Chemistry (Period 5,7) Assignments
- Instructors
- Term
- Fall 2014
- Department
- Science
- Description
-
Files
Upcoming Assignments
No upcoming assignments.
Past Assignments
Due:
Assignment
Your lab experiment should be complete by now and the discussion is due today.
Here are the guidelines. Write a meaningful paragraph that addresses the following:
- Why the copper penny turns green
- Why the metal wire around the penny corroded (oxidized) faster than the metal wire that was by itself.
- In terms of the oxidation-reduction chemistry: why you added salt to the water.
- How the environment you set up (acid) accelerated up the process.
- Write a balanced net ionic equation to show the oxidation of Iron metal by copper ions in solution.
- Write a balanced equation to show iron oxidizing (by oxygen in the air) to rust.
Re-reading the Statue of Liberty article will help with your discussion.
Due:
Assignment
Attached are the files for Table of Reduction Potentials and Electronegativities
Due:
Assignment
Read the attached file for our final lab of this semester. Start the lab as soon as possible. It may take a day or two to complete the corrosion (oxidation) process. We will talk about the discussion write up today in class.
Due:
Assignment
Write correctly balanced chemical equations for the following reactions that you carried out in lab on Thursday:
- aluminum metal solid + copper (II) sulfate solution forms solid copper metal + aluminum sulfate solution.
- zinc metal solid + lead (II) nitrate solution forms solid lead metal + zinc (II) nitrate solution.
- zinc metal solid + copper (II) sulfate solution forms solid copper metal + zinc (II) sulfate solution.
- iron metal solid + lead (II) nitrate solution forms solid lead metal forms solid lead metal + iron (III) nitrate solution.
Read the attached file for our final lab of this semester. Start the lab as soon as possible. We will talk about the discussion write up on Monday
Due:
Assignment
Section 8.2 (8-9) and Chapter 18 (18-20)
Due:
Assignment
The following homework is due on Tuesday (12/2) when we return from the week long break. You will be forming crystal precipitates which take time (several days), so you should start as soon as possible. The following you tube link will guide you through the process. They use table salt (sodium chloride, NaCl) in the video. Try one experiment with table salt and a second one with baking soda (sodium bicarbonate, NaHCO3). Bring your results (from both experiments) in for one extra credit point.
The process is not a chemical reaction forming a precipitate as we did in lab, but rather a dehydration to the point that the solid crystallizes out (physical change). It is the analogous to the process that occurs in caves when stalactites form. Write a one-paragraph discussion that explains your observations of the solid formation. Consider the process to be the reverse of the dissolving process, and explain it in terms of enthalpy of hydration, lattice energy, breaking and forming bonds, changes in entropy, predicted changes in temperature of the solution, predicted changes in the electrical conductivity of the solution. Sketch a particle-level model of the process and write a balanced equation for the process. just remember that it is a physical change taking place not a chemical one.
Due:
Assignment
The following homework is due on Tuesday (12/2) when we return from the week long break. You will be forming crystal precipitates which take time (several days), so you should start as soon as possible. The following you tube link will guide you through the process. They use table salt (sodium chloride, NaCl) in the video. Try one experiment with table salt and a second one with baking soda (sodium bicarbonate, NaHCO3). Bring your results (from both experiments) in for one extra credit point.
The process is not a chemical reaction forming a precipitate as we did in lab, but rather a dehydration to the point that the solid crystallizes out (physical change). It is the analogous to the process that occurs in caves when stalactites form. Write a one-paragraph discussion that explains your observations of the solid formation. Consider the process to be the reverse of the dissolving process, and explain it in terms of enthalpy of hydration, lattice energy, breaking and forming bonds, changes in entropy, predicted changes in temperature of the solution, predicted changes in the electrical conductivity of the solution. Sketch a particle-level model of the process and write a balanced equation for the process. just remember that it is a physical change taking place not a chemical one.
Due:
Assignment
The following homework is due on Tuesday (12/2) when we return from the week long break. You will be forming crystal precipitates which take time (several days), so you should start as soon as possible. The following you tube link will guide you through the process. They use table salt (sodium chloride, NaCl) in the video. Try one experiment with table salt and a second one with baking soda (sodium bicarbonate, NaHCO3). Bring your results (from both experiments) in for one extra credit point.
