Chemistry
12th Edition
ISBN: 9780078021510
Author: Raymond Chang Dr., Kenneth Goldsby Professor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 16.3, Problem 2PE
Which of the following couples are buffer systems: (a) KF/HF, (b) KBr/HBr, (c) Na2CO3/NaHCO3?
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which of the following are buffer systems?
(a) KF/HF
(b)KBr/HBr
(c)Na2CO3
Which of the following solutions can act as a buffer: (a) KCl/HCl, (b) KHSO4/H2SO4, (c) KNO2/HNO2?
Can NaBr/NaOH be classified as a buffer system?
Chapter 16 Solutions
Chemistry
Ch. 16.2 - What is the pH of a solution containing 0.30 M...Ch. 16.3 - Which of the following couples are buffer systems:...Ch. 16.3 - Calculate the pH of the 0.30 M NH3/0.36 M NH4Cl...Ch. 16.3 - How would you prepare a liter of carbonate buffer...Ch. 16.3 - The diagrams (a)(d) represent solutions containing...Ch. 16.4 - Exactly 100 mL of 0.10 M nitrous acid (HNO2) are...Ch. 16.4 - Calculate the pH at the equivalence point in the...Ch. 16.4 - For which of the following titrations will the pH...Ch. 16.5 - Referring to Table 16.1, specify which indicator...Ch. 16.5 - Under what conditions will the end point of an...
Ch. 16.6 - The diagrams (a)(d) represent solutions of AgCl,...Ch. 16.6 - The solubility of lead chromate (PbCrO4) is 4.5 ...Ch. 16.6 - Calculate the solubility of silver chloride (AgCl)...Ch. 16.6 - Prob. 10PECh. 16.7 - The solubility products of AgCl and Ag3PO4 are 1.6...Ch. 16.7 - AgNO3 is slowly added to a solution that contains...Ch. 16.8 - Prob. 12PECh. 16.9 - Is the solubility of the following compounds...Ch. 16.9 - Calculate whether or not a precipitate will form...Ch. 16.10 - Prob. 15PECh. 16.10 - Calculate the molar solubility of AgBr in a 1.0 M...Ch. 16.10 - Prob. 1RCCh. 16 - Use Le Chteliers principle to explain how the...Ch. 16 - Describe the effect on pH (increase, decrease, or...Ch. 16 - The pKas of two monoprotic acids HA and HB are 5.9...Ch. 16 - Determine the pH of (a) a 0.40 M CH3COOH solution,...Ch. 16 - Determine the pH of (a) a 0.20 M NH3 solution, (b)...Ch. 16 - What is a buffer solution? What constitutes a...Ch. 16 - Which of the following has the greatest buffer...Ch. 16 - Which of the following solutions can act as a...Ch. 16 - Which of the following solutions can act as a...Ch. 16 - Calculate the pH of the buffer system made up of...Ch. 16 - Calculate the pH of the following two buffer...Ch. 16 - The pH of a bicarbonate-carbonic acid buffer is...Ch. 16 - What is the pH of the buffer 0.10 M Na2HPO4/0.15 M...Ch. 16 - The pH of a sodium acetateacetic acid buffer is...Ch. 16 - The pH of blood plasma is 7.40. Assuming the...Ch. 16 - Calculate the pH of the 0.20 M NH3/0.20 M NH4Cl...Ch. 16 - Calculate the pH of 1.00 L of the buffer 1.00 M...Ch. 16 - A student is asked to prepare a buffer solution at...Ch. 16 - The diagrams (a)(d) contain one or more of the...Ch. 16 - The diagrams shown here represent solutions...Ch. 16 - How much NaOH (in moles) must be added to 1 L of a...Ch. 16 - How much HCl (in moles) must be added to 1 L of a...Ch. 16 - Briefly describe what happens in an acid-base...Ch. 16 - Sketch titration curves for the following...Ch. 16 - A 0.2688-g sample of a monoprotic acid neutralizes...Ch. 16 - A 5.00-g quantity of a diprotic acid was dissolved...Ch. 16 - In a titration experiment, 12.5 mL of 0.500 M...Ch. 16 - In a titration experiment, 20.4 mL of 0.883 M...Ch. 16 - A 0.1276-g sample of an unknown monoprotic acid...Ch. 16 - A solution is made by mixing 5.00 102 mL of 0.167...Ch. 16 - Calculate the pH at the equivalence point for the...Ch. 16 - Calculate the pH at the equivalence point for the...Ch. 16 - A 25.0-mL solution of 0.100 M CH3COOH is titrated...Ch. 16 - A 10.0-mL solution of 0.300 M NH3 is titrated with...Ch. 16 - The diagrams shown here represent solutions at...Ch. 16 - Prob. 16.38QPCh. 16 - A 0.054 M HNO2 solution is titrated with a KOH...Ch. 16 - A student titrates an unknown monoprotic acid with...Ch. 16 - Explain how an acid-base indicator works in a...Ch. 16 - The amount of