Monday, June 26, 2017

SUMMER SCHOOL, DAY 11: THE FINAL COUNTDOWN



This is it, students: the final day of the 1st session.  Don't quit, the end is in sight!

On this final day, we will begin immediately with the Lab "Production of SrCO2", which you should've already set up in your Composition Book.   The precipitate produced in this lab will be cured in a drying oven during the morning, and while we are waiting for that to determine our final data points, we will rehearse stoichiometry problems involving MOLARITY.

Any outstanding work from prior to the final day must be handed in by the 10:45 Break on Tuesday, no exceptions.

Your FINAL will be given after the Break.   Like the previous tests, it will contain a multiple-choice section graded on a SCANTRON and a series of Calculations.

The test is comprehensive for the session and includes the following (use the links!) :















SUMMER SCHOOL, DAY 10: NOTES, VIDEOS

Students: HERE are the Power Point Notes on 'Stoichiometry of Fluids' given in the first two weeks of Unit 4, the final unit of the Fall semester in Mr. Hatfield's Chemistry classes.   



This section of notes covers problems having to do with molar volumes of gases, limiting reactants and percent yield, molar concentrations and other properties of solutions.   A Study Guide based on these notes is available HERE in PDF form.

Students, here is the video shown in class, in which Paul Andersen demonstrates limiting reactant and percent yield problems:




The worksheet based on this video is available as a PDF file HERE.


Students can watch Paul Andersen's discussion of solutions and their properties as many times as needed here, on-line, in the video embedded below:




Students can also access the PDF version of the worksheet given in class, based on this video, HERE.

SUMMER SCHOOL, DAY 10: MAPPING STOICHIOMETRY

Students, these are the Power Point Notes given in class which introduce the technique of 'mapping the equation':



This technique is complimentary to the fractional setups which we have been practicing for weeks, setups that allow chemists to convert units via cancellation:



Mapping the equation is very helpful in solving more complex, real-world problems in which the order of operations is important:

In these sort of problems, you should map the equation FIRST, then use the map as clues on how to set up the order of your fractional terms.  

Considering the mapped equation above, let's imagine that we are given 72 grams of hydrogen gas (H2), and we want to know how many grams of ammonia (NH3) can be produced in this reaction . . . .




The map tells us that after we write down the given amount as the first term, the second term should use the molar mass of hydrogen gas (2.02 g/mol), expressing it as a fractional term.   The third term, the mole ratio, we get from the balanced equation:  it tells us that for 3 moles of  on the reactant side, we should have 2 moles of  on the product side.   Finally, to convert from moles to grams, we use another molar mass, the molar mass of ammonia (17.04 g/mol ).

Wednesday, June 21, 2017

SUMMER SCHOOL DAY 9: STOICHIOMETRY

Students:  HERE is the second group of Power Point Notes for your Unit 3 test on Monday:




The first set of notes can be found here:

A Study Guide based on both sets of notes will be made available in Thursday's class, to assist students in preparing for Monday's test.  You can download it as a PDF file here.


Students, as with 'The Mole', I am making this Paul Andersen video available through the class blog.   Please watch as many times as you need:


The worksheet based on this video is available online HERE:

SUMMER SCHOOL,DAY 8: CHEMICAL QUANTITIES (THE MOLE)

Students, you can find the latest Power Point Notes on Chemical Quantities and Moles HERE:






Students:  here is Paul Anderson's video, as shown in class, explaining the concept of the mole with helpful illustrations:




Student should use this video to complete a worksheet given in class, which is also available online HERE.

SUMMER SCHOOL, DAY 7: 'FIREWORKS' VIDEO

Students who were in Mr. Hatfield's classes on Wednesday, June 21st , watched part of a PBS video entitled 'Fireworks!'  Students who need to watch it again, or who were not present on Thursday, will find the video embedded below in this post.

The worksheet for this video can be obtained HERE.

Students should pay careful attention to items from Chapter 5 (electron configuration) and Chapter 7 (ionic compounds):


FLAME TEST LAB

If students were absent on the day we were guests in Mr. Hanna's classroom, they did not get to see the actual lab where we performed a 'flame test' on various ionic compounds.   

Here is a video that shows much the same sort of observations students made on Wednesday.   Unfortunately, we do not have Bunsen burners in my classroom, and so it is not practical to 'make up' the lab.   Watch the video, students, and compare it with observations that students who attended were able to make in order to understand the material:


Tuesday, June 20, 2017

SUMMER SCHOOL, DAY 6: ELECTRON CONFIGURATION

Students, here is the Power Point for the second group of notes,on electron configuration, orbitals, models of the atom, and rules for electrons:



Students should use this along with the previous section of Notes to complete their Study Guide for tomorrow's test, and along the way make sure that everything in the Study Guide does, in fact, appear in the notes in their Composition Book.

SUMMER SCHOOL DAY 6: "LEWIS DOT DIAGRAMS"

Here's a video shown in class on Tuesday, June 20th, in which Paul Andersen explains how to do Lewis dot structures, which are used to keep track of the number of VALENCE ELECTRONS in the representative elements:


Monday, June 19, 2017

SUMMER SCHOOL, DAY 5: PROPERTIES OF MATTER


Students: here are the Power Point Notes that covers material from Chapters 2 and 6.   

