The Chemistry of Lipids Experiment #8 Objective To observe the solubility of lipids in polar and nonpolar solvents and to compare saturated and unsaturated fats in their chemical reaction with bromine. The percent fat in a food will be determined by extraction of the fat and weighing it. Introduction Lipids‚ by definition‚ are natural substances that do not mix with water but dissolve in organic solvents. There are several classes of lipids‚ including: fatty acids‚ waxes‚ triacylglycerols
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Major Chemistry questions: 1. Analyse the progress in the development and use of a named bioploymer. This anslysis should name the specific enzyme(s) used or organism used to synthesise the material and an evaluation of the use or potential use of the polymer produced related to it’s properties. Polyhydroxybutanoate (PHB) Progress Analysis: - Bacteria first used to make PHB in 1925 at Pastuer Institute in Paris. - In 1970’s adopted by Imperial Chemical Industries (ICI) – Alcaligenes
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Environmental Chemistry: Water testing in Bouregreg Valley Nowadays we are more and more concerned of environmental issues and especially the ones about water since experts have remarked that wetland regions are disappearing (50% reduction). Wetland regions are very important because they help preserve different wildlife species and also can be considered important indicators of the health of the “blue planet”. One of the most interesting wetland regions is the Bouregreg one that is close to
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Chemistry Coursework – Titration Background Science A titration is the neutralisation of an acid or an alkali. To achieve this‚ one must be added to the other in a specific amount‚ strength and concentration. A substance is neutral when its pH is 7. It is most acidic closer to 0 and is most alkaline closer to 14. 28492453194050 0 7 14 595423979670
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The chemistry of hairspray What is hairspray: introduction Hair spray (or hair lacquer) is a common household aqueous solution that is used to keep hair stiff or in a certain style. Weaker than hair gel‚ hair wax‚ or glue‚ it is sprayed to hold styles for a short period of time. Using a pump or aerosol spray nozzle it sprays evenly over the hair. Hairspray was first developed and manufactured in 1948 by Chase Products Company‚ based in Broadview‚ Illinois.Its active ingredient is a suitable
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Chemistry in Photography Background A photograph is an image made by a photo-chemical reaction which records the impression of light on a surface coated with silver atoms. The reaction is possible due to the light-sensitive properties of silver halide crystals. Equation form for silver halides: Ag + + e - Ag Species produced include: Ag2+‚ Ag2o‚ Ag3+‚ Ag3o‚ Ag4+‚ Ag4o In 1556‚ the alchemist Fabricius was the first to discover that light can photochemically react with these crystals to
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Regents Chemistry Quarter 1 Midterm Review 1. The percent by mass of oxygen in Na2SO4 (formula mass = 142) is closest to 1) 11% 3) 45% 2) 22% 4) 64% 2. Given the unbalanced equation: __Al(s) + __O2(g) → __Al2O3(s) 3. 4. 5. 6. 7. balance the equation using smallest whole number coefficients. The percent by mass of aluminum in Al2O3 is approximately 1) 18.9 3) 47.1 2) 35.4 4) 52.9 What is the approximate percent composition by mass of CaBr2 (formula mass = 200)
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Name: Shahid Hussain Subject: Chemistry Teacher: Dr Ramani Topic: Comparing Solutions Saturated Solutions | A solution that can hold no more of the solute at a particular temperature is said to be a saturated solution at that temperature. | When someone adds sugar to iced tea‚ the sugar disappears. If you add one teaspoon of sugar to iced tea‚ you get an unsaturated solution. If you keep
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Chemistry Notes Cracking: * 2 types of Cracking; Catalytic cracking and Steam/thermal cracking. * Catalytic cracking‚ using a catalyst called Zeolite (Aluminosilicate)‚ 500 degrees C‚ in the absence of air and at pressures just above atmospheric * Thermal cracking is done without a catalyst; steam is passed through very hot metal tubes at 700-1000 degrees C at just above atmospheric pressure. * This is used to break down longer chains of unsalable hydrocarbons into smaller salable
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I Term Exam Chemistry Project Sunday‚ January 13‚ 2013 Grade/Section: Date: Question I: State whether each statement is true or false‚ then correct each incorrect statement. (7pts‚ 1 point each) 1- An Element is a substance that can be broken down into simpler substance by chemical means. 2- The Aufbau Principle states that energy levels must be filled from the highest to the lowest‚ when writing the election configuration. 3- Atomic radius decreases across a period
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