ion forms a deep...Ch. 15.12 - Silver bromide dissolves in aqueous sodium...Ch. 15.13 - Prob. 15.29PCh. 15.13 - Will a precipitate form on mixing 25 mL of 1.0 ...Ch. 15.14 - Prob. 15.31PCh. 15.15 - Prob. 15.32PCh. 15 - The following pictures represent solutions that...Ch. 15 - The following pictures represent solutions that...Ch. 15 - The strong acid HA is mixed with an equal molar...Ch. 15 - The following pictures represent solutions at...Ch. 15 - The following pictures represent solutions at...Ch. 15 - The following pictures represent solutions at...Ch. 15 - Prob. 15.40CPCh. 15 - Prob. 15.41CPCh. 15 - Prob. 15.42CPCh. 15 - Prob. 15.43CPCh. 15 - Is the pH greater than, equal to, or less than 7...Ch. 15 - Prob. 15.45SPCh. 15 - Which of the following mixtures has the higher pH?...Ch. 15 - Which of the following mixtures has the lower pH?...Ch. 15 - Phenol (C6H5OH, Ka = 1.3 1010) is a weak acid...Ch. 15 - Aniline (C6H5NH2, Kb = 4.3 1010) is a weak base...Ch. 15 - The equilibrium constant Kn for the neutralization...Ch. 15 - The equilibrium constant Kn for the neutralization...Ch. 15 - Prob. 15.52SPCh. 15 - Does the pH increase, decrease, or remain the same...Ch. 15 - Prob. 15.54SPCh. 15 - Calculate the pH of a solution prepared by mixing...Ch. 15 - Prob. 15.56SPCh. 15 - The pH of a solution of NH3 and NH4Br is 8.90....Ch. 15 - Prob. 15.58SPCh. 15 - Prob. 15.59SPCh. 15 - Prob. 15.60SPCh. 15 - Which of the following gives a buffer solution...Ch. 15 - Prob. 15.62SPCh. 15 - Prob. 15.63SPCh. 15 - Calculate the pH of a buffer solution that is 0.20...Ch. 15 - Prob. 15.65SPCh. 15 - Calculate the pH of 0.250 L of a 0.36 M formic...Ch. 15 - Calculate the pH of0.375 L of a 0.18 M acetic...Ch. 15 - Prob. 15.68SPCh. 15 - Use the HendersonHasselbalch equation to calculate...Ch. 15 - Prob. 15.70SPCh. 15 - Give a recipe for preparing a CH3CO2HCH3CO2Na...Ch. 15 - Prob. 15.72SPCh. 15 - Prob. 15.73SPCh. 15 - What is the Ka of the amino acid leucine if it is...Ch. 15 - Prob. 15.75SPCh. 15 - Prob. 15.76SPCh. 15 - Make a rough plot of pH versus milliliters of acid...Ch. 15 - Prob. 15.78SPCh. 15 - Consider the titration of 50.0 mL of 0.116 M NaOH...Ch. 15 - Consider the titration of 40.0 mL of 0.250 M HF...Ch. 15 - A 100.0 mL sample of 0.100 M methylamine (CH3NH2,...Ch. 15 - Prob. 15.82SPCh. 15 - Consider the titration of 25.0 mL of 0.0200 M...Ch. 15 - Prob. 15.84SPCh. 15 - The equivalence point was reached in titrations of...Ch. 15 - Prob. 15.86SPCh. 15 - What is the pH at the equivalence point for the...Ch. 15 - Prob. 15.88SPCh. 15 - Prob. 15.89SPCh. 15 - Prob. 15.90SPCh. 15 - Prob. 15.91SPCh. 15 - Prob. 15.92SPCh. 15 - Prob. 15.93SPCh. 15 - Prob. 15.94SPCh. 15 - Prob. 15.95SPCh. 15 - Prob. 15.96SPCh. 15 - Prob. 15.97SPCh. 15 - Use Le Chteliers principle to explain the...Ch. 15 - Use Le Chteliers principle to predict whether the...Ch. 15 - Calculate the molar solubility of PbCrO4 in:...Ch. 15 - Calculate the molar solubility of SrF2 in:...Ch. 15 - Which of the following compounds are more soluble...Ch. 15 - Which of the following compounds are more soluble...Ch. 15 - Prob. 15.104SPCh. 15 - Is the solubility of Fe(OH)3 increased, decreased,...Ch. 15 - Prob. 15.106SPCh. 15 - Prob. 15.107SPCh. 15 - Prob. 15.108SPCh. 15 - Prob. 15.109SPCh. 15 - Calculate the molar