{"id":232,"date":"2017-06-20T20:17:11","date_gmt":"2017-06-20T20:17:11","guid":{"rendered":"https:\/\/courses.lumenlearning.com\/chemistry2labs\/?post_type=chapter&p=232"},"modified":"2017-06-20T20:17:11","modified_gmt":"2017-06-20T20:17:11","slug":"lab-9-instructor-notes","status":"publish","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/chemistry2labs\/chapter\/lab-9-instructor-notes\/","title":{"raw":"Lab 9 Instructor Notes","rendered":"Lab 9 Instructor Notes"},"content":{"raw":"

Reading and Assignments<\/h3>\r\nThis week's lab is based on the equilibrium expressions for weak acids and bases.\u00a0 Students will use a series of solutions to determine the [H+<\/sup>], [OH-<\/sup>], pH, POH and K.\u00a0\u00a0\u00a0Students should be able to see that the K value for a compound does NOT change while the ion concentration values DO change.\r\n
\r\n
\r\n\r\nObjectives:\u00a0 After completing this week's assignments you will be able to:\r\n
    \r\n \t
  • Determine the pH and pOH for a solution of a weak acid or weak base.<\/li>\r\n \t
  • Calculate the [H+<\/sup>] in a solution.<\/li>\r\n \t
  • Determine the value of weak acids and base equilibrium constants (Ka<\/sub>\u00a0and Kb<\/sub>)<\/li>\r\n \t
  • Compare if or how the [H+<\/sup>] and Ka\u00a0<\/sub>values change with weak acid concentration.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
    Assignment<\/strong><\/td>\r\nApproximate Time to Complete<\/strong><\/td>\r\nDue Date<\/strong><\/td>\r\n<\/tr>\r\n
    Read over Lab Handout\r\n\r\n*This MUST be printed and brought to class.<\/td>\r\n15 minutes<\/td>\r\nBefore Lab<\/td>\r\n<\/tr>\r\n
    View\u00a0Prelab\u00a0Video (Optional)<\/td>\r\n30 minutes<\/td>\r\nBefore Lab<\/td>\r\n<\/tr>\r\n
    Complete\u00a0Prelab\u00a0Quiz<\/td>\r\n20 minutes<\/td>\r\nBefore Lab<\/td>\r\n<\/tr>\r\n
    Complete Data and Obtain Signature<\/td>\r\nCompleted In Class<\/td>\r\nIn Class<\/td>\r\n<\/tr>\r\n
    Complete\u00a0Postlab\u00a0Quiz<\/td>\r\n15 minutes<\/td>\r\nBefore Next Lab Meeting<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n*Prelab\u00a0assignments must be completed prior to coming to lab for a student to be admitted to class.\r\n\r\n<\/div>\r\n<\/div>","rendered":"

    Reading and Assignments<\/h3>\n

    This week’s lab is based on the equilibrium expressions for weak acids and bases.\u00a0 Students will use a series of solutions to determine the [H+<\/sup>], [OH–<\/sup>], pH, POH and K.\u00a0\u00a0\u00a0Students should be able to see that the K value for a compound does NOT change while the ion concentration values DO change.<\/p>\n

    \n
    \n

    Objectives:\u00a0 After completing this week’s assignments you will be able to:<\/p>\n

      \n
    • Determine the pH and pOH for a solution of a weak acid or weak base.<\/li>\n
    • Calculate the [H+<\/sup>] in a solution.<\/li>\n
    • Determine the value of weak acids and base equilibrium constants (Ka<\/sub>\u00a0and Kb<\/sub>)<\/li>\n
    • Compare if or how the [H+<\/sup>] and Ka\u00a0<\/sub>values change with weak acid concentration.<\/li>\n<\/ul>\n\n\n\n\n\n\n\n\n
      Assignment<\/strong><\/td>\nApproximate Time to Complete<\/strong><\/td>\nDue Date<\/strong><\/td>\n<\/tr>\n
      Read over Lab Handout<\/p>\n

      *This MUST be printed and brought to class.<\/td>\n

      		15 minutes<\/td>\nBefore Lab<\/td>\n<\/tr>\n
      View\u00a0Prelab\u00a0Video (Optional)<\/td>\n30 minutes<\/td>\nBefore Lab<\/td>\n<\/tr>\n
      Complete\u00a0Prelab\u00a0Quiz<\/td>\n20 minutes<\/td>\nBefore Lab<\/td>\n<\/tr>\n
      Complete Data and Obtain Signature<\/td>\nCompleted In Class<\/td>\nIn Class<\/td>\n<\/tr>\n
      Complete\u00a0Postlab\u00a0Quiz<\/td>\n15 minutes<\/td>\nBefore Next Lab Meeting<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      *Prelab\u00a0assignments must be completed prior to coming to lab for a student to be admitted to class.<\/p>\n<\/div>\n<\/div>\n","protected":false},"author":23588,"menu_order":1,"template":"","meta":{"_candela_citation":"[]","CANDELA_OUTCOMES_GUID":"","pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-232","chapter","type-chapter","status-publish","hentry"],"part":27,"_links":{"self":[{"href":"https:\/\/courses.lumenlearning.com\/chemistry2labs\/wp-json\/pressbooks\/v2\/chapters\/232","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/courses.lumenlearning.com\/chemistry2labs\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/courses.lumenlearning.com\/chemistry2labs\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/chemistry2labs\/wp-json\/wp\/v2\/users\/23588"}],"version-history":[{"count":1,"href":"https:\/\/courses.lumenlearning.com\/chemistry2labs\/wp-json\/pressbooks\/v2\/chapters\/232\/revisions"}],"predecessor-version":[{"id":233,"href":"https:\/\/courses.lumenlearning.com\/chemistry2labs\/wp-json\/pressbooks\/v2\/chapters\/232\/revisions\/233"}],"part":[{"href":"https:\/\/courses.lumenlearning.com\/chemistry2labs\/wp-json\/pressbooks\/v2\/parts\/27"}],"metadata":[{"href":"https:\/\/courses.lumenlearning.com\/chemistry2labs\/wp-json\/pressbooks\/v2\/chapters\/232\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/courses.lumenlearning.com\/chemistry2labs\/wp-json\/wp\/v2\/media?parent=232"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/chemistry2labs\/wp-json\/pressbooks\/v2\/chapter-type?post=232"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/chemistry2labs\/wp-json\/wp\/v2\/contributor?post=232"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/chemistry2labs\/wp-json\/wp\/v2\/license?post=232"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}