by horse Comment Closed

LARN 096 C24D4

Start the following in class:

1. Do all the pages in the chapter 11 Formative Test on Chemical Reactions as a formative assessment to find out some of the things that you do and do not know, and not as a research project.

  • If you did not obtain a formative test packet for the chapter in class, go to MNSD Google Drive > Student Resources > Formative Tests and print off a copy of the test for the chapter you are studying.  Each chapter test is identified by a name whose last two digits is the chapter number.  When you open the chapter formative test the first page will have the words “Chapter Test A” in the title.
  • For each question or problem challenge, either answer the question to the best of your ability using one or more full sentences, or answer the problem to the best of your ability by recording any numbers and units together with the mathematical operations performed in symbolic terms, along with the solution to the problem which should be circled.
  • For formative test p.279, #26a, 26b, and 26c; and p.280 #28a and b, and #29a and 29b, use the T-checks taught in class and explained on the first page of the chapter 11 informational handout to demonstrate that the expressions given are indeed balanced.
  • After doing the formative test, but before you demonstrate your understanding on our class’ chapter test, you will check all your responses using green ink check marks √ for each correct response, and by lining out (striking trough) and inserting improved text in green ink when you think the suggested response expresses your present understanding in a better way.    In that way make sure that you understand each idea that you originally did not have a complete understanding of.  Then you will be able to study more efficiently by studying that which you corrected in green ink.

2.  You are to do a simulation of a laboratory experience in which one mixes an aqueous silver nitrate solution with four other aqueous solutions.  Your purpose in doing this activity is to determine which combinations of aqueous solutions result in a precipitate forming in simulation. For each simulated mixing process, you are to record the simulated chemical behavior of each pair of mixed aqueous solutions in your bound Laboratory Notebook.  In this simulation a drop of an aqueous solution of silver nitrate is added to a small portion of aqueous solutions of four other substances, one at a time.  

This simulation is entitled Chemical Reactions Precipitate Laboratory simulation and it is a ChemThink application that is not on the ChemThink log on site.  Because the Flash is no longer supported by the Firefox browser, nor the Chrome browser, nor the Opera browser, use either the Edge or the Internet Explorer 11 browser to run the Chemical Reactions Precipitate Laboratory Flash simulation.  Typically you will have to click one or two popups at the upper right of your display and then, also click the icon in the center of your display to start the Flash simulation. An alternate option is to use an ‘Internet Explorer mode’ of browsing in the previously mentioned browsers or in the Edge browser as explained online at https://www.digitalcitizen.life/how-enable-java-all-major-web-browsers.  If you have a MAC computer, to run Flash on Safari, check the Internet Plugins: Allow Plug-ins check box, and then install the Flash plug-in.  Chromebooks cannot run this software, so if you have a Chromebook, please schedule some time in the library or after school in room A235 to use a PC computer that has Edge or Internet Explorer 11 installed on it.

a. Start up the Internet Explorer browser and go to this web site, www.mrchemistry.org.

b. Click on this non-log on ChemThink web site https://www.simbucket.com/welcome-to-simbucket/ .

c. On the web page that is displayed, click on the “Run simulation” button to load the ChemThink Precipitates Laboratory Simulation. 

d. After reading the introduction to the simulation that now displays, click on the green Start triangular shaped button. Note that to proceed to the next laboratory simulation frame you need to move pipet of silver nitrate above one of the four solutions being tested and double click the pipet bulb, or move the green slider at the bottom right all the way to the right and leave it there so that the green arrow icon for the next frame of instruction appears at the left bottom portion of the display.  Carefully follow the instructions and study the animated diagrams representing the ionic substance, positive and negative ions, and water molecules to learn how they interact as ions.  Also note that what is called a molecular equation in this laboratory simulation and by many textbook authors is what we more accurately term a formula unit expression. Take Cornell notes on anything that gives  you difficulty during your attempts at working through each page of the online tutorial.  Focus on understanding why the correct answer to each problem posed is what it is. Your goal is to have a deep enough understanding to advance to the following page. If you do not attain that level of understanding, review some more, analyze some more, and try again until you succeed.

    1. In your bound Laboratory Notebook set up an Observations page for this laboratory simulation and label it “Simulated Observations”.  As you work your way through the simulated laboratory experiences, record the identity of the initial solutions that are mixed and, after their simulated mixing, whether a precipitate does or does not form on the Observations page.
    2. In your bound Laboratory Notebook, summarize your conceptual understanding of the simulated chemical behavior in a Summary of Chemical Processes OccurringUnder that heading, for each of the four pairs of aqueous solutions that are mixed, write,
      1. the complete ionic equation for the process that occurred upon mixing,
      2. the net ionic equation, if any, and
      3. the balanced formula unit expression, if applicable.
    3. If you do not have a copy of the two page worksheet that goes with this module, click on thisChemThink worksheet link for this module or, if that doesn’t work, locate it in the Student Resources > Handouts > ChemThink Formative Assessment Note Sheets Download the worksheet, and print off a copy.
      1. Place your hand in number and name in ink in the upper right corner of the worksheet pages.
      2. Change the words “molecular equation” to formula unit equation” in the third question on page 2 of the worksheet for this simulation. Record a response to each question asked on the worksheet for this laboratory simulation.
    4. When you have completed studying the simulations, reflect upon the understanding that you have built up by doing the laboratory simulation and record what you have learned in your Learning Log under the heading of Reflections.  As you reflect upon what was happening, if you realize that you are still unclear on some points, carefully run the laboratory animations again, and make sure that you understand what each action of the labeled particles in the animations represents.
    5. Bring your Laboratory Notebook, the filled in worksheet and Learning Log to class.

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

1.  In your Journal Notebook write your journal entry on sheets of three holed 8.5 inch by 11 inch ruled paper.

  • In the upper right corner white space of each upward facing page, use a blue or black pen to write your hand in number within a circle followed by your name.
  • To the left of the marginal line, print J96 and circle it.

For your journal entry J96, you are to construct a concept map.  Please turn to page 346 in your text and, in your learning journal, construct a concept map relating the five (5) terms listed at the bottom of the page.  Connect related terms with arrows such that the subject of each sentence explaining the relationship is at the tail of the arrow, the verb describing the relationship of the subject to the predicate is written beside the arrow, and the arrow head is touching the oval of the term which is the object or predicate nominative of the verb that you have chosen.