CHEMISTRY-TEXT
CHEMISTRY-TEXT
8th Edition
ISBN: 9780134856230
Author: Robinson
Publisher: PEARSON
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Chapter 17, Problem 17.59SP
Interpretation Introduction

Interpretation:

The concentration of the salt of weak acid strong base in a buffer solution.

Concept introduction:

  • Buffer solution:Aqueous solution of a salt of strong acid and strong base e.g. sodium chloride (NaCl), and salt of weak acid and a weak base e.g. ammonium chloride( NH4Cl ), both have a PH of 7. But the addition of 1 cm3 of 0.1MHCl to 1 dm3 of the solutions alters the PH to 4 in the case of former, while it hardly affects the PH of the latter. The addition of an equivalent quantity of NaOH would like wise change the PH of the NaCl solution from 7 to 10, but it would not appreciably alter that NH4Cl solution. The solution of NH4Cl thus has the property of resisting the change of PH

    when an acid or alkali is added to it and this property of solution is known as buffer action.

    In general, a buffer solution is one which is resistant to change of PH upon the addition of a small amount of acid or base. The buffer solutions usually contain relatively larger amount of a weak acid and salt of its conjugate base. The PH of the buffer solution is expressed by Henderson-Hasselbalch equation: PH=PKa+log[salt][acid]

Given:

The PH of a solution of HN3 and NaN3 is 4.86.
The acid dissociation constant of HN3 is 1.9×105 and the concentration is 0.016M.

To determine:

The molarity of NaN3 in the mixture of HN3 and NaN3.

