Lab Report 6

.docx

School

University of Houston *

*We aren’t endorsed by this school

Course

2123

Subject

Chemistry

Date

Apr 3, 2024

Type

docx

Pages

3

Uploaded by MinisterIbex160

Report
Thien An Nguyen Tran 2121500 CHEM 2123 3/6/24 TA: Dinelka Priyanganee Amarasekara Kankanamge Class #: 10570 Lab 6: Classification and Identification of Hydrocarbons VII. Calculations: None VIII. Results and Discussion Hydrocarbons are compounds that are mainly made up of hydrogen and carbons. In this experiment, three different types of hydrocarbons were examined: aromatics, alkenes, and alkanes. In general, oils are composed of these hydrocarbons. Physical property testing may provide an explanation for why they are mixed in ether and separated in water. In this experiment, hexane was the specific alkane, cyclohexene was the specific alkene, and toluene was the specific aromatic. In chemical property tests, each of these hydrocarbon types reacts differently with substances such as 1% bromine and 1% potassium permanganate. The experiment's unknowns, unknown A (3), which was toluene-aromatic, and unknown B (1), which was hexane-alkane, were successfully identified. The only known compound that reacted favorably when combined with potassium permanganate and bromine was cyclohexene. Since cyclohexene was the only hydrocarbon compound with an alkene that Br 2 and KMnO 4 could react with, it reacted with both bromine and potassium permanganate. To react with aromatics like toluene, Br 2 and KMnO 4 typically require a catalyst like FeCl 3 or ZnCl 2 . Moreover, they are unable to react with alkanes. IX. Conclusion This experiment demonstrates how different the reactions are between the same compounds and aromatics, alkanes, and alkenes. Because catalysts are required for the reactions of both alkenes and aromatics, alkenes (like cyclohexene) are more reactive than alkanes (like hexane) and aromatics (like toluene). It was observed that Unknown A (3) reacted orange with 1% Br and reddish dark purple with 1% KMnO4, indicating that Unknown A is an aromatic compound. It was observed that Unknown B (1) reacted yellow with 1% Br and blackish purple with 1% KMnO4, indicating that Unknown B is an alkane compound. Mistakes that could have occurred in this experiment include using too few or too many drops of Br or KMnO4 or hydrocarbons needed. 1
Thien An Nguyen Tran 2121500 CHEM 2123 3/6/24 TA: Dinelka Priyanganee Amarasekara Kankanamge Class #: 10570 X. Post-Laboratory Questions 2
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help