indicator used in an acid-base...Ch. 16 - Referring to Table 16.1, specify which indicator...Ch. 16 - A student carried out an acid-base titration by...Ch. 16 - The ionization constant Ka of an indicator HIn is...Ch. 16 - Use BaSO4 to distinguish between solubility, molar...Ch. 16 - Why do we usually not quote the Ksp values for...Ch. 16 - Write balanced equations and solubility product...Ch. 16 - Write the solubility product expression for the...Ch. 16 - How can we predict whether a precipitate will form...Ch. 16 - Silver chloride has a larger Ksp than silver...Ch. 16 - From the solubility data given, calculate the...Ch. 16 - The molar solubility of MnCO3 is 4.2 106 M. What...Ch. 16 - The solubility of an ionic compound MX (molar mass...Ch. 16 - The solubility of an ionic compound M2X3 (molar...Ch. 16 - Using data from Table 16.2, calculate the molar...Ch. 16 - Prob. 16.59QPCh. 16 - The pH of a saturated solution of a metal...Ch. 16 - If 20.0 mL of 0.10 M Ba(NO3)2 are added to 50.0 mL...Ch. 16 - A volume of 75 mL of 0.060 M NaF is mixed with 25...Ch. 16 - Solid NaI is slowly added to a solution that is...Ch. 16 - Find the approximate pH range suitable for the...Ch. 16 - How does the common ion effect influence...Ch. 16 - Prob. 16.66QPCh. 16 - How many grams of CaCO3 will dissolve in 3.0 102...Ch. 16 - The solubility product of PbBr2 is 8.9 106....Ch. 16 - Calculate the molar solubility of AgCl in a 1.00-L...Ch. 16 - Calculate the molar solubility of BaSO4 (a) in...Ch. 16 - Prob. 16.71QPCh. 16 - Which of the following will be more soluble in...Ch. 16 - Prob. 16.73QPCh. 16 - Calculate the molar solubility of Fe(OH)2 in a...Ch. 16 - The solubility product of Mg(OH)2 is 1.2 1011....Ch. 16 - Calculate whether or not a precipitate will form...Ch. 16 - If 2.50 g of CuSO4 are dissolved in 9.0 102 mL of...Ch. 16 - Calculate the concentrations of Cd2+, Cd(CN3)42,...Ch. 16 - If NaOH is added to 0.010 M Al3+, which will be...Ch. 16 - Calculate the molar solubility of AgI in a 1.0 M...Ch. 16 - Both Ag+ and Zn2+ form complex ions with NH3....Ch. 16 - Explain, with balanced ionic equations, why (a)...Ch. 16 - Outline the general procedure of qualitative...Ch. 16 - Give two examples of metal ions in each group (1...Ch. 16 - In a group 1 analysis, a student obtained a...Ch. 16 - In a group 1 analysis, a student adds HCl acid to...Ch. 16 - Both KCl and NH4Cl are white solids. Suggest one...Ch. 16 - Describe a simple test that would enable you to...Ch. 16 - To act as an effective buffer, the concentrations...Ch. 16 - The pKa of the indicator methyl orange is 3.46....Ch. 16 - The iodide impurity in a 4.50-g sample of a metal...Ch. 16 - A sodium acetate-acetic acid buffer solution was...Ch. 16 - Prob. 16.95QPCh. 16 - A 200-mL volume of NaOH solution was added to 400...Ch. 16 - The pKa of butyric acid (HBut) is 4.7. Calculate...Ch. 16 - A solution is made by mixing 5.00 102 mL of 0.167...Ch. 16 - Cd(OH)2 is an insoluble compound. It dissolves in...Ch. 16 - A student mixes 50.0 mL of 1.00 M Ba(OH)2 with...Ch. 16 - For which of the following reactions is the...Ch. 16 - A 2.0-L kettle contains 116 g of boiler scale...Ch. 16 - Equal volumes of 0.12 M AgNO3 and 0.14 M ZnCl2...Ch. 16 - Prob. 16.104QPCh. 16 - Prob. 16.105QPCh. 16 - A volume of 25.0 mL of 0.100 M HCl is titrated...Ch. 16 - The molar solubility of Pb(IO3)2 in a 0.10 M NaIO3...Ch. 16 - When a KI solution was added to a solution of...Ch. 16 - Barium is a toxic substance that can seriously...Ch. 16 - Prob. 16.110QPCh. 16 - Solid NaBr is slowly added to a solution that is...Ch. 16 - Cacodylic acid is (CH3)2AsO2H. Its ionization...Ch. 16 - Radiochemical techniques are useful in estimating...Ch. 16 - The molar mass of a certain metal carbonate, MCO3,...Ch. 16 - Acid-base reactions usually go to completion....Ch. 16 - Calculate x, which is the number of molecules of...Ch. 16 - Describe how you would prepare a 1-L 0.20 M...Ch. 16 - Prob. 16.118QPCh. 16 - Prob. 16.119QPCh. 16 - What reagents would you employ to separate the...Ch. 16 - Look up the Ksp values for BaSO4 and