solubility of AgI in: (a)Pure...Ch. 15 - Calculate the molar solubility of Cr(OH)3 in 0.50...Ch. 15 - What compound, if any, will precipitate when 80 mL...Ch. 15 - Prob. 15.113SPCh. 15 - Prob. 15.114SPCh. 15 - In qualitative analysis, Al3+ and Mg2+ are...Ch. 15 - Prob. 15.116SPCh. 15 - Can Co2+ be separated from Zn2+ by bubbling H2S...Ch. 15 - Prob. 15.118SPCh. 15 - Prob. 15.119SPCh. 15 - Prob. 15.120SPCh. 15 - Give a method for separating the following pairs...Ch. 15 - Assume that you have three white solids: NaCl,...Ch. 15 - On the same graph, sketch pH titration curves for...Ch. 15 - Prob. 15.124CHPCh. 15 - Prob. 15.125CHPCh. 15 - A saturated solution of Mg(OH)2 in water has pH =...Ch. 15 - Prob. 15.128CHPCh. 15 - In qualitative analysis, Ag+, Hg22+, and Pb2+ are...Ch. 15 - Calculate the molar solubility of MnS in a 0.30 M...Ch. 15 - Prob. 15.131CHPCh. 15 - Prob. 15.132CHPCh. 15 - Prob. 15.133CHPCh. 15 - Prob. 15.134CHPCh. 15 - Prob. 15.135CHPCh. 15 - A 100.0 mL sample of a solution that is 0.100 M in...Ch. 15 - A 0.0100 mol sample of solid Cd(OH)2 (Ksp = 5.3 ...Ch. 15 - Zinc hydroxide, Zn(OH)2 (Ksp = 4.1 1017), is...Ch. 15 - Prob. 15.139CHPCh. 15 - Prob. 15.140MPCh. 15 - Ethylenediamine (NH2CH2CH2NH2, abbreviated en) is...Ch. 15 - A 40.0 mL sample of a mixture of HCl and H3PO4 was...Ch. 15 - A 1.000 L sample of HCl gas at 25 C and 732.0 mm...Ch. 15 - Prob. 15.144MPCh. 15 - Consider the reaction that occurs on mixing 50.0...Ch. 15 - In qualitative analysis, Ca2+ and Ba2+ are...Ch. 15 - A railroad tank car derails and spills 36 tons of...Ch. 15 - Prob. 15.148MP
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
- A buffer solution is prepared by adding 5.50 g of ammonium chloride and 0.0188 mol of ammonia to enough water to make 155 mL of solution. (a) What is the pH of the buffer? (b) If enough water is added to double the volume, what is the pH of the solution?arrow_forwardConsider the titration of HF (K a=6.7104) with NaOH. What is the pH when a third of the acid has been neutralized?arrow_forward3) 2.0 g of NaOH is dissolved in distilled water to prepare 100 mL solution. 20.0 mL of this solution reaches to the equivalence point when 25 mL of an acid solution containing 1.22 g unknown monoprotic weak acid is added. (a) Calculate the molar mass of the unknown acid. (b) After 15.0 mL of NaOH solution had been added during the titration, the pH was determined to be 4.7. What is the Ka of the unknown acid? (NaOH = 40.0 g/mol)arrow_forward
- 6. (a) Consider the pH of a solution containing a weak acid, HA , and a soluble salt of the weak acid, such as NaAarrow_forward(a) Calculate the pH in a solution prepared by dissolving 0.050 mol of acetic acid and 0.020 mol of sodium acetate in water and adjusting the volume to 500 mL.(b) Suppose 0.010 mol of NaOH is added to the buffer from part (a).Calculate the pH of the solution that results.arrow_forwardThe drawing below represents a buffer composed of equal concentrations of a weak acid, HX, and its conjugate base, X-'. The heights of the columns are proportional to the concentrations of the components of the buffer. (a) Which of the three drawing (1), (2), or (3) represents the buffer after the addition of a strong acid? Explain. (b) Which of the three represents the buffer after the addition of a strong base? Explain. HX X HX X- HX X HX X (1) (2) (3) Copyright © 2006 Pearson Prentice Hall, Inc.arrow_forward