The process is not a chemical reaction forming a precipitate as we did in lab, but rather a dehydration to the point that the solid crystallizes out (physical change). It is the analogous to the process that occurs in caves when stalactites form. Write a one-paragraph discussion that explains your observations of the solid formation. Consider the process to be the reverse of the dissolving process, and explain it in terms of enthalpy of hydration, lattice energy, breaking and forming bonds, changes in entropy, predicted changes in temperature of the solution, predicted changes in the electrical conductivity of the solution. Sketch a particle-level model of the process and write a balanced equation for the process. just remember that it is a physical change taking place not a chemical one.
Due:
Assignment
Assessment Chemical Reactions in aqueous solution (precipitation reactions), Lattice energy, Enthalpy of Hydration, Solubility of solids in solution, melting points; balancing equations, identifying reaction types
Homework due today: pick three reactions that formed precipitates in experiment #6 part 2, and do as we did in class today: use the solubility table from your text to identify the precipitate, write the correct formulas for the reactants and products and write a balanced equation, ionize the aqueous species and eliminate the spectator ions, write the balanced net ionic equation for the precipitation, and for one of them sketch a particle level representation.
Due:
Assignment
The following homework is due on Tuesday (12/2) when we return from the week long break. You will be forming crystal precipitates which take time (several days), so you should start as soon as possible. The following you tube link will guide you through the process. They use table salt (sodium chloride, NaCl) in the video. Try one experiment with table salt and a second one with baking soda (sodium bicarbonate, NaHCO3). Bring your results (from both experiments) in for one extra credit point.
The process is not a chemical reaction forming a precipitate as we did in lab, but rather a dehydration to the point that the solid crystallizes out (physical change). It is the analogous to the process that occurs in caves when stalactites form. Write a one-paragraph discussion that explains your observations of the solid formation. Consider the process to be the reverse of the dissolving process, and explain it in terms of enthalpy of hydration, lattice energy, breaking and forming bonds, changes in entropy, predicted changes in temperature of the solution, predicted changes in the electrical conductivity of the solution. Sketch a particle-level model of the process and write a balanced equation for the process. just remember that it is a physical change taking place not a chemical one.
Due:
Assignment
Section 8.1 (9-13) due; however, I just posted this on Tuesday night, so you may turn it in on Friday for full credit.
Due:
Assignment
Due:
Assignment
Due:
Assignment
Section 7.3 (9-11)
note that this is a change from the other day, as I had already assigned those other questions previously.
Due:
Assignment
Section 14.1 (1-9) Intermolecular Forces of Attraction
Due:
Assignment
Models of Covalent Molecules (Name, Chemical Formula, needed, available, shared, Lewis electron dot formula, hybridization, structural formula, shape, polarity, electronegativity arrows, and delta + or delta - if appropriate)
- sulfur dihydride
- phosphorus tribromide
- carbon tetrachloride
The "Predicting Molecular Geometry" resource page is attached
Assessment Molecular Models of Covalent Compounds today. The assessment will be OPEN NOTE.
Due:
Assignment
Due:
Assignment
Discussion Investigation #4 due
It is different from an essay. In case you cannot open the attached file, the guidelines are included below.
Investigation #4 – Atomic Structure (Discussion)
The Discussion for this investigation is written differently from your previous lab discussions. Instead of an essay format, this discussion will actually be a timeline of scientists and their contributions to the development of atomic theory from the 1700s through the early 1900s. This discussion is worth 15 points (10 points for scientific accuracy and 5 points for presentation)
Here are the guidelines:
• The timeline can be up to two 8 ½ by 11 sheets attached either vertically or horizontally.
• Each entry must include the scientist’s name and his/her specific contribution to the development of atomic theory (including a very brief description of their experiment when applicable).
• Each entry should be located on your timeline at the approximate time of discovery; however, sometimes that precise information is not available. In such cases, assume that the discovery was made when the scientist was about 35 years old (you will need to look up birthdates).
• Pictures are important to your 5 point presentation grade. Try to vary the pictures: people, atomic particles, equipment, etc. You do not need to have a picture for every entry (ten pictures minimum).