SrSO4 in...Ch. 16 - In principle, amphoteric oxides, such as Al2O3 and...Ch. 16 - Prob. 16.123QPCh. 16 - When lemon juice is squirted into tea, the color...Ch. 16 - How many milliliters of 1.0 M NaOH must be added...Ch. 16 - The maximum allowable concentration of Pb2+ ions...Ch. 16 - Which of the following solutions has the highest...Ch. 16 - Prob. 16.129QPCh. 16 - Water containing Ca2+ and Mg2+ ions is called hard...Ch. 16 - Prob. 16.131QPCh. 16 - Prob. 16.132QPCh. 16 - (a) Referring to Figure 16.6, describe how you...Ch. 16 - Prob. 16.135QPCh. 16 - One way to distinguish a buffer solution with an...Ch. 16 - Prob. 16.137QPCh. 16 - A sample of 0.96 L of HCl at 372 mmHg and 22C is...Ch. 16 - (a) Assuming complete dissociation and no ion-pair...Ch. 16 - Calculate the maximum mass (in grams) of each of...Ch. 16 - A 1.0-L saturated silver carbonate solution at 5C...Ch. 16 - The two curves shown represent the titration of...Ch. 16 - Prob. 16.143QPCh. 16 - A 100-mL 0.100 M CuSO4 solution is mixed with a...Ch. 16 - The titration curve shown represents the titration...Ch. 16 - The titration curve shown represents the titration...Ch. 16 - Use appropriate equations to account for the...Ch. 16 - Prob. 16.148IMECh. 16 - Aspirin is a weak acid with pKa = 3.5. What is the...
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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
- Identify the buffer system(s)the conjugate acidbase pair(s)present in a solution that contains equal molar amounts of the following: a. HF, KC2H3O2, NaC2H3O2, and NaF b. HNO3, NaOH, H3PO4, and NaH2PO4arrow_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_forwardA substance that functions to prevent rapid, drastic changes in the pH of a body fluid by changing strong acids and bases into weak acids and bases is called an: a.salt. b.buffer. c.enzyme. d.coenzyme.arrow_forward
- Ammonia gas is bubbled into 275 mL of water to make an aqueous solution of ammonia. To prepare a buffer with a pH of 9.56, 15.0 g of NH4Cl are added. How many liters of NH3; at 25C and 0.981 atm should be used to prepare the buffer? Assume no volume changes and ignore the vapor pressure of water.arrow_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_forwardOne way to distinguish a buffer solution with an acid solution is by dilution. (a) consider a buffer solution made of a 0.5 M CH3COOH and 0.5 M CH3COONa. Calculate its pH and the pH after it has been diluted 10-fold. (b) compare the result in (a) with the pHs of a 0.5M CH3COOH solution before and after it has been diluted 10-fold.arrow_forward
- Which of the following combination of solutions will form a buffer solution? (A) 50.0 mL of 0.20 M NH3 + 50.0 mL of 0.10 M HCl; (B) 50.0 mL of 0.20 M NH3 + 50.0 mL of 0.10 M NaOH; (C) 50.0 mL of 0.20 M HCl + 50.0 mL of 0.10 M NH3; (D) 50.0 mL of 0.20 M NaOH + 50.0 mL of 0.10 M HCl.arrow_forwardGiven the Kb's of three weak bases and the Ka's of two weak acids choose the one that could be used as one of the components of a buffer solution with a pH of 6.35. 1. CH3COOH (Ka = 1.8 x 10–5) 2. NH2OH (Kb = 1.1 x 10–8) 3. CH3NH2 (Kb = 4.4 x 10–4) 4. C5H5N (Kb = 1.7 x 10–9) 5. HCOOH (Ka = 1.8 x 10–4)arrow_forwarda)What is the pH of a mixture of 0.042 M NaH2PO4 and 0.058 M Na2HPO4? (b) If 1.0 mL of 10.0 M NaOH is added to a liter of the buffer prepared in (a),how much will the pH change? (c) If 1.0 mL of 10.0 M NaOH is added to a liter of pure water at pH 7.0, whatis the final pH? Compare this with the answer in (b).arrow_forward
- 11 (a) Define a buffer solution (b) What are the components of (1) an acidic buffer 2 (ii) a basic buffer ? (b) Using the equation below, explain what happens to maintain the pH of the solution: + A C Hw HA (9) when an acid is added (1) when a base is added (ii) (iii) Give one example each of a buffer in both living and non-living systemsarrow_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_forwardWhy does buffer capacity increase as the concentration of buffer increases?arrow_forward
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