- A buffer solution is prepared by dissolving 4.7 g of nitrous acid, HNO2 , and 13.8 g of sodium nitrite, NaNO2, in 1.0 liter of solution. (a) Calculate the pH of the buffer. (b) Calculate the pH of the solution which results when the following are added to separate 100 mL portions of the buffer: (i) 5.0 mmol of HCI; (ii) 5.0 mmol of NaOH. Ka = 4.5 x 104 %3Darrow_forwardA buffer solution was prepared that contained 0.60 M hydrogen fluoride, HF (Ka = 7.2 x 104) and 1.00M potassium fluoride, KF. The total volume was 250 mL. (a) What ions and molecules are present in the solution? List them in order of decreasing concentration: Decreasing order of Concentration (b) What is the pH of the buffer solution described above? (c) What is the pH of 100. mL of the buffer solution if you add 100. x 10-3 g of NaOH? Assume negligible change in volume. (USEFUL INFORMATION: MM NaOH = 39.997 g mol-1)arrow_forwardIn each of the following questions, assume that there is no volume change when HCl is added to water in part (a) or the phosphate buffer in part (c). (a) Calculate the pH when 0.091 moles of HCl are added to 1.000 liter of water. (b) What is the difference between the pH of pure water (pH 7.00) and the pH of the solution after HCl was added? (c) Calculate the pH when 0.091 moles of HCl are added to 1.000 liters of a buffer containing 0.352M KH2PO4 and 0.321 M K2HPO4. (d) The pH before the HCl was added is equal to 7.168. What is the difference between the pH before adding the HCl and after adding the HCl?arrow_forward
- A buffer is prepared by adding 20.0 g of sodium acetate(CH3COONa) to 500 mL of a 0.150 M acetic acid(CH3COOH) solution. (a) Determine the pH of the buffer.(b) Write the complete ionic equation for the reaction thatoccurs when a few drops of hydrochloric acid are added tothe buffer. (c) Write the complete ionic equation for the reactionthat occurs when a few drops of sodium hydroxidesolution are added to the buffer.arrow_forward2.0 g of NaOH is dissolved in distilled water to prepare 100 mL solution. 20.0 mL of this solution reaches to the equivalence point when 25 mL of an acid solution containing 1.22 monoprotic weak acid is added. (a) Calculate the molar mass of the unknown acid. (b) After 15.0 mL of NaOH solution had been added during the titration, the pH was determined to be 4.7. What is the Ka of the unknown acid? (NaOH = 40.0 g/mol) unknownarrow_forward4) A highly toxic hydrogen cyanide (HCN) is a weak acid. A chemical engineer plans to determine pH of a 50 mL sample of HCN (0.10 M) in a titration process. To this end, she used 0.20 M NaOH as a titrant in varying volumes. Calculate the pH of the solution at the following points: (Ka for HCN=6.2×10-¹0) (a) Before addition of NaOH (initial pH), (b) After 10.00 mL of titrant addition, (c) After 25.00 mL of titrant addition, (d) After 50.00 mL of titrant addition.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 Learning
Chemistry: Principles and Reactions
Chemistry
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:Cengage Learning
General Chemistry | Acids & Bases; Author: Ninja Nerd;https://www.youtube.com/watch?v=AOr_5tbgfQ0;License: Standard YouTube License, CC-BY