and PbOH 2 Type c salt ions Cl Type d PbCl Make sure to write the equilibrium

And pboh 2 type c salt ions cl type d pbcl make sure

• 7

This preview shows page 2 - 5 out of 7 pages.

+ , and Pb(OH) 0 2 Type c : salt ions: Cl - Type d : PbCl + (Make sure to write the equilibrium equation for this d- species. [See last equation in the Table below, corresponding to K 4 ]. Since we have 9 unknowns at equilibrium, we will need a total of 9 equations. 2

Subscribe to view the full document.

Step-2 : Write the relevant equilibrium equations and constants H 2 O ↔ H + + OH - K w = {H + }{OH - } = 10 -14.0 Eq.1. CH 3 COOH CH 3 COO - + H+ ¿ C H 3 COO ¿ ¿ ¿ K 1 = ¿ Eq.2. Pb 2+ + OH - Pb(OH)+ 2 + ¿ Pb ¿ ¿ ¿ { Pb ( OH ) + ¿ } ¿ K 2 = ¿ Eq.3. Pb(OH) + + OH - Pb(OH) 2 0 + ¿ }{ OH ¿ } { Pb ( OH ) ¿ K 3 = { Pb ( OH ) 2 0 } ¿ Eq.4. Pb 2+ + Cl - PbCl + 2 + ¿ Pb ¿ ¿ ¿ { PbCl + ¿ } ¿ K 4 = ¿ Eq.5 . 3
Step-3 : Write a mass balance (MB) on each ion type other than H + and OH - . Define an ion type as any ion or molecule in its most dissociated form (e.g. Na + , Cl - , Cu 2+ , NH 3 0 ). In contrast, neutrally charged compounds and ions that can still undergo dissociation ( CuCO 3 0 , NH 4 + , HCO 3 - , etc.) are not ion types . Additionally, OH - and H + are not included here as they appear separately as type species . Finally, the number of ions for a given system is equal to the number of weak acid/base systems (i.e. groups of type b species ) plus the number of type c species Ion Types initialconditions ( c i n iA ) = equilibriumconditions ( c i n iA ) Where A is an ion type, c i is the conc. which contains ion type A, and n A = number of A groups in each molecule of species i Eq # CH 3 COO - (3*10 -3 )(2) = {CH 3 COO - }(1) + {CH 3 COOH}(1) 6

Subscribe to view the full document.

• Fall '08
• Chemistry, #, Electric charge, 0.02 m, 0.020 M, 0.013 m

What students are saying

• 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.

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

• 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.

Dana University of Pennsylvania ‘17, Course Hero Intern

• 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.

Jill Tulane University ‘16, Course Hero Intern

Ask Expert Tutors You can ask 0 bonus questions You can ask 0 questions (0 expire soon) You can ask 0 questions (will expire )
Answers in as fast as 15 minutes