Reaction of Hexane and Hexene with Br and KMnO4

Alexandra Corrigan

14 Nov 201506:05

Summary

TLDRIn this chemistry-focused video, the host engages in a series of experiments involving hexane and hexene, mixing them with various chemicals like bromine water, potassium manganate, and dilute sulfuric acid. The script captures the process of conducting these reactions, with an emphasis on the visual effects and the excitement of scientific discovery. The video highlights the importance of careful handling and observation, as well as the beauty of chemical reactions, with a humorous and educational approach.

Takeaways

🧪 The video involves an experiment with cyclohexane and hexane, two different types of hydrocarbons.
🔄 The process starts by mixing cyclohexane with bromine water, which is a common test for unsaturation in organic chemistry.
💧 There is a mistake made during the experiment where the bromine water is added before the hexane, which is not the correct procedure.
🔴 The experimenter corrects the mistake and proceeds to mix hexane with potassium manganate, an oxidizing agent.
🌡️ Dilute sulfuric acid is also required in the reaction with potassium manganate, which is added to facilitate the reaction.
📹 The video script mentions issues with the camera focusing, indicating the importance of clear visuals in demonstrating the experiment.
🔄 The script also mentions a second reaction with hexene, another unsaturated hydrocarbon, using bromine water.
🔬 The experimenter uses potassium manganate and sulfuric acid with hexene to test for unsaturation, similar to the cyclohexane reaction.
🤔 There are moments of confusion and uncertainty in the script, suggesting that the experimenters may not be fully prepared or knowledgeable about the procedure.
🎥 The video script includes commentary on the quality of the camera and the focus, highlighting the technical aspects of filming a science experiment.
🌈 The final reaction with hexene and the oxidizing agents results in a 'truly beautiful color,' indicating a successful demonstration of the chemical reaction.

Q & A

What is the chemical being discussed in the script?
-The script discusses cyclohexane (hexane) and its reactions with bromine water and potassium manganate, among other chemicals.
What is the purpose of adding 1 cm cubed of bromine water to the cyclohexane?
-The bromine water is added to cyclohexane to observe a chemical reaction, which is a common test for unsaturation in organic compounds.
Why is the bung (stopper) put on the flask before adding the hexane?
-The bung is used to prevent the evaporation of hexane before the reaction can be observed.
What is the role of potassium manganate in the reaction with hexane?
-Potassium manganate is used as an oxidizing agent in the reaction with hexane, which can help to identify the presence of certain functional groups in the compound.
Why is dilute sulfuric acid added to the mixture of hexane and potassium manganate?
-Dilute sulfuric acid is added to facilitate the oxidation reaction between hexane and potassium manganate.
What is the significance of the color change observed in the reaction with potassium manganate and sulfuric acid?
-The color change is indicative of the progress of the oxidation reaction, with the color being a visual confirmation of the reaction taking place.
What is the term 'hexine' mentioned in the script, and what is its relevance to the experiment?
-The term 'hexine' seems to be a mispronunciation or typo for 'hexene,' which is likely the compound being tested with bromine water for the presence of a double bond.
Why is the camera focusing on the reactions being performed?
-The camera is focusing to capture the visual details of the chemical reactions, which is important for demonstrating the changes occurring in the experiment.
What is the purpose of shaking the flask containing the mixture of hexene, sulfuric acid, and potassium manganate?
-Shaking the flask ensures that the reactants are well mixed, which is necessary for a thorough chemical reaction to occur.
Why is there a mention of needing a 'pet' in the script?
-This is likely a miscommunication or typo in the script. It could be referring to a 'petri dish' or another piece of laboratory equipment needed for the experiment.
What does the script imply about the importance of careful observation in a chemistry experiment?
-The script implies that careful observation, such as watching for color changes and ensuring proper mixing, is crucial for understanding and documenting the outcomes of a chemistry experiment.

Outlines

00:00

🧪 Chemistry Experiment with Hexane and Bromine Water

The first paragraph describes a chemistry experiment involving the mixing of cyclohexane with bromine water. The process begins with the addition of 1 cm³ of bromine water to cyclohexane before it evaporates. There is mention of a music track playing in the background and a need to shake the mixture. The experimenter apologizes for forgetting to put a stopper on the container and then proceeds to demonstrate the mixing process on camera. The paragraph also hints at a subsequent experiment involving hexane with potassium manganate and the need for dilute sulfuric acid, although there is some confusion and dialogue about the procedure.

