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Ethyne Gas Combustion Reaction Lab

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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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Chemical compounds that are available to determine are CaCO3, CaCl2, Ca(NO3)2, mgCl2, MgSO4, KCl, HCl, HC2H3O2, KNO3, K2SO4, NaC2H3O2, Na2CO3, NaCl, Na2SO4, HNO3, H2SO4, HNO3, H2SO4, NH4Cl, (NH4)2SO4, K2CO3, 0.1 M AgNO3, 0.2 M BaCl, Mg(s), NaOH, and KOH. To start this experiment, start with the flame test by gathering a Bunsen burner and a Nichrome wire. Connect the Bunsen burner with a rubber tube to a laboratory gas. To prepare solutions for the flame test, weigh out 0.205 gram of Unknown Compound using an analytical balance and mixed it into a 140 mL beaker filled with 20 mL ionized water. Ensure that solid is completely dissolved using a stirring rod.

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Some compounds have very distinctive colors when burned, such as Potassium, which is a white/purple, and sodium, which is a deep red hue. The first step for a flame test is to gather the needed materials. These include beakers, distilled water, the unknown substance, a Bunsen burner, matches, a nichrome wire, tubing to connect the gas line to the Bunsen burner, goggles, and known compounds to compare with. The first step is to make aqueous solutions of all the substances to be tested. This is done by adding .5

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The cylinder was adjusted to the water level because that kept the pressure on the tube and the water inside at a constant rate throughout the tube. If the graduated cylinder had not been adjusted, the test would have been introduced to a random error because it would have been a flaw that was always present and would affect the measurements of the experiment. When the unknown anti-acid was tested the first time, the results yielded a 40.2% yield of CO2. The second trial of part B was not as accurate due to using a mass of the unknown-acid that was too small for accurate results. The lack of accuracy came from a lack of precision which resulted in a human error because the amount that was broken off and selected for the trial was too small.

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Introduction: This lab report discusses an experiment to study the difference in the burn rate of various colored candles. The objective of this experiment is to analyse the outcome of burning 5 different colored candles including white under the same control variable for 60 minutes. The white candles used in this experiment are pure and no chemicals or dyes are added to it. They are normally made from paraffin wax with a wick in the middle.

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