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Chapter 17 Solutions

CHEMISTRY-TEXT

Ch. 17 - PRACTICE 16.12 How would you prepare anbuffer...Ch. 17 - APPLY 16.13 Suppose you are performing an...Ch. 17 - A 40.0 mL volume of 0.100 M HCl is titrated with...Ch. 17 - APPLY 16.15 A 40.0 mL volume of 0.100 M NaOH is...Ch. 17 - What is the pH at the equivalence point in the...Ch. 17 - The following pictures represent solutions at...Ch. 17 - Assume that 40.0 mL of 0.0800...Ch. 17 - Assume that 40.0 mL of a 0.0250 M solution of the...Ch. 17 - Write the equilibrium-constant expression for...Ch. 17 - The following pictures represent solutions of...Ch. 17 - Prob. 17.21PCh. 17 - Ca2, which causes clotting, is removed from...Ch. 17 - What is the molar solubility of Ag2CrO4 in water...Ch. 17 - Prior to having an X-ray exam of the upper...Ch. 17 - Calculate the molar solubility of MgF2 , in...Ch. 17 - Calculate the molar solubility of Zn(OH)2 , in a...Ch. 17 - In an excess of NH3(aq),Cu2+ ion forms a deep blue...Ch. 17 - Cyanide ion is used in gold mining because it...Ch. 17 - Prob. 17.29PCh. 17 - Prob. 17.30ACh. 17 - Prob. 17.31PCh. 17 - Will a precipitate form on mixing 25 m1 of...Ch. 17 - Prob. 17.33PCh. 17 - Prob. 17.34PCh. 17 - HCO3 And CO32 are the primary ions in the ocean...Ch. 17 - Coral and the shells of marine organisms are made...Ch. 17 - The following reactions represent the dissolution...Ch. 17 - Prob. 17.38CPCh. 17 - The following pictures represent initial...Ch. 17 - Prob. 17.40CPCh. 17 - The following plot shows two pH titration curves,...Ch. 17 - Prob. 17.42CPCh. 17 - The following pictures represent solutions at...Ch. 17 - Prob. 17.44CPCh. 17 - Prob. 17.45CPCh. 17 - Prob. 17.46CPCh. 17 - 16.50 Is the pH greater than, equal to, or less...Ch. 17 - Is the pH greater than, equal to, or less than 7...Ch. 17 - Prob. 17.49SPCh. 17 - Prob. 17.50SPCh. 17 - Prob. 17.51SPCh. 17 - Prob. 17.52SPCh. 17 - 16.56 The equilibrium constant for the...Ch. 17 - 16.57 The equilibrium constant for the...Ch. 17 - 16.58 Does the pH increase, decrease, or remain...Ch. 17 - 16.59 Does the pH increase, decrease, or remain...Ch. 17 - 16.60 Calculate the pH of a solution that is 0.25...Ch. 17 - Prob. 17.58SPCh. 17 - Prob. 17.59SPCh. 17 - The pH of a solution of NH3 and NH4Br is 8.90....Ch. 17 - Prob. 17.61SPCh. 17 - Prob. 17.62SPCh. 17 - Prob. 17.63SPCh. 17 - Which of the following gives a buffer solution...Ch. 17 - Prob. 17.65SPCh. 17 - Prob. 17.66SPCh. 17 - Prob. 17.67SPCh. 17 - Calculate the pH of a buffer solution prepared by...Ch. 17 - Prob. 17.69SPCh. 17 - Calculate the pH of 0.375 L of a 0.18 M acetic...Ch. 17 - Prob. 17.71SPCh. 17 - A food chemist studying the formation of lactic...Ch. 17 - Prob. 17.73SPCh. 17 - Prob. 17.74SPCh. 17 - Prob. 17.75SPCh. 17 - Give a recipe for preparing a CH3CO2HCH3C02NA Na...Ch. 17 - Prob. 17.77SPCh. 17 - Prob. 17.78SPCh. 17 - Consider a buffer solution that contains equal...Ch. 17 - Calculate the concentrations of NH4+ and NH3 and...Ch. 17 - Prob. 17.81SPCh. 17 - Make a rough plot of pH versus milliliters of acid...Ch. 17 - Prob. 17.83SPCh. 17 - Consider the titration of 50.0 mL of 0.116 M NaOH...Ch. 17 - Prob. 17.85SPCh. 17 - Consider the titration of 25.0 mL of 0.200 MHCO2H...Ch. 17 - On the same graph, sketch pH titration curves for...Ch. 17 - Prob. 17.88SPCh. 17 - A 100.0 mL sample of 0.100 M methylamine (...Ch. 17 - A 50.0 mL sample of 0.250 M ammonia (...Ch. 17 - Prob. 17.91SPCh. 17 - Prob. 17.92SPCh. 17 - Prob. 17.93SPCh. 17 - What is the pH at the equivalence point for the...Ch. 17 - Consider the titration of 50.0 mL of a 0.100 M...Ch. 17 - Prob. 17.96SPCh. 17 - Prob. 17.97SPCh. 17 - The titration of 0.02500 L of a diprotic acid...Ch. 17 - Prob. 17.99SPCh. 17 - Prob. 17.100SPCh. 17 - Prob. 17.101SPCh. 17 - Prob. 17.102SPCh. 17 - Prob. 17.103SPCh. 17 - Prob. 17.104SPCh. 17 - Prob. 17.105SPCh. 17 - Use the following solubility data to calculate a...Ch. 17 - Prob. 17.107SPCh. 17 - Prob. 17.108SPCh. 17 - Prob. 17.109SPCh. 17 - Prob. 17.110SPCh. 17 - Prob. 17.111SPCh. 17 - Prob. 17.112SPCh. 17 - Which of the following compounds are more soluble...Ch. 17 - Prob. 17.114SPCh. 17 - Consider saturated solutions of the slightly...Ch. 17 - Prob. 17.116SPCh. 17 - Is the solubility of Zn(OH)2 , increased,...Ch. 17 - Is the solubility of Fe(OH)3 increased, decreased,...Ch. 17 - Prob. 17.119SPCh. 17 - Prob. 17.120SPCh. 17 - Prob. 17.121SPCh. 17 - Prob. 17.122SPCh. 17 - Prob. 17.123SPCh. 17 - Calculate the molar solubility of Cr(OH)3 in 0.50...Ch. 17 - Zinc hydroxide, Zn(OH)2 = (kSP=4.11017) , is...Ch. 17 - Prob. 17.126SPCh. 17 - Prob. 17.127SPCh. 17 - “Hard” water contains alkaline earth cations such...Ch. 17 - Prob. 17.129SPCh. 17 - Prob. 17.130SPCh. 17 - Prob. 17.131SPCh. 17 - Prob. 17.132SPCh. 17 - Prob. 17.133SPCh. 17 - Prob. 17.134SPCh. 17 - Prob. 17.135SPCh. 17 - Using the qualitative analysis flowchart in Figure...Ch. 17 - Give a method for separating the following pairs...Ch. 17 - Prob. 17.138SPCh. 17 - Prob. 17.139SPCh. 17 - Prob. 17.140MPCh. 17 - Calculate the molar solubility of MnS in a 0.30 M...Ch. 17 - Prob. 17.142MPCh. 17 - A 100.0 mL sample of a solution that is 0.100 M in...Ch. 17 - A 0.0100mol sample of solid Cd(OH)2(Ksp=5.31015)...Ch. 17 - One type of kidney stone is a precipitate of...Ch. 17 - Prob. 17.146MPCh. 17 - Ethylenediamine ( NH2CH2CH2NH2 , abbreviated en)...Ch. 17 - A 40.0 mL sample of a mixture of HCI and H3PO4 was...Ch. 17 - A 1.000 L sample of HCI gas at 25 °C and 732.0 mm...Ch. 17 - Prob. 17.150MPCh. 17 - Consider the reaction that occurs on mixing 50.0...Ch. 17 - In qualitative analysis, Ca2+ and Ba2+ are...Ch. 17 - A railroad tank car derails and spills 36 tons of...Ch. 17 - Some progressive hair coloring products marketed...
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