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Ethyne Gas Combustion Reaction Lab

1113 Words5 Pages

Purpose: The purpose of this lab is to prepare various ratios of ethyne (C2H2) to air solutions and observe the combustion reaction when said solution is lit. The reaction between a dilute (0.1 mole per litre) aqueous solution of potassium permanganate (KMnO4), calcium carbide (CaC2) and ethyne is also to be investigated. Procedure: All the instruments and materials used in the lab were inspected for faults and potential dangers. A camera was set up so that the reactions may be captured and replayed. For the first four ethyne gas combustion reactions, preparation was made by ensuring the beaker was approximately three-fourth (¾) filled with water. A test tube was fully filled with water and its mouth covered by a piece of paper towel. The …show more content…

At this point, the correct setup was the completely filled test tube’s mouth touching the bottom of the beaker. A piece of calcium carbide (CaC2) was added into the beaker using a pair of tweezers and was subsequently trapped within the test tube so that the gases produced were collected. The inverted test tube was fully filled by the gas released in the reaction between calcium carbide and water. Note that additional pieces of calcium carbide were added when the reaction begun to slow down. The bunsen burner was ignited and one end of a wooden spit was lit While the orientation of the test tube was maintained, the burning wood spit was introduced to the mouth of the test tube. Observations were noted …show more content…

It was found that the reaction was limited to taking place to only the mouth of the test tube, as it is the only place where a mostly yellow and orange flame burned, which was opening downwards. The part of the flame that is furthest from the mouth glowed blue. During the reaction, very little sound was produced to the extent that one can only hear it in a quiet room. In addition, very large amounts of black soot was produced continuously throughout the entire reaction, which congregated towards the mouth of the test tube so that the amount of soot decreased as the distance between it and the mouth of the test tube

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