05:02

🌈 Observations of Chemical Reactions with Hexine and Potassium Manganate

The second paragraph continues the chemistry theme, focusing on the reaction of hexine with sulfuric acid and potassium manganate. The experimenter emphasizes the importance of shaking the mixture thoroughly to ensure proper mixing. The paragraph highlights the striking color change observed in the reaction, which is described as 'truly beautiful.' There is also playful banter and commentary on the camera's focus, adding a light-hearted tone to the scientific demonstration.

Mindmap

Keywords

💡Hexane

Hexane is an organic compound with the chemical formula C6H14 and is a component of many petroleum distillates. It is a nonpolar solvent commonly used in laboratories for the extraction of organic compounds. In the video's context, hexane is mixed with other substances to demonstrate chemical reactions, such as with bromine water and potassium permanganate.

💡Cyclohexane

Cyclohexane is a cyclic hydrocarbon with the same molecular formula as hexane but with a ring structure. It is used as a solvent and in the production of nylon. In the video, cyclohexane is mentioned as one of the substances being mixed, indicating the exploration of its chemical properties in reaction with other chemicals.

💡Bromium Water

Bromium water is likely a mispronunciation or typo for 'bromine water,' which is a solution of bromine in water. Bromine water is used as a reagent in organic chemistry to test for the presence of unsaturation (double or triple bonds) in organic compounds. In the script, it is mixed with hexane to demonstrate a chemical reaction.

💡Potassium Permanganate

Potassium permanganate (KMnO4) is a strong oxidizing agent that is purple in color. It is used in various chemical reactions, including the oxidation of organic compounds. In the video, it is combined with hexane and dilute sulfuric acid to perform an oxidation reaction.

💡Dilute Sulfuric Acid

Dilute sulfuric acid is a common laboratory chemical, which is a less concentrated form of sulfuric acid. It is used in various chemical reactions to catalyze or participate in the process. In the video, it is added to the mixture with hexane and potassium permanganate to facilitate the reaction.

💡Hexene

Hexene refers to a class of organic compounds with the general formula C6H12 and at least one carbon-carbon double bond. It is an unsaturated hydrocarbon and is used in the production of various chemicals and polymers. In the video, hexene is mentioned in the context of a reaction with bromine water.

💡Chemical Reaction

A chemical reaction involves the transformation of one set of chemical substances into another, often accompanied by the release or absorption of energy. The video script describes several chemical reactions, such as the addition of bromine to hexene and the oxidation of hexane with potassium permanganate.

💡Bung

A bung is a plug used to seal the opening of a container, often used in laboratory settings to prevent the evaporation or contamination of substances. In the script, the bung is mentioned to be put on a container before shaking, to ensure the reaction takes place in a closed environment.

💡Shake

Shaking is a common action in laboratory procedures to mix substances thoroughly. In the video, shaking is mentioned as a step to ensure the reactants are well mixed and the chemical reaction can proceed effectively.

💡Color Change

A color change is often an indicator of a chemical reaction, as it can signify the formation of new substances with different properties. In the video, the mention of a 'truly beautiful color' after shaking the mixture of hexene with sulfuric acid and potassium permanganate indicates a successful reaction with a visually noticeable result.

Highlights

Introduction of hexane and cyclohexane in the experiment.

Mixing hexane with bromine water as the first step.

Adding 1 cm cubed of bromine water to the mixture.

The importance of sealing the container before hexane evaporates.

Shaking the mixture to ensure proper mixing.

Introduction of potassium manganate in the next step.

Need for dilute sulfuric acid in the reaction with potassium manganate.

Adding 1 cm cubed of dilute sulfuric acid to the mixture.

Adding three drops of potassium manganate.

Confusion regarding the use of sulfuric acid in the experiment.

Transition to using hexene with bromine water.

Emphasis on the clarity and focus of the camera.

Mixing hexene with bromine water and observing the reaction.

The use of potassium manganate and sulfuric acid with cyclohexane.

Need for a clean petri dish for the next step.

Shaking the mixture for a clear picture of the reaction.

Observation of a beautiful color change in the reaction.

Final reaction involving hexine, sulfuric acid, and potassium manganate.