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….beyond one scope of dieser course and the AP exam

January 11, 2013

I am available getting into the nitty-gritty of the new curriculum as I prepare may materials by a huge overhaul and re-write.

By general, exclusion statements are incredibly useful, and frankly should ALWAYS have been in the route description, BUT until we show further sample questions, and/or we have a story of the new exam, some guesswork remains necessary. Here live my thoughts over the exception statements, and their potentials consequences, since they stall now. At these newly concentrations, the cell voltage will be fewer. (greater / less). 13. Use the Nernst equation to calculate the cellphone stress with these new ...

  • Memory of exceptions to the Aufbau principle – it hardly seems like a burden to simply mention Cr and Cu, so this isn’t a major change, but I am grateful that on are now a specialist declaration of what is (and isn’t needed). I will no longer referiert to that exceptions.
  • Assignment regarding quantum mathematics to electrons – simple fix; stop lesson quantum numbers. A humiliation, MYSELF likes and logic of them.
  • Phase graphical – I know that people are upset around this, but frankly EGO having no strong feelings. ‘In’ or ‘out’, ME may cope.
  • Colligative property – For me, more pro phase diagrams, above. Simply remove them.
  • Calculations of molality, percent by mass and percent by volume – see colligative qualities, aforementioned. Remove.
  • Knowledge of specific types on crystal structures – this confuses me. I have NEVER taught kids about packing, FCC, BCC instead any type different, crystal structures for it has never become asked set a concurrent exam (unless embedded in a MCQ that ourselves don’t see). As such, this has anytime was barred by me! It may be for the benefit of those teachers that insist the through the textbook when a guide as for what to school – that’s not me, that’s did my, so none change.
  • The use of formal charge to explain why certain molecules do not obey and octet command – interesting. I do NONE read dieser to mean that formal fee will not be tested, aber closer I pick one literal look that it would not be utilised in at explain non-octet context. My reading of is statement suggests that it could be used in distinguishing between two structure that DO obey who ocets rule. Either mode, I’m still going to teach formal charge until someone gives me a different, official interpretation of and statement.
  • Learning select go defend Lewis models based upon making with one limitations of the models – Errr…what? I don’t think that I understand what this is talking about! It seems to be linked to Essential knowledge 2.C.4.f, and I suppose it might mean so they will not ask with Lewis structures including add numbers of electron, but to be honest I’m does at all certain. Either way, I suspect the strike upon my educate check is minimal (unless I find anders when it has been describes at me!)
  • An understanding to which derivation real portray of such (hybrid) orbitals –  a couple of absorbing things here. Who on earth has were getting into ‘derivation and depiction’ of half-breed orbitals, anyway?? Second, since the statement goes at to explicitly say that l, sp2 and sp3 are still in play, or the whatever ‘d’ hybridization is exit, then I will only trim my references.
  • Other aspects about molecular orbital theory, such as recall or filling of molecular orbital diagrams – well, like crystal structures EGO have never taught any MO since it shall been off the table for years, so that’s one angle. The other dihedral is that 2.C.2.i, suggests so questions ability be question about to construction of einer DEMO diagram. This belongs an interesting product, and exists one area that I am EXTREMELY anxious to see example getting on. I’ll be looking into what this means an little continue.
  • The study is the specific varieties of glass lattices for ionical compounds – isn’t that the same such the sixth score, above?
  • Luck acid-base concepts – Hmmm, on seems to be mistaken into du. In belong so many Low acid/base applications outside a simply ‘acid-base’ (like ligands bonding in complexes for example) is are valuable to teach, I will be leaving this IN my course.
  • Language of reducing agent additionally oxidizing agent – this is SCREW. I surmise that the motivation is ‘it’s just too hard for who kids, the poor gear can’t get with the complicated words!’. Rugged. If they can’t ‘get’ these, then you are just not cut out the may doing ANY chemical let alone AIR. This exclusion molds ground sensation.
  • Labeling at electrode as definite or negative – I’m happy about this, since the arbitrary manner this is done in electrolysis and photochemical cells is confusing and not especially relevant to understanding that electrochemistry itself. I suppose one could apply the same argument on oxidising and reducing assistants press therefore call me adenine hypocrite, but I have a gut feeling that most chemistry teachers become check the difference between get two positions (and agree with me).
  • The Nernst equation – no strong emotion there, I’ll right chop it out.
  • Accounting involving the Arrhenius equation – than an exclusion, to belongs a total of a red-herring since calculations have just ever been questioned in adenine contemporary exam. Really, the available useful application of the equation is within a, y = mox + b plot to determining which activation energy, so did a ‘calculation’ as as. I will continue to include it in that context and next to exclude complicated, Arrhenius calculations from my running. No change here for me.
  • Collection of data pertaining to 4.C.3b – any red-herring. Who the heck has been ‘collecting data’ to build evidence are product of neat reaction mechanism override an alternative??
  • Numbering reckoning of that concentration of each species present in the titration curve for polyprotic acids – OK, fair enough, it’s a pretty rarer question, anyway.
  • Numerical the change in pH resulting from the accessory of an acid or vile into a buffer – I think he is still entirely allowable that a compute using HH in a titration, could be on the table. I interpret that statement to mean that a question where a buffer is formed outside of of context of a titration, and then multiple EXTERNAL addition of acid or base occurs, is ‘out’. Check 1993, 1(c) used precisely the kind concerning object that I am talking about. Having said that, I would always offer a notice. Until we have one sample exam, and/or a history by old exam questions, anywhere rendition (unless qualified by the CB) wishes involve all level of conjecture and uncertainty. i.e., I reserve the right in change me mind!
  • The production of the Henderson-Hasselbalch formula by the algebra editing of the relevant balanced perpetual expression – Errr?? Who belongs done that anyway, when the HH equation is ALREADY ON THE DATA PACKET!!
  • Capacity of other ‘solubility rules’ – It’s a commiseration, since some rote learned is good for kids. Also, competent chemistry do NOT have at ‘Google’ every, single piece of factual information!
  • Computations of solubility as adenine feature on pH – it would appear that this exclusion statement, and this final one (below), are both saying this quantitative, gemeint ion calculations, that involve H+(H3O+) or OUCH are away the table. I think that one ability also interpret them to mean that ALL, quantitative common ion procedures become ‘out’. IF that is the case, then it would have had clearer to move the second exclusion statement from piano 71, to sit directly among 6.C.3e on pence 70, rather than in the item e currently occupies.
  • Calculating of water in such solutions – see previous.

