Introduction
Hydrocarbons, or molecules which contain hydrogen atoms and carbon atoms that are bonded to each other and may or may not contain other atoms, are classified into two distinct categories: saturated and unsaturated.
unsaturated hydrocarbons have double or even triple bonds between the carbon atoms. This makes unsaturated hydrocarbons even more reactive than saturated hydrocarbons, as well as have fewer hydrogen atoms bonded to the carbon atoms than saturated hydrocarbons have.
The video will help you understand the following topics:
- What are Unsaturated hydrocarbons?
- Alkenes and Alkynes
- Naming and Bond position
Task
1. What are Hydrocarbons made of?
2. What is the smallest unsaturated hydrocarbon chain that exists? (Write the formula and the name of it)
3. From what bonds are unsaturated hydrocarbons made of?
4. How many hydrogen atoms can a carbon atom have?
5. What bonds are in alkenes?
6. What is the general formula for alkenes?
7. What bonds are in alkynes?
8. What is the general formula for alkynes?
9. What is the name of the following chain?
10. If an alkyne has 5 carbons atoms how many hydrogen atoms does it have?
11. Draw a structure named 2- butene.
12. What is the difference between unsaturated and saturated hydrocarbons?
Process
The following exercises contains 12 questions. All of the questions are taken from the video you watched.
The answers to the questions you can write in your notes or talk trough them with your classmate. Answers should contain maximum of 1 sentence.
Evaluation
The correct answers to the exercise.
1. Hydrogen and Carbon
2. C2H4 Ethene
3. Double and triple bonds
4. Carbon atom can contain 4 hydrogen atoms
5. Alkenes have atleast one double bonds
6. CnH2n
7. Alkynes have atleast one triple bond
8. CnH2n-2
9. 1- Butene
10. C5H8
11.
12. Unsaturated hydrocarbons will always have atleast one double bond ( alkenes ) or atleast one triple bond (alyknes)
If you had at least 7 correct answers you have mastered the topic, but you should keep practicing.
Conclusion
On this principle a lot of inorganic chemistry is built so it's very important that you understand this topic and can move on to other and more complex topics.
Credits
Teacher Page
Jānis Matīss Rubulis 11.a