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LARN 155 C39D3

Start the following in class:

1.  Write your journal entry on sheets of three holed 8.5 inch by 11 inch ruled paper in your Journal notebook. In the upper right corner white space of each upward facing page, write your hand in number within a circle followed by your name. Each journal entry should either be at least a paragraph of exemplary writing and penmanship concerning a single topic, or be a concept map relating chemistry terms. Begin each day’s paragraph with a topic sentence, follow with explained instances, and close with a focused summary statement.  Rather than just to find answers to questions, the goal of journaling is to reflect on, synthesize, and clearly express your thoughts in statements of your own understanding, so do not paraphrase material from other sources that you do not understand.

a. The first required focus topic, J155A, for today area.

a.  How are the [H+(aq)] and the [OH–(aq)] related in aqueous solutions?

b.  How can the [OH–(aq)] corresponding to a given [H+(aq)] in an aqueous solution be calculated?

c.  How can the [H+(aq)] corresponding to a given [OH–(aq)] in an aqueous solution be calculated?

d.  How does one classify a solution as acidic, neutral, or basic, given either the aqueous hydrogen ion concentration in moles of H+ per liter of solution or the aqueous hydroxide ion concentration in moles of OH– per liter of solution?

e.  What is an acid-base indicator and what is it used for?

f.   How can the [H+(aq)] in an aqueous solution be converted to a pH value?

        g.  How does one convert a pH value to a [H+(aq)] value?  

h.  How can the [OH–(aq)] in an aqueous solution be converted to a pOH value? 

i.  How does one convert a pOH value to an [OH–(aq)] value?  

 j.  How are pH and pOH values related in aqueous solutions?

2.b.  The second required learning journal assignment, J155B, for today is as follows.  Read pages R16 and R17 on the properties,and sources of the elements aluminum, and indium found in Group 13 (IIIA). On your learning journal page, record the answers to these three questions:

a. What is the most interesting fact you read about?  Please make your response longer than one sentence.

b. What makes this so interesting to you?  Please make your response longer than one sentence.

c.What is one use for one of the aforementioned nonmetals that you either were not familiar with or were least familiar with?  Please make your response longer than one sentence.

2.a. Use the PQ5R or SQ5R method to prepare study guide for text section 19.2 on Hydrogen Ions and Acidity or go to https://socratic.org/chemistry  to research the topics brought up in section 19.2 of your text.  Read section 19.2 in your chemistry text, pages 594 through 604, and as you do, create a study guide using the SQ5R or PQ5R method explained in class and on the distributed handout packet. You may record vocabulary entries in the body of your study guide, or you may check them off on the chapter 19 vocabulary list that was distributed as you think about the meanings of the terms and add any notations to the vocabulary list for clarifications sake.

2.b.  After you have finished reading the assigned section of the chapter, answer the formative assessment questions and do some formative assessment problems to inform you about the degree of your comprehension and understanding.  Assessment questions are printed at the end of the section that you have just read.  Reflect on your answers to assure yourself that you have understood the major points in the section that you have just read.  Record your responses to questions that are challenging you, so that you can later review what you are learning.  If all problems seem easy to you, record the response to the problem that was least easy for you to answer.

Writing in blue or black ink, place your hand in number in a circle followed by your name in the upper right white space of a piece of three holed composition paper that hasn’t been written on.  Place the page reference for the problems to be considered to the left of the red marginal line on the first blue line.  Centered on the first blue line, write a descriptive title for the learning activity such as Section C1.4 Responses where C1.4 represents Chapter1.section4.  Before you write your response to each question or problem listed below, write its designation to the left of the red marginal line as listed below, followed by your response in ink to the right of the marginal line.

If solving the problem entails the use of multiplication or division, show your work by including a ? followed by the unit of the quantity you are solving for, an = sign, followed by the quantity given that has all or part of the dimensions of whatever quantity you are solving for, followed by mathematical operations on all labeled quantities, conversion ratios or comparison ratios that are used to obtain the sought for quantity.

  • Study Sample Problem 19.1 on page 596 which shows how to calculate the concentration of hydroxide ion present in an aqueous solution of known aqueous hydrogen ion concentration solution at 25.0 °C using the relation [H+(aq)]eq · [OH–(aq)]eq = 1.00 x 10-14.
  • After studying Sample Problem 19.1, read, analyze, describe and explain practice problem I9-9abcd (In chapter 19, problem 9abcd) and thendo and show your work for practice problem I19-10ab.
  • Study pages 596 and 597 and review how to convert aqueous hydrogen ion concentration to pH using the relation pH = -log10[H+(aq)] and.to convert pH to aqueous hydrogen ion concentration using the relation [H+(aq)] = 1.00 x 10-pH.
  • Study Sample Problem 19.2 on page 599 which shows howto calculate the pH of an aqueous solution of known aqueous hydrogen ion concentration solution. Then do and show your work for practice problems I19-11ab and I19-12ab.
  • Study Sample Problem 19.3 on page 600, do and show your work for practice problems I19-13ab and I19-14ab.
  • Study Sample Problem 19.4 on page 601, do and show your work for practice problems I19-15ab and I19-16ab.
  • In the Section Assessment 19.2 on page 604, read, analyze, describe and explain practice problems I19-17 (In chapter 19, problem 17), I19-18abc, I19-19, and do and show work for practice problems I19-20abcd, and I19-21abc.

After you have finished responding to the formative assessment questions and problems, check pages R98 and R99 of the text and check each of those problems that you can by writing in either a check mark (√) or a correction in green ink.  Write down any question that you still have so that you can ask about it in class.  In the margin of your notebook page, circle the number of formative assessment questions do not have a suggested response given and check your response with that of your classmates when you come to class.

3.  Go to the web site at http://www.visionlearning.com/reg/login.php, log on into the course+section for which you are registered, and select the module entitled Acids and Bases.  Read this module as if you were creating an SQ5R or PQ5R study guide for it, but are title it: Acids and Bases.  Click on the Notes menu item next to the Acids and Bases menu item and read and follow the full instructions for what you need to do.  When you are finished, click on the Questions module menu item on the left side of the screen, then on the Quizzes tab at the top of the module, click on the Acids and Bases title, select the best choice response to all the quiz questions, and then click on the Score Quiz button.  Then examine the feedback on your quiz and reread and study the material pertaining to any items identified as incorrect.  Reflect on your responses and retake the quiz as many times as you need for you to fully understand and from that understanding, score well on the quiz.

Recommended for those who have time left in their 45 minute study period, but not required of all:

  1. How do the properties of covalent molecular substances with hydrogen bonding typically differ from those covalent molecular substances that form molecules whose van der Waals attractive forces only weakly attract other molecules?
  2. Think about the sixteen properties of covalent molecular substances listed on the Properties to be understood worksheet describing differences in the properties of metals, ionic compounds, covalent network solids, and covalent molecular compounds.  Continue to study this handout for understanding and review how the typical properties of members of these classes of compounds depend on whether the compound has localized or delocalized electrons, and upon whether strong metallic, ionic, or covalent bonding or weak van der Waals forces of attraction are predominant between representative particles of the substances.  Try to understand how each property of a given covalent molecular substance is related to the groups of covalently bonded atoms that form molecules whose van der Waals attractive forces only weakly attract other molecules.