Flammability: Place about 5 drops of the liquid in an evaporating basin. Set the liquid on fire by placing a lighted taper or splint near it. Note the colour and smokiness on the flame in each case.
In addition, note whether any carbon residue is left in the dish. Observation: Cyclohexane produces less colour intensity and less soot given off during combustion test compared to cyclohexene. Create a free Team What is Teams? Learn more. Is cyclohexane saturated or unsaturated? Ask Question. Asked 3 years, 5 months ago. Active 2 years, 6 months ago.
Viewed 3k times. Improve this question. Simon-Nail-It 4, 15 15 gold badges 45 45 silver badges 74 74 bronze badges. Rigved Sanku Rigved Sanku 19 1 1 silver badge 2 2 bronze badges. Obtain a small lump of calcium carbide from the reagent bottle and drop it into the beaker of water.
Place your thumb over the full test tube, invert it, and place the opening of the tube below the water level in the beaker. Remove your thumb, after the tube is in the water, and collect the acetylene glass, holding the tube over the bubbling sample. When the tube is full of gas, and before removing the tube from the water, place a stopper into the tube.
Repeat the collection of acetylene gas for the other two tubes, keeping the air in the tube before you collect more acetylene gas. Stopper these tubes as well. Test the contents of each tube as follows: Tube 1: Bring the mouth of the tube to the burner flame as you remove the stopper.
After the acetylene ignites, tilt the mouth of the tube up and down. Tube 2: Bring the mouth of the tube to the burner flame as you remove the stopper. Tube 3: Wrap the tube in a towel and bring the mouth of the tube to the burner flame as you remove the stopper.
What are your observations? Why do these different tubes appear to react differently? What other chemical is required for these reactions to proceed besides the acetylene in the tubes? Why is the tube with the least amount of acetylene Tube 3 the most explosive of the three? Solubility Tests Water is usually always used as a solvent for most experiments in chemistry.
However, water, which is a polar molecule, and many organic compounds, which are often not polar, at not miscible. Organic compounds which are soluble in water usually also contain polar bonds due to the presence of oxygen, such as the alcohols and acids.
MendelSet works best with JavaScript enabled. Please enable JavaScript. Properties of Hydrocarbons. Submitted by Matt on July 19, Printer-friendly version This week you will be doing experiments on several different hydrocarbons - compounds composed of carbon and hydrogen atoms. Important General Principles about Reactivity Saturated hydrocarbons alkanes are not as reactive as other hydrocarbons. Some reasons why: They have no double or triple bonds that can react with acid to form carbocations Carey CH 6.
Relative Density Most organic compounds, including hydrocarbons, are less dense than water density is less than 1. Flammability Most hydrocarbons will burn over a flame- the hydrocarbon reacts with oxygen to produce carbon dioxide and water. Addition of Bromine Br 2 As mentioned above, saturated hydrocarbons will only react with bromine under free radical conditions, meaning you have to add UV light.
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