Research project and Acids and Bases

Hi…

This week we are presenting our Power Point presentations to the class.  These count as a test grade. 

We are also studying acids and bases at the same time.  The test on acids and bases (chapters 15 & 16 in the textbook) will be Monday or Tuesday…May 19/20th. 

For the test you should know…

 

1. What acids and  bases are including their physical and chemical properties, some examples (names and symbols) and some other basics on the sheet “What are Acids and Bases?”.
2. Arrhenius  and Bronsted Lowry’s definitions for acids and bases (and be able to compare and contrast them.)
3. In the Bronsted Lowry system identify the acid, base, conjugate acid, and conjugate base.
4.  Be able to calculate the pH and pOH of a solution given its concentration (molarity) and possible its percent dissociation.
5.  Know the pH scale and be able to identify locations of strong acids, weak acids, neutral, weak bases, and strong bases.

Vocabulary= acid, base, proton, hydrogen ion, hydronium ion, hydroxide ion, alkaline, neutral, indicator, pH scale, salt, neutralized, buffer, amphoteric

 

Fourth Term

Our first test of Term 4 will be the Thursday after vacation.  This is also a half day for students. 

The topics of the test will be Colligative Properties (Ch. 14) and Green Chemistry.

Students must…

1. Know how to determine if a substance is soluble or not given the solubility rules.
2. Be able to determine i correctly.
3. Know how to look up k_bp or  k_fp in a table and when to use which.
4. Know how to solve word problems using the equation   DT=mki    to determine how much a melting point or freezing point changes.
5. Be able to distinguish physical properties from chemical properties and physical changes from chemical reactions.
6. Understand that colligative properties depend on the number of pieces (i) and NOT the identity of the substance.
7. Know what Green Chemistry is an what some of its basic principles are.

Vocabulary:

aqueous, colligative, dissociate, electrolyte, precipitate, freezing point depression, boiling point elevation, physical property, chemical property, physical change, chemical change, Green Chemistry

Blog update….

Sorry I have not been blogging.  Only one student noticed. 

We had our second test on Gas Laws (Ch. 11)

• Students had to solve problems using the ideal gas law as well as the combined gas law.

And we had a test on Liquids and Solids (Ch. 12). 

• Students had to be able to interpret a phase diagram and understand the implications of that graph (i.e. pressure, not just temperature affects state)
• Students had to interpret and recreate a heating curve and understand the implications of that graph (added energy does not change the temperature of a substance while it is changing state.)
• Students also had to be able to solve problems involving the molar heat of vaporization and the molar heat of fusion and know when to use which.
• Students must also be able to read a table to find the appropriate molar heat of fusion or molar heat of vaporization for a given substance.
• Vocab for ch. 12= freeze, melt, vaporize, condense, sublimation, deposition, phase diagram, triple point, heating curve, molar heat of fusion, molar heat of vaporization.)

We have one more test left this term next MONDAY (for per. 6 ) or TUESDAY (for per 1 & 4).   It is on Solutions (Ch. 13).  This chapter has a lot of vocabulary and a little math.

• Students must be able to distinguish between a solution and a heterogeneous mixture, and identify a heterogeneous mixture as a colloid or a suspension.
• They should understand that solids tend to be more soluble in warm/hot water and that gases tend to be more soluble in cold water. 
• Students should know that solutions are not just liquids.
• Should be able to calculate molarity (M) .
• Should be able to use the formula M1V1=M2V2 to calculate molarity or volume.
• Students should appreciate how ubiquitous solutions are.
• Vocabulary = solvent, solute, homogeneous mixture, heterogeneous mixture, colloid, suspension, solubility, solution, molarity (M), dilute, saturated, unsaturated, alloy, precipitate, aqueous.

Binders will be checked for a test grade on  Monday for Period 4, Tuesday for Period 1, and Wednesday for Period 6.