• Below are the twenty contributors that should appear on your timeline. They are listed in alphabetical order, not the order in which they contributed to atomic theory. You will need to do some research. The following page (only on the attachment) has some sample timelines for your reference. They are just samples; there are many ways to make a good timeline
Avagadro Amadeo
Becquerel and Curie Henri, Marie, and Pierre
Bohr Neils
Chadwick James
Compton Arthur
Dalton John
de Broglie Louis
Einstien Albert
Heisenberg Werner
Hund Friedrich
Lavoisier Antoine
Maxwell and Hertz James and Heinrich
Mendeleev Dimitri
Millikan Robert
Pauli Wolfgang
Planck Max
Proust Joseph
Rutherford Earnest
Schrodinger Erwin
Thomson JJ
The Discussion for this investigation is written differently from your previous lab discussions. Instead of an essay format, this discussion will actually be a timeline of scientists and their contributions to the development of atomic theory from the 1700s through the early 1900s. This discussion is worth 15 points (10 points for scientific accuracy and 5 points for presentation)
Here are the guidelines:
• The timeline can be up to two 8 ½ by 11 sheets attached either vertically or horizontally.
• Each entry must include the scientist’s name and his/her specific contribution to the development of atomic theory (including a very brief description of their experiment when applicable).
• Each entry should be located on your timeline at the approximate time of discovery; however, sometimes that precise information is not available. In such cases, assume that the discovery was made when the scientist was about 35 years old (you will need to look up birthdates).
• Pictures are important to your 5 point presentation grade. Try to vary the pictures: people, atomic particles, equipment, etc. You do not need to have a picture for every entry (ten pictures minimum).
• Below are the twenty contributors that should appear on your timeline. They are listed in alphabetical order, not the order in which they contributed to atomic theory. You will need to do some research. The following page (only on the attachment) has some sample timelines for your reference. They are just samples; there are many ways to make a good timeline
Avagadro Amadeo
Becquerel and Curie Henri, Marie, and Pierre
Bohr Neils
Chadwick James
Compton Arthur
Dalton John
de Broglie Louis
Einstien Albert
Heisenberg Werner
Hund Friedrich
Lavoisier Antoine
Maxwell and Hertz James and Heinrich
Mendeleev Dimitri
Millikan Robert
Pauli Wolfgang
Planck Max
Proust Joseph
Rutherford Earnest
Schrodinger Erwin
Thomson JJ
Due:
Assignment
Formulas and Names for Ionic and Covalent Compounds (the two sided worksheet) that you copied onto your own paper is due today.
Assessment (Ionic vs Covalent bonding) today
Due:
Assignment
Section 4.2 (14-18) and Outline Section 12.4
Due:
Assignment
Section 4.1b (9-13) and Section 12.3 (25-26)
Due:
Assignment
Section 12.3 (18-24)
Due:
Assignment
Due:
Assignment
Assessment (Bohr's Model of the atom/spectroscopy; quantum mechanical model of the atom/electron configurations,orbital diagrams,electron dot formulas, periodic properties)
Modern Atomic Structure notes due (see attachment)
Review Questions for Assessment Modern Atomic Structure were not ready.
Due:
Assignment
Section 11.4 (20-26) due
Due:
Assignment
Section 11.4 (15-19) due
Due:
Assignment
Discussion Investigation #3 due
It is different from an essay. In case you cannot open the attached file, the guidelines are included below. Also, go to the two website links listed at the bottom of this page and read them before class on Wednesday.
Investigation - Quantifying the Spontaneous Decay of an Unstable Isotope (Discussion)
The Discussion for this investigation is written differently from your previous lab discussion. Instead of an essay format, write this discussion as an advertisement for the discovery of some ancient Egyptian (or Myan or Incan or …) artifact you have.
Be as creative as you like, but the discussion must have the minimum following requirements:
• One page typed with a border
• A small picture of your artifact (you can find pictures of ancient artifacts that appeal to you through Google images). Research the age of your artifact and report it. It shouldn’t be more than 50,000 years old.
