Melanie Mickens February 21, 2014 Statement of Purpose: The purpose of this lab was to determine the freezing temperature of the pure solvent, lauric acid, as well as finding the freezing temperature of a mixture of lauric acid and benzoic acid. Along with that, the freezing point depression of a mixture was to be calculated and along with the molecular weight of benzoic acid. Background: Colligative properties are properties which depend only on the number of solute molecules present in a
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The purpose of this experiment was for the student to be able to perform the dehydrobromination of meso-stilbene dibromide in order to produce an alkyne, diphenylacetalyene. The dehydrobromination of meso-stilbene dibromide requires removal of two hydrogen bromides—in other words, a double elimination. In order for the elimination of the halogen to happen, the hydrogen being attacked and the leaving group need to be on the same plane. More specifically, the molecule has to be in an anti-periplanar
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Assignment- 6 6.a State of matter Student Name: Urbashi Dewan Student ID: UKDLP 7712 Course Title: IGCSE Combined Science We are all surrounding by a lots of matter. Everywhere we look we can found matter. In science, matter is such a thing that has mass and can takes up space. Generally, matter is not transparent like water. We can also observe matter. From this definition, we can say that matter has some criteria so
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called mobile phase. The mobile phase may be a gas or liquid. The mobile phase is then passed through another phase called stationary phase. The stationary phase may be a solid packed in a glass plate or a piece of chromatography paper. The various components of the mixture travel at different speeds, causing them to separate. There are different types of chromatographic techniques such as column chromatography, TLC, paper chromatography, and gas chromatography. Paper chromatography is one
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In this lab, the use of gas chromatography was used to separate a mixture of components. These components then underwent infrared spectroscopy in order to identify their identity. For this lab, the unknown mixture had the code 130-O. This unknown was identified as t-butyl alcohol and cyclopentanone. These compounds were isolated by using the GC and determining when to change vials. The determination of when to change vials came when the first peak began to level of at the bottom. This was around
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Gas laws apply in many everyday activities and daily necessities including air travel and recreation. Air medical services use gas laws in order to understand how the changes in altitude affect people, equipment and the internal environment of the aircraft. Several laws affect air travel including Boyle’s law, Henry’s law, Dalton’s law and Graham’s Law. Boyle’s law is relevant as it explains how pressure changes allow the gas to expand (Monroney, 2013). Dalton’s law transfers oxygen molecules from
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Mike's experimental setup is an example of a closed system. This is because the heat or energy can either come into or go from the system smoothly from the ballon and also to a much slighter degree, the Erlenmeyer flask, but in closed systems, the matter cannot come into or go from the system. This is also a closed system because matter cannot come into or go from the system if there are balloons involved which in this case, there is a balloon present. The way to utilize the information in this
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he was being transported to the air with other water droplets from oceans and plants around them, they all were turning in gas to form a cloud in the sky. That’s when evaporation comes to play evaporation is when a gas state (vapor) the sun’s light gives energy to the water, causing it to change from a liquid to a gas. Then which also helps is transpiration when another gas state. The process where plants release water vapor into the atmosphere. Then condensation
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nitrogen is that is a cheaper alternative as with argon gas you must have a continuous supply of gas which can become expensive in the long run, where as nitrogen is much cheaper as it can be used at normal atmosphere pressure it and will take a sample from a conventional nebuliser, another reason why nitrogen is desirable is due to it being non flammable and cheaper along with the fact that it produces simpler to read spectrums than argon gas What is meant by the term matrix effect? The matrix
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surface of the liquid when you suck which helps the liquid move up the straw. At sea level, the pressure is fourteen and a half pounds per square inch and reduces as you move higher. 43. When a steadily flowing gas flows from a larger diameter pipe to a smaller diameter pipe the speed of gas is decreases and pressure
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