Students will be provided a second Power Point tomorrow covering material from Chapter 5, in order to complete their Study Guide ("Properties of Matter") that includes all of the notes for Wednesday's test.


SUMMER SCHOOL DAY 5: "NAMING COMPOUNDS"

Here's another Paul Anderson video that is sure to help students fill in the gaps in their understanding, on how to name both IONIC and COVALENT COMPOUNDS:


Friday, June 16, 2017

SUMMER SCHOOL DAY 4, VIDEO: "THE LIVES OF THE STARS"

;

The following episode of Carl Sagan's Cosmos, 'The Lives of the Stars', forms the basis of a student homework assignment given in class on Friday, July 16th.   


The entire episode is available for students to watch HERE: https://youtu.be/eg1C3zq0ZrQ


SUMMER SCHOOL, DAY 3: "CHEMISTRY, THE BASICS"

Parts of this video were shown in class on July 15th, a day that Mr. Hatfield was out of class and students had a substitute teacher.

The sections of the video shown in class dealt with measurement (metric system, significant figures) and stoichiometry.   I'm making this available here so anyone who was absent that day can review it, or (if present) watch it again.   These topics will crop up on a weekly basis for most of the year.


Wednesday, June 14, 2017

SUMMER SCHOOL DAY 2, VIDEO: COSMIC VOYAGE

Summer School students viewed a 36-minute IMAX video in class on Monday and Tuesday, and should've already completed a worksheet based on part of the video. The film, 'Cosmic Voyage', was made in 1996 for the Smithsonian Institute and was clearly inspired by a classic science education film called 'Powers of Ten', originally produced in 1977 by the husband-and-wife team of Rae and Charles Eames.

'Cosmic Voyage' approaches the idea of using the metric system, which is based on powers of ten, to explore the question: "What is really large, and really small?" The film first zooms out from an acrobat's ring in St. Mark's Square in Venice, the place where Galileo first trained his telescope on the heavens.


Through 23 powers of ten, we leave first the Earth, then our solar system, then the Milky Way Galaxy behind, until we reach the limit of modern astronomy, where we can see images from about 13 billion years past.


Reversing course, the video then zooms in on drop of water in the Dutch town of Delft, where Antonie Van Leuuwenhoek first trained his early microscope to discover the hidden world of microbes.



As we zoom in on a paramecium, we penetrate its cell nucleus, then zoom in on a molecule of DNA.


Within that molecule is a carbon atom, and the world within that atom is mostly empty space! Within the atom, the atomic nucleus contains virtually all of an atom's mass, made of particles called protons and neutrons. These, in turn, are formed from even smaller particles called quarks.

The film continues with a discussion of the search for a fundamental theory in physics through the use of particle accelerators like Fermilab, along with an overview of the likely "recent" events that led to our sun, our solar system, the Earth and life itself.

Here, presented on YouTube, is the first segment (Chapter 1) of the film who wish to review the material or share it with others. As the narrator (Morgan Freeman) intones, 'we are all travelers on a voyage of discovery!' Chapter 2, and Chapter 3 can be assessed at YouTube directly or by clicking on the hyperlinks 

Tuesday, June 13, 2017

SUMMER SCHOOL, 1st SESSION: FIRST DAY

The first set of Notes for Mr. Hatfield's Summer School Chemistry Class are now available on-line, here:




The topics of the notes include the relation of chemistry to mathematics and other sciences, what makes chemistry distinctive in terms of its content and practice, the nature of science, scientific method ("O.H.E.C.K."), atomic theory and the periodic table.

Students should download the Power Point Notes to make sure that their notes are complete, as from time to time their composition books containing their notes will be inspected and graded.

Below is an outline of the 11-day session:



Thursday, June 1, 2017

POWER POINT: NUCLEAR CHEMISTRY

Students:

This is the FINAL set of Notes for the Spring semester!   The end is near, congratulations!

Your FINAL will be based on these notes, Chapter 25, and material from previously-taught chapters related to the atomic nucleus (Chapters 4 and 5):




You can click on the image above or THIS LINK to download the notes.

Tuesday, May 2, 2017

POWER POINT: CARBON, THE SHAPE OF LIFE

Students:

The first week of May ends with a Unit Test on Friday, May 5th!



To help students prepare, please find the Power Point Notes HERE, along with a PDF of the Study Guide based on those notes HERE.


Monday, May 1, 2017

ORGANIC CHEMISTRY VIDEOS

In Monday's class, we talked about the difference between organic (based on carbon) and inorganic (based on some other element) molecules.   Life, of course, is based on organic molecules.

We explained that there are four major classes of carbon-based compounds used by living things:   carbohydrates, lipids, proteins and nucleic acids.

Each of these compounds is made of individual 'building blocks' called MONOMERS.   The monomers are linked together with covalent bonds to make large chains called POLYMERS, and the process of making polymers is referred to as POLYMERIZATION.