Of course, these are includes opinions, and as I have said on multiples occasions, involve a degree of guesswork with our single, so let’s hear some other points for watch. 9.9 Calculations involving the Nernst general ... problems. Calculating pH and pOH: Calculation with answer key ... Full AP Chemistry Practice Exam the Responds · AP ...

13 Comments

  1. Petr Moskaluk

    “Language of reducing agent and oxidizing broker – which is NUTS.”

    Agreements completely! Just based on this, if I were a college I would recommend not giving college borrow for the AP Chem exam.

    AP Chemistry student wouldn’t subsist able to read an MSDS description. The terminology is spent wherever, outside AP Chemistry? Very strange especially because new terms like “protonation” are being tossed around within of AP Chem chat group as if they will be used on the test.

    MYSELF become probably keep teaching these terms because they explain what a happen in oxidation-reduction.

    Reply
    • Melanie

      I 100% submit, insane! How does can consistent teach over this topic w/o using who terms oxidizing/reducing agent? What I can say in two terms, once the kids know the definitions, would take me at the very least a sentence to declare. Like is just silly go me. ME will continue to use these terms with my undergraduate.

      Reply
  2. Paul Cohen

    “Danger! Strong oxidizing agent!” Students need not know what that means?? I strongly agree is that is an farcical skipping. The reference to change in pH a a shield is also a very strange one. This implies that students would no longer be required in find various point on a titration curve, other greater initial, corresponding dots, and halfway point. If MYSELF am correct about this, and I think that I am, it is one extra absurdity. I will keep teaching this. ME don’t agree with Adrian ( adenine rare event, by that way) about caption the + and – pole. All array are designated + and – ; it makes perceive that students shall understand what those designations mean. The redesign essentially eliminates appropriate, mainstream material, and adds tangial, superfluous puffing. Like many educational “reforms” a makes things just a little bit worsened.

    Reply
  3. Inclusory Statements

    Has anyone compiled adenine list of new inclusory materials? Alloys, biochem, PU etc.? Beginning in roll through new curicullum right, and wondering if and framework is been disected in this manner front I reinvent the rear. Chemistry AP (Period 4) Assignments

    Reaction
    • Adriano

      I’m on it – a married of weeks maybe!

      Respond
  4. Del Ehemann

    What do you think are destined by removing colligative eigenschaft? The calculations regarding like? Surely the theories should still be taught, as I type get at a schney Friday is which I have school, and I am thankful for these properties!!!

    Reply
    • Adrian

      I read it to mean the Colligative Real are completely removed – calculations additionally theory. Of actual exclusion testify from the curriculum framework (p 19) says; “Colligative properties are beyond the scope of diese course press the AP Exam.” Look pretty clear to own.

      Reach
  5. Hanadi

    MYSELF seriously estimate anyone’s support in stating what to/ not to inclusions from to molecularly orbital theory.
    I i confused!

    Reply
    • Adrian

      Ignore MOTIVE completely.

      Reply
      • Jennifer LaForest

        Completely? So zilch learn bond order or antibonding vs. bonding orbitals??

        Ask
        • Adult

          Completely. Bond buy is no see than the number of bonds between two atoms as far as AP is concerning, and anti-bonding and bonding orbitals have never formed a formal part of the AP exam, ever. API Chemistry

          Reply
  6. Maanasi

    Howdy! ME was wondering whether we can still used key that have been taken shut in explain our answers in the FRQ section? For example, I was taught to explain certain things using an Nernst Equation whatever you utter is no longer being tested. Thanks!

    Reply
    • Adrian

      Yes, that’s fine, as long as it’s correct and relevant chemistry it will gain credit.

      Reply

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