• An explanation (including one or more diagrams) of how radioactive carbon dating would be used to determine the age of your artifact. Make sure you address these concepts:
o What radioactive isotopes are and the main types of nuclear decay Example
o How Carbon-14 forms in the atmosphere
o How carbon cycles in the environment and gets into plants and animals, and the type of nuclear decay that Carbon-14 goes through
o How half life works
o How the particle accelerator or mass spectrometer is used in the process
Here are two reliable resources you can use:
http://www.pbs.org/wgbh/nova/first/radiocarbon.html
http://science.howstuffworks.com/environmental/earth/geology/carbon-14.htm
The Discussion for this investigation is written differently from your previous lab discussion. Instead of an essay format, write this discussion as an advertisement for the discovery of some ancient Egyptian (or Myan or Incan or …) artifact you have.
Be as creative as you like, but the discussion must have the minimum following requirements:
• One page typed with a border
• A small picture of your artifact (you can find pictures of ancient artifacts that appeal to you through Google images). Research the age of your artifact and report it. It shouldn’t be more than 50,000 years old.
• An explanation (including one or more diagrams) of how radioactive carbon dating would be used to determine the age of your artifact. Make sure you address these concepts:
o What radioactive isotopes are and the main types of nuclear decay Example
o How Carbon-14 forms in the atmosphere
o How carbon cycles in the environment and gets into plants and animals, and the type of nuclear decay that Carbon-14 goes through
o How half life works
o How the particle accelerator or mass spectrometer is used in the process
Here are two reliable resources you can use:
http://www.pbs.org/wgbh/nova/first/radiocarbon.html
http://science.howstuffworks.com/environmental/earth/geology/carbon-14.htm
Due:
Assignment
Section 11.2-11.3 (8-14) due
Investigation #3 is not due today, but read the guidelines for this discussion. It is different from an essay. In case you cannot open the attached file, the guidelines are included below. Also, go to the two website links listed at the bottom of this page and read them before class on Wednesday.
Investigation - Quantifying the Spontaneous Decay of an Unstable Isotope (Discussion)
The Discussion for this investigation is written differently from your previous lab discussion. Instead of an essay format, write this discussion as an advertisement for the discovery of some ancient Egyptian (or Myan or Incan or …) artifact you have.
Be as creative as you like, but the discussion must have the minimum following requirements:
• One page typed with a border
• A small picture of your artifact (you can find pictures of ancient artifacts that appeal to you through Google images). Research the age of your artifact and report it. It shouldn’t be more than 50,000 years old.
• An explanation (including one or more diagrams) of how radioactive carbon dating would be used to determine the age of your artifact. Make sure you address these concepts:
o What radioactive isotopes are and the main types of nuclear decay Example
o How Carbon-14 forms in the atmosphere
o How carbon cycles in the environment and gets into plants and animals, and the type of nuclear decay that Carbon-14 goes through
o How half life works
o How the particle accelerator or mass spectrometer is used in the process
Here are two reliable resources you can use:
http://www.pbs.org/wgbh/nova/first/radiocarbon.html
http://science.howstuffworks.com/environmental/earth/geology/carbon-14.htm
The Discussion for this investigation is written differently from your previous lab discussion. Instead of an essay format, write this discussion as an advertisement for the discovery of some ancient Egyptian (or Myan or Incan or …) artifact you have.
Be as creative as you like, but the discussion must have the minimum following requirements:
• One page typed with a border
• A small picture of your artifact (you can find pictures of ancient artifacts that appeal to you through Google images). Research the age of your artifact and report it. It shouldn’t be more than 50,000 years old.
• An explanation (including one or more diagrams) of how radioactive carbon dating would be used to determine the age of your artifact. Make sure you address these concepts:
o What radioactive isotopes are and the main types of nuclear decay Example
o How Carbon-14 forms in the atmosphere
o How carbon cycles in the environment and gets into plants and animals, and the type of nuclear decay that Carbon-14 goes through
o How half life works
o How the particle accelerator or mass spectrometer is used in the process
Here are two reliable resources you can use:
http://www.pbs.org/wgbh/nova/first/radiocarbon.html
http://science.howstuffworks.com/environmental/earth/geology/carbon-14.htm
Due:
Assignment
Modern Atomic Structure: Section 11.1 (1-7) from the attachment to the right
Due:
Assignment
Read Section 19.1. Answer questions 1-16 from the file to the right: Radioactivity and Nuclear Energy.
Quiz today: structure of the atom, isotopes, nuclear decay
Due:
Assignment
Write up discussion for Investigation #2 Searching for a Regularity due. Use the attached file as a guide.
