How reaction rate varies with sodium thiosulphate concentration Background information Sodium thiosulphate and hydrochloric acid are both colourless liquids‚ when the two reactants are reacted together they produce sulphur. The sulphur that is produced from the reaction changes the solution to yellow and cloudy‚ this is a precipitation reaction‚ where a two solutions react and a solid forms in the solution‚ the solid is said to precipitate out. Some reactions will occur quickly such as fireworks
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Practical 2.1- The Effect of Temperature on Membranes Objective To investigate the effect of temperature on membrane structure Introduction Beetroot Pigments Beetroots contain Betalains which are the red pigments present in the cell vacuole. Betalains are soluble in water and they contain nitrogen. Betalains extracted from beetroot is commonly used as food dye because it is not known to cause any allergic reactions. Beetroot Picture taken from http://tipdeck/how-to-cook-beet-root Structure
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Experiment 5: Percent Water in a Hydrated Salt Chemistry 1300 Instructor: 2/8/12 Abstract: The purpose of this experiment was to determine the percent by mass in a hydrated salt‚ as well as to learn to handle laboratory apparatus without touching it. The hydrated salt‚ calcium carbonate‚ was heated with high temperature to release water molecules. Gravimetric analysis was used in this experiment to determine the percent by mass of water in a hydrated salt. The hypothesis of this experiment
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Memorandum To: Urban Planning Department From: Name Subject: Rise of Temperature in Urcity Date: Introduction Agricultural areas all over the world are feeling the effects of suburb expansion. The cities growth is having an effect on the ability of land‚ water‚ and animals. With city growth will create problems such as climate‚ land‚ and geographical changes (Hillel‚ 1995). Critical Findings The agricultural areas of UrCity are being forced further out into the desert basin due
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Ranking Salt Solutions by pH 6-2: Ranking Salt Solutions by pH In this assignment you will be asked to rank aqueous solutions of acids‚ bases‚ and salts in order of increasing pH. This is most easily done by first identifying the strong acids that have the lowest pH‚ the strong bases that have the highest pH‚ and the neutral solutions that have a pH near 7. The weak acids will have a pH between 1 and 6 and the weak bases between 8 and 14. The exact order of weak acids and
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Electrolytic Solutions Solutions are sometimes grouped according to their ability to conduct electricity. Substances whose solutions conduct electricity are called electrolytes and those that do not conduct electricity are called nonelectrolytes. Also electrolytes can be strong or weak. Under strong electrolytes we have NaCl and CaCl2 which are ionic compounds‚ HCI‚ HNO3‚ HBr and H2SO4 are under acids and NaOH‚ KOH‚ and LiOH are under bases. Weak electrolytes are ionic compounds and slightly
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majority carriers in a p-type material. 4) The quantum-Volt (qV) is the unit of measurement for electron energy. 5) A free electron has a higher energy state than any that are bound to their nucleus. 6) Si and Ge both have negative temperature coefficients. 7) The amount of energy that is converted to heat at a silicon p-n junction can be a significant design consideration. 8) A normalized value has a reference magnitude of one. 9) The reverse breakdown voltage of an LED is
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investigate the effect of temperature on the enzyme catalase. The original research question was exploring the effect temperature would have on a yeast catalase reacting with hydrogen peroxide (H2O2). To address the latter question a series of experiments were conducted. The various temperatures experimented with were as follows: 22 degrees Celsius (room temperature)‚ 0 degrees Celsius (freezing)‚ 100 degrees Celsius (boiling)‚ and 37 degrees Celsius. Along with variations in temperature‚ the experiment involved
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Chemistry Lab Introduction: Panacetin purportedly includes sucrose‚ aspirin‚ and acetaminophen. However‚ the accuracy of Panacetin’s contents has been called into question by the Association for Safe Pharmaceuticals. Therefore‚ the lab must discover the accuracy of the ingredients listed on Panacetin’s label. The unknown in this experiment is presumed to be something similar to acetaminophen‚ such as acetanilide or phenacetin. Recrystallization and melting point temperature were used
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CHAPTER 10 CRITICISMS OF ABSORPTION COST SYSTEMS: INCENTIVE TO OVER-PRODUCE P 10-1: Solution to Federal Mixing (10 minutes) [Explaining absorption versus variable costing] Variable costing writes off to income all fixed manufacturing costs incurred during the year. Absorption costing prorates the fixed overheads between units in inventory and units sold based on machine hours. Absorption costing net income is higher than under variable costing by $1.2 million. This means that inventories
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