LARN 166 C42D2

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LARN 166 C42D2 Start the following in class: 1.  For the first part of today's journal entry, J166A, assign oxidation numbers to each single atom of each chemical species in chemical expressions a and b given below and then show how those oxidation numbers can be used to balance the chemical expressions.  A page in your learning packet has space for you to show your work for these two problems, or you can do problems a and b in your journal notebook. __ __                      __                             __ __                  __ a.  __ Fe2O3(s)     + __ C(s)       →        __ CO(g)     +  __  Fe(s)                      __ __                     __ __           ...
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LARN 165 C42D1

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LARN 165 C42D1 Your Goal: Your goal today should be to begin to learn the SINGLE ATOM RATIO method of balancing chemical expressions using oxidation numbers is explained with step by step examples on the ActivInspire flipchart for Oxidation and Reduction.  Reading section 20.3 and studying the change in oxidation number method will also add to your understanding.  [Please do NOT spend time reading or studying what your text calls the half reaction method and what other texts call the ion-electron method.  Wherever the text asks you to do an example using that method use the single atom ratio method instead!!]  To learn use any using oxidation numbers you will need to be able to assign the quickly and accurately so start out by reviewing the four rules and six priorities for assigning oxidation numbers assigned in LARN 163, and LARN 164.  Then move on to assigning oxidation numbers to each single atom in the assigned unbalanced chemical expressions and use one...
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LARN 164 C41D4

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LARN 164 C41D4 Your Goals: Reading section 20.2 should give you an idea of how oxidation numbers are assigned and why they are assigned in the way that they are.  The journal questions bring out the meanings discussed in the reading selection.  The time focused on the reading and journaling is expected to be around 30 minutes.  The main concern for home learning activities is to develop understandings in your mind that you can then apply to solve problems.   Responding to the journal questions serves as a first step toward accomplishing that purpose. With the understanding of why the priorities are as they are, the central focus of LARN 164 is to learn to apply the four rules and six priorities for assigning oxidation numbers introduced in LARN 163, with the ease that comes from practice.  Try spending no more than 10 minutes reviewing why the rules and priorities are as they are and follow up with applying those rules to the best...
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