Determine the experimental conditions (pH, temperature, sample pre-treatment) that provide the most efficient extraction of REEs from U.S. Appalachian Basin clay.

/in /by

Roanoke ,virgina Stewartsville,clay ,speciation and the characterizing .

Therefore, novel extraction methods are high-priority research subjects. A report from the

USGS (United States Geological Survey) on REEs revealed that the geology and climate of the Central Appalachian Mountains provide a suitable environment for the formation of regolith hosted ion-adsorption clay minerals, which raise the extracted quantity of REEs. Thus, this research aims to develop an efficient strategy to quantify and extract REEs from resources obtained from the Appalachian region in the U.S.5   Specifically, this research has the following objectives.

  1. Employ established sequential leaching methods to speciate REEs present within U.S.

Appalachian Basin clay samples.

  1. Determine the experimental conditions (pH, temperature, sample pre-treatment) that provide the most efficient extraction of REEs from U.S. Appalachian Basin clay.
  • Investigate the benefit of common chelating agents to increase the extraction efficiency of REEs from U.S. Appalachian Basin clay. Possible chelating agents are Ethylene diamine tetra acetic acid (EDTA), nitrilotriacetic acid (NTA), and ethylenediamine succinic acid (EDDS).
  1. Study the inhibition of REE leaching by ever-present phosphate (PO43-) ions in samples of environmental importance.

 

Demonstrate knowledge of the fundamental concepts of atomic structure, chemical bonding, intermolecular forces, chemical periodicity, and properties of the states of matter. Identify different classes of chemical reactions and predict products of basic reactions.

/in /by

COLLEGE CHEMISTRY I

Instructional Methods (Methods of Teaching)
This course will be taught using the distance learning concept. Students will be self-directed and will use the textbook/e-text, lecture videos in Blackboard, Labster virtual labs, and Mastering assignments in learning the material presented in this course. Honorlock will be used for proctoring exams in Blackboard.

TUTORING OPTIONS
STAR INSTITUTE –DECATUR and HUNTSVILLE **FREE TUTORING** On campus and Virtual Sessions
The STAR Institute on the Decatur Campus is located in the Chasteen Student Center Room 230. STAR Huntsville is in the Sparkman Building, Room 206, just beside the Student Center. Many resources are provided including one on one tutoring in most subject areas. Students can also attend group study sessions. Students can submit papers for review and feedback. STAR on campus hours for FA 2021 are Monday through Thursday from 8:00a.m. -5:30p.m. Virtual appointments are available all day and evenings. Hours for virtual appointments are 9:00 a.m.
– 8:00 p.m. Monday through Thursday and 9:00 a.m. – 12:00 p.m. on Friday. Tutors will use the platform that bests fits the needs of the students.
For more information, call (256)306-2594 in Decatur or (256)713-4882 in Huntsville. Tutoring appointments can be made by using the TutorTrac button in your MyCalhoun portal. Visit our web site athttp://calhoun.edu/student-resources/tutoring for information and directions.

Tutor.com is another resource that you can use during the late evening and weekend hours. You can access tutor.com from your Blackboard shell. It is an online tutoring company. Follow the links to access a tutor. You are allowed 2 hours per week during the hours that STAR is closed. (Late nights and weekends)

Course Learning Outcomes
Given assessments, including examinations, homework assignments, laboratory reports and others, the CHM 111 student will demonstrate a minimum of 70% proficiency for the following:
1. Demonstrate knowledge of the fundamental concepts of atomic structure, chemical bonding, intermolecular forces, chemical periodicity, and properties of the states of matter;
2. Identify different classes of chemical reactions and predict products of basic reactions;
3. Write the correct chemical formula from a name and vice versa;
4. Describe the basic principles of thermochemistry;
5. Predict, describe, and explain the behavior of gases using kinetic molecular theory;
6. Solve problems related to measurement, stoichiometry, thermochemistry, gases, and solutions, using dimensional analysis and appropriate equations;
7. Demonstrate proper lab techniques and safety in the performance of common experiments in chemistry; and
8. Apply scientific reasoning to interpret experimental data.

Cite evidence to support your stance concerning either it is more beneficial or too risky to use radioisotopes. Include a Bibliography for your research paper.

/in /by

Nuclear chemistry research paper

Radioisotopes can be used for medical applications, industrial applications, dating and energy production. Opponents of the uses of radioisotopes argue that there are too many risks of radioactivity. Cite evidence to support your stance concerning either it is more beneficial or too risky to use radioisotopes. You must include a Bibliography for your research paper.

Ex. Author Last Name, First Name. ”Webpage Title.”; Website Title, Sponsoring Institution/Publisher, Publication Date, DOl or URL.

Pick a combination of one of the following molecules, one mass quantity, and one total solution volume from this table. Use the same combination as another student so be sure to read any existing peers postings before posting your own.

/in /by

Chemistry 3

For your initial post pick a combination of one of the following molecules, one mass quantity, and one total solution volume from this table. You may not use the same combination as another student so be sure to read any existing peers postings before posting your own.

-Molecule : CaO
-Mass: 7 g
-Volume : 14L

Then, give each of the following for your unique combination being sure to show all of your work:

-%mass/volume concentration
-Molarity
-Osmolarity

Which group represents the control group? What is the independent variable? What is the dependent variable? What should Dr. Farquart’s conclusion be? Why do you think 8 people in group B reported feeling better?

/in /by

THE SCIENTIFIC METHOD

Experiment 1: Serious Sandwiches
Dr. Farquart wants to make her home-town a nicer place to live. She has created a new sauce that she predicts will reduce the production of body gas associated with eating sandwiches from the local cafe. She recruits 100 customers with a history of gas problems. She has 50 of them (group A) eat sandwiches with the new sauce. The other 50 (group B) eat sandwiches with sauce that looks just like the new sauce but is really only a mixture of mayonnaise and food coloring. Both groups were told that they were eating the sauce that would reduce gas production. Two hours after eating the sandwiches, 30 customers in group A reported having fewer gas problems and 8 customers in group B reported having fewer gas problems.

1. Which group represents the control group?

2. What is the independent variable?

3. What is the dependent variable?

4. What should Dr. Farquart’s conclusion be?

5. Why do you think 8 people in group B reported feeling better?

Experiment 2: Slimotosis
Rafael notices that his 3 pet turtles are suffering from “Slimotosis” which occurs when the shell develops a nasty slime and gives off a horrible odor. His friend, Ariel, tells him that rubbing seaweed on the shell is the perfect cure, while Aaron says that drinking kelp water will be a better cure. Rafael decides to test these cures by rubbing one turtle with seaweed for 1 week and having a second turtle drink kelp water. The third turtle is Explore not treated with either cure. After a week of treatment, the slime is gone from the turtle’s shell that drank the kelp water.
1. What was the initial observation?

2. What is the independent variable?

3. What is the dependent variable?

4. What should Rafael’s conclusion be?

Experiment 3: Muscle Cream
Leah was told that a certain muscle cream was the newest and best thing on the market. It claims to double a person’s muscle mass when used as part of a workout. Interested in this product, she buys the special muscle cream and recruits her friends, Samuel and Gideon, to help her out with an experiment. Leah develops a weight- lifting program for Samuel and Gideon. She meets with them once every day for a period of two weeks and records their results. Before each session Samuel applies the muscle cream to his arms and back, while Gideon applies regular lotion to his arms and back.
Weight Lifted Samuel Gideon
Initial 18 Kilograms 5 Kilograms
After 1 Week 24 Kilograms 9 Kilograms
After 2 Weeks 33 Kilograms 17 Kilograms

1. Which person is in the control group?

2. What is the independent variable?

3. What is the dependent variable?

4. What should Leah’s conclusion be?

Experiment 4: Microwave Miracle
Lee thinks that fish that eat food exposed to microwaves will become smarter and would be able to swim through a maze faster. He decides to perform an experiment by placing fish food in a microwave for 20 seconds. He has the fish swim through a maze and records the time it takes for each one to make it to the end. He feeds the special food to 10 fish and gives regular food to 10 others. After 1 week, he has the fish swim through the maze again and records the times for each.

1. What was Lee’s hypothesis?

2. Which fish are in the control group?

3. What is the independent variable?

4. What is the dependent variable?

5. Look at the results in the charts. What should Lee’s conclusion be?

Reading
Read the following section. Once you have completed the reading answer the questions below.
Holt McDougal Chemistry Chapter 2 Section 1 pages 27-29

1. What is the difference between accidental discoveries and scientific investigations?

2. What is the difference between qualitative and quantitative data?

3. Why is a scientific experiment limited to a single system?

4. Explain the difference between an educated guess and a scientific hypothesis.

5. What are controls and variables in a scientific experiment?

6. In science, what does the term theory mean?

7. How are models related to theories and hypotheses?

Explain

Upon watching these videos, write separate reports on: The Halogens The Alkali Metals and The Alkaline Earth Metals.

