Physical Science: November 2008 Archives

Homework was reviewed and corrected. Students were asked to correctly formulate the answers for #7-15 of the Word Equations WS given on Friday. Those answers are in the file below:

Word Equations.docx

After serious complications by a few students, I would strongly recommend that students review:
Naming Rules
Formula Rules
Oxidation Numbers
Polyatomic Ions

Homework was checked and answered. Students were verbally quizzed on whether or not they could name various compounds from the worksheets.
Using symbols to indicate the phases of substances in reactions were covered:
Solids (cr)
Liquids (l)
Gases (g)
Aqueous Solutions (aq)

As was the concept that the total mass of the reactants and the total mass of the products must be equal to each other.

Homework:
p. 637, # 1, 2 ,4, 6
p. 640, # 1, 2, 3, 4, 5, 6
p. 644, # 1, 2, 3, 6, 7

and this worksheet, asking students to correctly write the formulas from names...

PSif62.bmp

I've tried several times to upload the PPT version of the notes, but there seems to be some kind of internet problem. I'll try again tomorrow.

We continued balancing equations, and began classifying equations:
Synthesis
Decomposition
Single-Replacement (Single-Displacement) also called substitution reactions
Double-Replacement (Double-Displacement) also called metathesis reactions
Combustion
 We also listed properties for identifying Acids and Bases in Neutralization reactions...

Now these three worksheets are completable and due tomorrow, Friday, 11/21:
PSif61.bmp

Students took their test on Bonding.

We began the process of balancing equations by counting the numbers of atoms in a formula. We noted the exceptions for counting atoms in a formula that contains subscripts, parentheses, and coefficients.
Balancing a chemical equation has to to with using coefficients to multiply the number of atoms of a particular element on both sides (reactant and product) of a chemical equation.

The homework was answered, and students were introduced to elementary chemical equations, including the three parts of a chemical equation:

reactants

products

yeild arrow

 

They were assigned a larger homework review due Thursday, 13 November:

pp. 626-629

1-10

11-18

20, 23, 24, 27, 29, 31, 32

An outline was created to review for the topics on the next major test on Friday, the 14th of November.

Students were asked to complete the following questions from their textbooks for homework:

p. 606, # 2, 5, 6

p. 614, # 2, 4, 6

p. 621, # 1, 2, 3, 4

Students were asked to complete a vocabulary worksheet to help them focus after the Election Day Vacation.

PSKey Terms Chemical Bonds.bmp

They were introduced to hydrates, their naming and how to spot their formula.
They were given a small packet of review materials to begin their progress towards the next test.

Students continued to exercise their process skills by naming compounds in covalent bonds (using prefixes), compounds made from polyatomic ions (NOT changing the polyatomic ion's name), and using roman numerals to denote the oxidation number of metals in groups 3-12 and under the stair-step on the periodic table.

As a culminating activity, students were asked to name compounds of all kinds on one worksheet and to successfully write a chemical formula from just the name of the compound on another.

PSif56.bmp
PSif58.bmp
PSif59.bmp
PSif60.bmp