Second Test of Term 3

Hi…

Our second test of the term will be the week after vacation.  Thursday, February 28 for periods 4 and 6 and on Friday, February 29 for period 1.  Students will have to know

• the GAS LAWS–Charles’, Boyle’s, and Gay Lussac’s (distinguish from each other)
• how to mathematically solve problems using the Combined Gas Law
• how to do any conversions to atmospheres, Kelvin, and liters. 
• know what a direct proportion is and an inverse proportion is
• explain the behavior of gases in the real world in terms of Pressure, Volume and Temperature (as we talked about in class when we did the worksheet with the pizza on top.)

Term 3

Hi All…

Welcome to Term 3!  Our first test of the term will be on Water and polar molecules (end of chapter 6) , Chapter 7 and Chapter 8.  It will be given this Friday, February 8th.

Chapter 7 is about writing and naming formulas and Chapter 8  is about types of reactions and predicting products, so most of this should be review.  You will also study a review sheet for Chapter 7 and one for Chapter 8 that pulls out some other details from the chapters that I want you to know.

Vocabulary (a lot of this is review)=

anion, aqueous, cation, bicarbonate, empirical formula, hydrochloric acid, law of conservation of mass, oxidation number, oxidation state, phosphoric acid, polar, precipitate, product, salt, reactant, reversible reaction, stock system, sulfuric acid….hydrogen bonding, adhesion, cohesion, molar heat of fusion, molar heat of vaporization, universal solvent. 

If you want to tell if a molecule is polar or not draw its structural diagram and label the polarities of all the bonds (pointing toward negative end).  If there is a positive end and a negative end of the molecule then it is polar.  For help/ review try this site:

http://www.cartage.org.lb/en/themes/sciences/chemistry/Inorganicchemistry/Informationbonding/bondingindex/MoleculePolarity/MoleculePolarity.htm or at the bottom of this page:

http://www.sparknotes.com/testprep/books/sat2/chemistry/chapter4section8.rhtml

Midyear Exams

The science midterms will be given on Monday, January 28th at 8AM (date was changed after the snow day).  Students must bring a scientific calculator and a #2 pencil.  They will be given a periodic table with an activity series and the polyatomic ions and charges (without names.)

Students have been given a detailed checklist of what to study for the midyear exam.  We are doing a little reviewing in class but most studying and reviewing should be done at home.

The test is worth 25% of the grade for term 2.

Happy New Year! Happy End of Second Term!

I just saw my posting about the last test never got up and no one noticed!  Maybe next year I will skip this blogging thing.

Midyear Exams:

The midyear exam will count 25% (pg 19) of your second term grade.  It will be given on Friday, January 25th and will be the first exam that day (starts 8AM).    Bring a #2 pencil and your calculator.  In class your teacher will tell you which room it will be held in.

 The Rest of the Term…

We will have one more test this term and one computer project (research paper) that will count as a test.  I will also check binders which counts as one more test.  The term ends Tuesday January 22 except for the midyear part of your grade.

The next test will be on Ionic and Covalent Bonding (Chapter 6).  It will be given the last week of the term. 

• Period 6 will take it Monday, January 14.
• Period 4 and Period 1 will take it Wed., January 16. 
• If you are absent for this test you have to make it up by January 18–before the long weekend!

For the test you will need to be able to do the following:

q       Determine if a compound is ionic, polar covalent or non-polar covalent given a chart of electronegativities.

q       Understand the concept of electronegativity.

q       Understand the difference in “sharing” in ionic, polar covalent or non-polar covalent bonds.

q       Name a covalent compound correctly given its formula.

q       Write the formula of a covalent compound correctly given its name.

q       Name ionic compounds correctly as we learned earlier in the year.

q       Know that “molecular compounds” means the same as “covalent compounds”.

q       Draw Lewis Dot diagrams for molecular (covalent) compounds, including compounds that have double or triple bonds. (ex. CO_2, N₂)

q       Be able to give the shape of a molecule (which is tetrahedral, trigonal pyramidal, trigonal planar, or linear) given only its formula.

q       Be able to determine the shape of a molecule given its formula.

q       Know that the term “VSEPR” refers to a molecule’s geometric shape that results from all the Electrons in the atoms Repelling each other.Know that double and bonds are stronger and hold the atoms closer together than single bonds.

q       Know what the term lone pair refers to.