Gen Chem 2 Chapter 18 Part 1 (Acid-Base Equilibria)Tavss Review Questions

A nano 3 na h 2 o nr no 3 h 2 o nr neutral b nano 2

Info icon This preview shows pages 106–111. Sign up to view the full content.

a. NaNO 3 Na + + H 2 O NR NO 3 - + H 2 O NR Neutral b. NaNO 2 Na + + H 2 O NR NO 2 - + H 2 O HNO 2 + OH - Therefore, basic solution c. C 5 H 5 NHClO 4 ClO 4 - + H 2 O NR C 5 H 5 NH + + H 2 O C 5 H 5 N + H 3 O + Therefore, acidic solution CHEM162-2003 5 TH WEEK RECITATION CHAPTER 14 - ACID AND BASE EQUILIBRIA SALT EQUILIBRIA CONCEPTS/CALCULATIONS 115 Are solutions of the following salts acidic, basic, or neutral? a. NaNO 3 Na + + H 2 O NR NO 3 - + H 2 O NR Neutral
Image of page 106

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

1481 b. NaNO 2 Na + + H 2 O NR NO 2 - + H 2 O HNO 2 + OH - Therefore, basic solution c. C 5 H 5 NHClO 4 ClO 4 - + H 2 O NR C 5 H 5 NH + + H 2 O C 5 H 5 N + H 3 O + Therefore, acidic solution CHEM162-2003 6 TH WEEK RECITATION-2 CHAPTER 14 - ACID AND BASE EQUILIBRIA SALT EQUILIBRIA CONCEPTS/CALCULATIONS 95 Which of the substances in Exercises 85 and 86 show increased solubility as the pH of the solution becomes more acidic? Write equations for the reactions that occur to increase the solubility. Ag 3 PO 4 , CaCO 3 , Hg 2 Cl 2 , PbI 2 , CdCO 3 , Sr 3 (PO 4 ) 2 Answer: Ag 3 PO 4 , CaCO 3 , CdCO 3 , Sr 3 (PO 4 ) 2 e.g., Ag 3 PO 4 3Ag + + PO 4 3- PO 4 3- + H + HPO 4 2 Le Chatelier principle: Increased Ag 3 PO 4 solubility.
Image of page 107
1482 e.g., PbI 2 Pb 2+ + 2I - I - + H + NR Le Chatelier principle: No change in PbI 2 solubility. CHEM162-2003 6 TH WEEK RECITATION-2 CHAPTER 14 - ACID AND BASE EQUILIBRIA SALT EQUILIBRIA CONCEPTS/CALCULATIONS 95 Which of the substances in Exercises 85 and 86 show increased solubility as the pH of the solution becomes more acidic? Write equations for the reactions that occur to increase the solubility. Ag 3 PO 4 , CaCO 3 , Hg 2 Cl 2 , PbI 2 , CdCO 3 , Sr 3 (PO 4 ) 2 Answer: Ag 3 PO 4 , CaCO 3 , CdCO 3 , Sr 3 (PO 4 ) 2 e.g., Ag 3 PO 4 3Ag + + PO 4 3- PO 4 3- + H + HPO 4 2 Le Chatelier principle: Increased Ag 3 PO 4 solubility. e.g., PbI 2 Pb 2+ + 2I - I - + H + NR Le Chatelier principle: No change in PbI 2 solubility. CHEM162-2003 5 TH WEEK RECITATION CHAPTER 14 - ACID AND BASE EQUILIBRIA SALT EQUILIBRIA CONCEPTS/CALCULATIONS 15.23 Calculate the pH of each of the following solutions.
Image of page 108

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

1483 b. 0.100 M sodium propanoate (NaC 3 H 5 O 2 ) (HC 3 H 5 O 2 , K a = 1.3 x 10 -5 ) (b) P - + H 2 O HP + OH - P - HP OH - Initial 0.100 0 0 Change -X +X +X Equilibrium 0.100 - X +X +X X 2 /(0.100 - X) = (1 x 10 -14 )/(1.3 x 10 -5 ) X = 8.77 x 10 -6 pOH = -log 8.77 x 10 -6 pH = 14.00 - 5.06 = 8.94 CHEM162-2003 5 TH WEEK RECITATION CHAPTER 14 - ACID AND BASE EQUILIBRIA SALT EQUILIBRIA CONCEPTS/CALCULATIONS 115 Are solutions of the following salts acidic, basic, or neutral? a. NaNO 3 Na + + H 2 O NR NO 3 - + H 2 O NR Neutral b. NaNO 2 Na + + H 2 O NR NO 2 - + H 2 O HNO 2 + OH - Therefore, basic solution
Image of page 109
1484 c. C 5 H 5 NHClO 4 ClO 4 - + H 2 O NR C 5 H 5 NH + + H 2 O C 5 H 5 N + H 3 O + Therefore, acidic solution 7. CHEM162-2000 HOURLY EXAM II CHAPTER 14 - ACID AND BASE EQUILIBRIA SALT EQUILIBRIA CONCEPTS/CALCULATIONS Place the following 0.10 M aqueous solutions in order of increasing pH (from lowest pH to highest pH) NaCl NH 4 Cl NaCH 3 COO A . NH 4 Cl < NaCl < NaCH 3 COO B. NaCl < NH 4 Cl < NaCH 3 COO C. NaCH 3 COO < NaCl < NH 4 Cl D. NH 4 Cl < NaCH 3 COO < NaCl E. NaCH 3 COO < NH 4 Cl < NaCl 7. CHEM162-2001 HOURLY EXAM II + ANSWERS CHAPTER 14 - ACID AND BASE EQUILIBRIA SALT EQUILIBRIA CONCEPTS/CALCULATIONS 0.100 mol of each of the following substances is dissolved in enough water to make
Image of page 110

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 111
This is the end of the preview. Sign up to access the rest of the document.
  • Fall '07
  • Zbaida
  • pH, Acids, Lewis acid, Base Equilibria

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern