Chemistry Project-Isomers of Heptane

Project 3

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Evaluation 33

Chemistry 2 (SCIH 032 062)

Be sure to include ALL pages of this project (including the directions and the assignment) when you send the project to your teacher for grading. Don’t forget to put your name and I.D. number at the top of this page!

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Project 3a- Isomers of Heptane

Purpose: Is for students to build ball-and-stick models and name the nine constitutional isomers of heptane (C7H16).

Laboratory Materials List

The Projects in this course require special materials. All of the materials for this lab will need to be provided by you, the student. Before doing a project, gather all the items you will need for that specific project and out them on a clear workspace.

Student Will Supply

22 large marshmallows, 52 small marshmallows and 70 toothpicks OR

22 large Styrofoam balls, 52 small Styrofoam balls and 70 toothpicks

paper

pencil

 

Procedure (possible 30 points)

Do the Quick Lab on page 778 in your textbook. Follow the steps under Procedure and answer all the questions in the “Procedure” section.

1. Draw the structural formula for this isomer.

2. Draw the structural formula for this isomer.

3. Is there another position that the methyl group can be placed on this chain of six carbons to form yet another isomer? Explain why or why not.

4. Draw the structural formulas for each isomer.

Analyze and Conclude (possible 20 points)

Using your data from Procedure; record the answers to the following questions 1-4 on page 778 under the “Analyze and Conclude” section. Be sure to answer each question completely and thoroughly.

1. List. What are the names of the nine constitutional isomers of C7H16?

2. Identify. What is the shortest possible straight carbon chain in the group of heptane isomers?

3. Explain. Why does each constitutional isomer have its own unique name?

4. Use models.Look carefully at the structural formulas you drew for the nine constitutional isomers. Identify any that have an asymmetric carbon.

Project 1b- Hydrocarbon Isomers

Purpose: This lab is intended for students to draw line-angle formulas and name some of the isomers in gasoline.

Laboratory Materials List

The Projects in this course require special materials. All of the materials for this lab will need to be provided by you, the student. Before doing a project, gather all the items you will need for that specific project and out them on a clear workspace.

Student Will Supply

marshmallows and toothpicks OR small Styrofoam balls and toothpicks

paper

pencil

Procedure (possible 15 points): Do the Small-Scale Lab on page 787 in your textbook. Follow the steps under Procedure in your textbook to be able to answer the questions under “Analyze and Conclude”.

1. Attach a picture or drawing of your 3 models.

Analyze & Conclude (possible 35 points): Using what you observed from Procedure; record the answers to the following questions 1-3 on page 787 under the “Analyze and Conclude” section.

1.

2.

3.

This project can be submitted electronically. Check the Project page under “My Work” in the UNHS online course management system or your enrollment information with your print materials for more detailed instructions.

Pictures for the textbook/questions.

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Page 778

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Page 787

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