CHEMISTRY A (Period 8) Assignments
- Instructor
- Danielle Ramirez
- Term
- Spring 2014
- Department
- Science
- Description
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The major emphasis of this course is to provide problem solving, laboratory investigation and independent measurement techniques. Introduces the mole concept in the study of compounds, gas laws, solutions, and ionization. Introduces atomic structure and orbital electron structure, the periodic law, acids, bases, salts, oxidation-reduction, organic chemistry, and reaction kinetics. Meets physical science for high school and is a conceptual based chemistry class focusing on California State Standards.
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Past Assignments
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- Green Procedure Paper
- Know/Don't Know Notes
- Flow Chart
- Procedure Notes
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- Given acids or bases at the same concentration, demonstrate understanding of acid and base strength by: Describing the similarities and differences between strong acids and weak acids or strong bases and weak bases.
- Demonstrate understanding of solution concentration by: 1. Describing the similarities and differences between concentrated and dilute solutions.
- Use both the strength of the acid or base and the concentration of its solution in order to:1. Describe in words and pictures (graphs or molecular drawings) what it means if you have a: Concentrated solution of a weak acid (or base) or Concentrated solution of a strong acid (or base) or other combinations. 2. Investigate different combinations of strength/concentrations that result in same pH values.
- Describe how common tools (pH meter, conductivity, pH paper) help identify whether a solution is an acid or base and strong or weak and concentrated or dilute.
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Titration Make-up
Directions: Go to the following website http://tinyurl.com/7vosya5, then conduct the following procedure. Write at least one conclusion paragraph
Procedure:
1. Select "Weak Acid vs. Strong Base."
2. Fill Burette with "Base."
3. Click on step 3. From the slide out choose CH3COOH and NaOH
4. Choose Phenolphthalein.
5. Click on the slider next to the Burette to add about 30mL of Base. Notice that the solution in the flask is too pink.
6. Click on "Reset" and then repeat steps 1-4 again.
7. This time add about 18-19mL of the base using the slider.
8. Click on the dropwise button until the first time the solution remains pink.
9. Write down the following data:
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Volume of AcidMolarity of AcidVolume of Base
10. Calculate the Molarity of the Base using the data above.
11. Type answer into Step 6 box and click ok. Record your results.
Conclusion: Claim (what is the objective of a titration), Evidence (State specific information that describes a titration), Reasoning (Why does titration work, explain in chemical terms)
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Kool-Aid Lab Make-up
Directions: Read the Salting Roads article in the ChemMatters magazine February 2006 (Attached File) and answer the following questions on a separate paper. Title the page Kool-Aid Lab Make-up and place in front pocket of portfolio.
- How does molecular motion change during the freezing process?
- Why does the presences of a solute, such as salt, cause freezing to occur at lower temperatures?
- What are the two ways in which salt is used by highway workers?
- Why don’t communities with very cold temperatures use salt on their roads?
- Why are salts such as MgCl2 and CaCl2 more effective than NaCl at depressing the freezing point?
- Give one disadvantage to salting roads.
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Gas Laws Experiment Make-up Assignment
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- Use pictures and proportional reasoning to explain changes in concentration
- Draw what happens at the molecular level when compounds dissolve in water
- Use observations to explain ways concentration of a solute can change.
- Describe ways the formula, macroscopic observations, or microscopic representations of a compound indicates if the bonding is ionic or covalent.