/in /by

CHEM 51 LAB ACTIVITY FOR WEEK 6

PROPERTIES OF SOME REPRESENTATIVE ELEMENTS

 

Properties of the Halogens (23 min)

https://www.youtube.com/watch?v=QHbaZFSU4_Q

Properties of Alkali Metals (6 min)

https://www.youtube.com/watch?v=QQF61CFOySw

Properties of Alkaline Earth Metals (6 min)

https://www.youtube.com/watch?v=8qh5myTmcRs

 

Upon watching these videos, write separate reports on:

  1. The Halogens
  2. The Alkali Metals
  3. The Alkaline Earth Metals

 

Watch these short videos listed below and write an account of your observations, in three or more paragraphs.

/in /by

C51 EXPT PRECIPITATINON REACTION (1)

LAB ACTIVITY: DEMONSTRATION OF PRECIPITATION REACTION

Watch these short videos listed below and write an account of your observations, in three or more paragraphs:

Demo: Precipitation reaction You tube (4 minutes ): https://www.youtube.com/watch?v=73dw6w0zNXA

Precipitation reaction Demo  ( 3:35 minutes) https://www.youtube.com/watch?v=6TRuMSjxgYs

Demonstrate an ability to accurately identify common glassware used for measuring volume. Choose glassware of appropriate size and precision for a variety of uses and measurements in a chemistry laboratory.

/in /by

ACTIVITY OF WET LABS MEASURING THE MASS & VOLUME OF OBJECTS AND SUBSTANCES

Measuring the Volume of Substances and Objects Using Appropriate Glassware

Objective

Upon completion of this laboratory exercise, students will be expected to:

  • Demonstrate an ability to accurately identify common glassware used for measuring volume.
  • Choose glassware of appropriate size and precision for a variety of uses and measurements in a chemistry laboratory.
  • Accurately record volume measurements of liquids, regular solids (cubes, rectangular prisms, cylinders, etc.), and solid with irregular shapes using appropriate precision for the chosen glassware.

Watch these short videos listed below and write an account of your observations, in three or more paragraphs.

/in /by

CHEM 51 LAB ACTIVITY: DEMONSTRATION OF PRECIPITATION REACTION

 Watch these short videos listed below and write an account of your observations, in three or more paragraphs:

Demo: Precipitation reaction You tube (4 minutes ): https://www.youtube.com/watch?v=73dw6w0zNXA

Precipitation reaction Demo  ( 3:35 minutes) https://www.youtube.com/watch?v=6TRuMSjxgYs

 

 

 

 

What happens during reflux, what happens during distillation? Explain why each step was taken, what should hopped at each stage. What steps did you do in your method and testing that were skillful? Expected results of boiling points from distillation and SjAcic>pp,f1method. How does each test of boiling point work? What are the literature values? How accurate can you be? Are boiling point and IR the best way to measure purity?

/in /by

Ethyl ethanoate

EVERYTHING YOU RESEARCH NEEDS TO BE REFERENCED.

• An introduction to the assignment, what you will be looking at in your report (use assignment brief context).

• What is ethyl ethanoate, what is it used for?

• Risk assessment for all methods and chemicals used.

• Method used step by step making sure to use the words, reflux, distill, purify, use diagrams/pictures of your set up in reflux and distillation, how did you set it up to not cause strain on the components?

• What happens during reflux, what happens during distillation?

• Explain why each step was taken, what should hopped at each stage.

• What steps did you do in your method and testing that were skillful?

• Expected results of boiling points from distillation and SjAcic>pp,f1method.

• How does each test of boiling point work? What are the literature values? How accurate can you be?

• Are boiling point and IR the best way to measure purity?

• IR spectroscopy, how does it work, what peaks are you looking for in your results? Comment on your purity.

• Are your purity tests reliable? • What is yield and how did you try and produce the highest yield? How did you try and get a pure substance?

• How is ethyl ethanoate (ethyl acetate) produced in industry? Describe Scale. Equipment, raw materials, testing for purity.

• How is your method similar and different to the industrial method? How is the equipment similar and different?

• How will the yield be increased in industry? How is this similar to your method?

• How do they test for purity in industry? Are they more reliable than melting point and IR?