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.