The Densities and Specific Heat (Heat Capacities) of Metals charts are attached as well.
Due:
Assignment
Some of you may have had trouble opening the attachments for the Investigation #2 Discussion. I've included them again here below.
Investigation #2 – Searching for a Regularity (Discussion)
• Reminder, laboratory discussions carry the heaviest weight in the lab grade, and your discussion must be typed.
• This discussion should be written as 4 paragraph essay. This format provides for a practical application of skills you have learned in your English writing classes.
• Your discussion for this investigation will be largely an expository essay on quantitative intensive physical properties of matter, and organizing data to identify quantitative patters; however, like Investigation #1, it will include some elements characteristic of a persuasive essay (defending your hypothesis as to the identity of the red-brown and silvery metals). The breakdown is as follows:
o Introductory Paragraph: Include a minimum of four sentences, with your thesis sentience being your objective, and the three additional sentences each relating to a paragraph in your essay.
o Body 1: Distinguish between extensive and intensive physical properties, and explain thoroughly how we discovered an intensive property (density) through graphing extensive property data. Discuss the sources of inherent error in the raw data and how they contribute to the uncertainty of the reported density.
o Body 2: This paragraph should have a persuasive element to it. Restate your hypothesis as to the identities of the red-brown and the silvery metals. Describe the two quantitative physical tests and each of the chemical tests we carried out, and the significance of those results in either supporting or contradicting your hypothesis.
o Closing Paragraph: Be sure to restate your thesis and draw from each of your body paragraphs. Also be sure to indicate whether your hypothesis is likely correct or not.
• Reminder, laboratory discussions carry the heaviest weight in the lab grade, and your discussion must be typed.
• This discussion should be written as 4 paragraph essay. This format provides for a practical application of skills you have learned in your English writing classes.
• Your discussion for this investigation will be largely an expository essay on quantitative intensive physical properties of matter, and organizing data to identify quantitative patters; however, like Investigation #1, it will include some elements characteristic of a persuasive essay (defending your hypothesis as to the identity of the red-brown and silvery metals). The breakdown is as follows:
o Introductory Paragraph: Include a minimum of four sentences, with your thesis sentience being your objective, and the three additional sentences each relating to a paragraph in your essay.
o Body 1: Distinguish between extensive and intensive physical properties, and explain thoroughly how we discovered an intensive property (density) through graphing extensive property data. Discuss the sources of inherent error in the raw data and how they contribute to the uncertainty of the reported density.
o Body 2: This paragraph should have a persuasive element to it. Restate your hypothesis as to the identities of the red-brown and the silvery metals. Describe the two quantitative physical tests and each of the chemical tests we carried out, and the significance of those results in either supporting or contradicting your hypothesis.
o Closing Paragraph: Be sure to restate your thesis and draw from each of your body paragraphs. Also be sure to indicate whether your hypothesis is likely correct or not.
Due:
Assignment
Read Section 3.3-3.5. Answer questions 17-30 from the file to the right: Elements, Atoms and Ions
Due:
Assignment
Read Section 3.1-3.3. Answer questions 1-16 from the file to the right: Elements, Atoms and Ions
Due:
Assignment
This homework assignment will help me to get to know you better as a student.
Paragraph: tell me about the school subject you are most interested in/enjoy the most, and why; and how it fits into your college or career goals. You may also include in your paragraph something about yourself that you would like me to know.
Also, bring all of your notes, video, lab, close read from the first unit to class. We will put together your unit 1 packet, and I will collect today.
Due:
Assignment
Read section 5.2 to 5.3 and complete questions 11-22 from the chapter 5 classwork file to the right
Quiz based on quantitative concepts: measurement, uncertainty, sig figs, graphical relationships, etc.
Due:
Assignment
Write up discussion for Investigation #1 Drawing Meaningful Conclusions. Use the attached file as a guide.
Due:
Assignment
Define the Key Terms (section 5.1)
Due:
Assignment
Review section 5.1. Do questions 1-10 from the Chapter 5 Classwork file at the right.
Due:
Assignment
My homework pages were deleted by mistake.
Previous homework assignments were Chapter 2 questions (1-20). See the file to the right: Nature, Properties, Classification of Matter.
Current Homework: Read and outline section 5.1