Here's a video from Bozeman Science, with animations, that gives some nice background on monomers and polymers:




Carbohydrates are carbon-based macromolecules based on C, H and O.  They are polar and readily dissolve in water.

A simple sugar by itself, like glucose, is termed a monosaccharide, and serves as a 'building block' (monomer) to build a larger chain of many molecules called a polymer. In the case of carbohydrates, the polymer made from many monosaccharides linked together by dehydration reactions is called a polysaccharide.

Examples of polysaccharides made of glucose include cellulose, glycogen and starch.   Each of these glucose polymers are biologically important. 




 Finally, here's yet another video by AP Chemistry teacher Paul Andersen, this on the class of macromolecules called PROTEINS.   



 PROTEINS often are used to build extremely useful and specific molecules called ENZYMES:


 

Wednesday, April 5, 2017

SYLLABUS, UNIT 7

Students, here is syllabus for the current unit, which began BEFORE Spring Break in the third week of March and will end AFTER Spring break, on the fourth week of April.   Notice that we will transition from ACIDS and BASES  (material completed in class before today, April 5th) and will be moving to ORGANIC chemistry, the study of chemical compounds based on the element CARBON.


* * * UPDATE * * *

Due to SBAC testing in block schedules on Tuesday 4/25 and Thursday 4/27, the Unit Test is being moved to Thursday, May 4th.

Tuesday, April 4, 2017

POWER POINT NOTES: ACIDS, BASES, SALTS

Mr.Hatfield's Chemistry students have completed their Notes on material from Chapter 19.   They can download a copy of the Power Point containing those Notes HERE:


Students will soon receive a Study Guide based upon this section of Notes, but beginning tomorrow the class will transition into new material, on ORGANIC chemistry (chapters 22-24 in the text).

Friday, March 31, 2017

VIDEO: ACID-BASE EQUILIBRIUM

Students were shown this video in today's class.   Paul Andersen demonstrates the centrality of water to most acid-base chemistry, and explains how to calculate equilibrium constants for acids (Ka) and bases (Kb), and how to express those as pKa's or pKb's:


Friday, March 17, 2017

VIDEO: WATER, A 'POLAR' MOLECULE

Students were shown the following video by Paul Anderson in class on Friday, March 17th---which is also the last day of the 3rd quarter!  

There is no worksheet associated with this video, but students should be able to explain how water's molecular structure creates polarity, which in turn generates many of water's other properties, including cohesion, adhesion and the tendency to dissociate into ions of opposite charge (H+ and OH-).  

Make sure you are familiar with this material, students!

FINALLY, AS A REMINDER:  Saturday School takes place in Mr. Hatfield's classroom (N-63) on Saturday, March 18th, between 8:45 and 11:30.   

If you were assigned Saturday School and fail to attend without a parent contact, it will be treated as defiance.

Thursday, March 9, 2017

POWER POINT: THERMOCHEMISTRY

Students:

Here are the Power Point Notes for Unit 7:  Thermochemistry.  



In this you will find discussions of phase changes (again!),  heat transfer, the 1st and 2nd Laws of Thermodynamics, and problems to calculate energy (q) , specific heats and enthalpies of reaction:

Click here to download those notes.

Thursday, February 23, 2017

VIDEO: ENTHALPY OF REACTION

The following video by Paul Anderson was introduced in class on Thursday, Feb. 23rd.   It helpfully reviews some of the information already given in lecture regarding heat and the enthalpy of reactions. It also features a very handy, step-by-step demonstration of how to apply Hess's Law (a SUBTLE and advanced topic) to calculate enthalpies.




Students have an assignment based on that video, which is available HERE as a PDF file.

UNIT 6 SYLLABUS, POSTER PROJECT

Students:  We have begun Unit 6, which is concerned with thermochemistry, rates of reaction and factors (such as heat or pH) that affect those rates.   Our syllabus can be found below.   Students received a hard-copy of this in class.   They should use it as a 'checklist' to keep track of major assignments and when they are due:

As for the 'GAS LAW Poster Project':  students can either work on their own, or with a partner.  This is a major 75-point assignment, due on Monday, Feb. 27th.  Students should've already been assigned a gas law and an accompanying situation that applies that law for their poster.  The guidelines for this assignment are found below:




Wednesday, February 8, 2017

VIDEO: GASES

Paul Anderson helps us out again.   This video has a great set of demonstrations using a set of interactive animations.   Students are expected to complete a worksheet based on this video:

Thursday, January 19, 2017

SYLLABUS, UNIT 5

WELCOME BACK!

Students in Mr. Hatfield's Chemistry classes should've spent the first week of the Spring 2017 semester completing a four-part packet of handouts which review math routines taught and rehearsed in the Fall semester.  

On ATLAS, this packet will display as four separate classwork assignments: Molar Mass, Two-Step Problems, Three-Step Problems and Stoichiometry 1.   Each is worth 20 points, but they are shown on the Syllabus below as a single (80-point) assignment:





Students should've also begun answering the Section Assessment Questions from Chapter 13, and beginning on Tuesday of the second week, begun to absorb new material on kinetic molecular theory and gas laws.