• Igcse chem questions
    questions on the paper. 1. A student studied the effect of temperature on the rate of reaction between hydrochloric acid and sodium thiosulphate. The student mixed 50 cm3 of a sodium thiosulphate solution and 5 cm3 of hydrochloric acid in a flask. The flask was placed over a cross. The student timed how...
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  • Open Ended Investigation – Energy Release Rates
    Investigation – Energy Release Rates Part 1 – Research 1. A combustion reaction involves the burning of a substance, usually in air, to produce heat and light energy. The actual rate at which a combustion reaction takes place depends on many factors; combustion reactions can occur in a slow, spontaneous...
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  • Speed of Chemical Reactions - Prac Report
    speed of chemical reactions – class experiment By Julia Shuker Year 10 science – Miss Phillips – Term 2 – 2013 – Julia Shuker Aim The aim of the experiment was to investigate the factors that increased or decreased the speed of chemical reactions between two different...
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  • factors effecting reaction rates (chem lab)
    Concentration, and a Catalyst on Reaction Rate Introduction: Chemical reactions can be affected by a number of different factors. Particle size, temperature, concentration of a solution, and catalysts play a big role in the rate of reaction, they determine how fast a reaction will occur. According to the...
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  • Chemistry, Rate of Reaction
    Factors Affecting Rates of Reaction Thanks to Michelle Craig Manitoba Curriculum Chemistry Grade 12; Kinetics, Topic 3-08 Objectives To design short experiments to investigate and explain qualitatively using collision theory the relationship between reaction rate and temperature, concentration...
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  • Pdf Polluting
    and III B II and IV D I, II and IV The following industries are found in Malaysia. Which of the following are chemical-based industries? I Oleo-fatty acid industry II Soap and detergent manufacture III Plastic industry IV Petroleum industry A I and II B II and III C I, II and III D I, II, III and IV Which...
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  • ychbuvytcrxx 6fymkmp0jp89by
    hbwiudlBWEFp ieN[IENFnew nOEFNC Jewfw]fj]w0r dEJNFC]-0http://www.studymode.com/essays/Does-Temperature-Affect-The-Reaction-Rate-96472.html Additional Science Chemistry Coursework sources. http://www.docbrown.info/page03/AT1rates.htm http://www.alkaseltzer.com/as/student_experiment1.html http://papers...
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  • Activity Series of Metals
    chemical activity of metals with oxygen, water, acid and alkali, to rank metals in order of their activity. Aim: To observe the reactivity of metals in order to determine the activity series of metals. Risk Assessment: In this investigation, hydrochloric acid solution is used which is toxic by all routes...
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  • OCR GCSE Chemistry Textbook C6 Chemical Synthesis
    know • Atoms are rearranged during chemical reactions. • The number of atoms of each element stays the same in a chemical reaction. • Raw materials can be used to make synthetic materials. • Alkalis neutralise acids to make salts. • Chemical reactions can be represented by word equations and...
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  • Pest
    the effects of three different concentration of hydrochloric acid on two different metals, which will be zinc and magnesium. Hypothesis: I think that zinc will react faster giving off more hydrogen gas if it has a higher concentration of hydrochloric acid and magnesium will react slower. Variables: ...
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  • The End of the World
    of compounds 2.3 Reactions of Acid 2.4 Displacement of Metals 2.5 Double decomposition reaction 2.6 Others 3 CALCULATIONS 3.1 3.2 3.3 3.4 3.5 3.6 4 Relative Masses Mole and Number of particles Mole and Mass & Volume of Gases Empirical and Molecular Formulae Calculations involving Acids and Alkali Thermochemistry...
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  • DETERMINATION OF THE THICKNESS OF ZINC
    DETERMINATION OF THE THICKNESS OF ZINC ON A PIECE OF GALVANIZED METAL Department of Biology, College of Science, University of the Philippines Baguio ABSTRACT The experiment was performed to be able to determine the thickness of zinc on a piece of galvanized metal. It also aimed for the students...
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  • The Effect of Concentration of H2O2 on the Docomposition of Hydrogen Peroxide
    What happens? For many reactions involving liquids or gases, increasing the concentration of the reactants increases the rate of reaction. In a few cases, increasing the concentration of one of the reactants may have little noticeable effect of the rate. These cases are discussed and explained further...
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  • The Effect of Temperature on Rate of Reaction
    The effect of temperature on a reaction rate In this experiment I shall be investigating how temperature affects the rate of reaction Rates of reaction The Factors that affect the rate of reaction are temperature, surface area, concentration, catalysts, light and pressure Surface area –...
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  • The Fadl
    1. This question is about the reaction between propanone and an excess of ethane-1,2-diol, the equation for which is given below. [pic] In a typical procedure, a mixture of 1.00 g of propanone, 5.00 g of ethane-1,2-diol and 0.100 g of benzenesulphonic acid, C6H5SO3H, is heated under reflux...
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  • slkjfdlsk
     Reaction Rates Select the alternative that correctly answers the following questions. The next two questions refer to the information below. In the extraction of iron in the blast furnace, a mixture of iron ore, coke (form of carbon) and limestone is used. The overall reaction is: ...
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  • Testing the Reactivity of Metal
    the reactivity series. Background Information: By using various experiment, the reactivity of the metals can be deduced by the observation of the reaction. Hypothesis: Metals with low ionisation energy will lose their their electron more easily providing a more vicious and obvious result, as compared...
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  • Ibchemistry
    Processing Aspect 1: Raw Data Quantitative data: 3.000±0.001g zinc and 20.0±0.5ml 2mol/dm3 hydrochloric acid are measured for each trial of the experiment. Water bath is used to create and maintain the initiate temperature of 40℃ for the reaction to occur. Afterwards, different temperature of 45℃, 50℃, 55℃...
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  • Chemistry
    can smell the ugly scent of trash. This is because molecules from the garbage diffused out of the can to the air which you breathed in. Diffusion rate depends on several factors, these are:   5 Mass of the substance. The lighter the substance (lower Mr or Ar) the faster it diffuses Temperature...
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  • Chemistry Revision
    Atoms, Molecules and Ions. AN ATOM is the smallest particle of an element. They cannot be split into smaller particles in chemical reactions. Iron is made of iron atoms (Fe). Sulphur is made of sulphur atoms (S) A MOLECULE is a small group of atoms joined together. The atoms may be the...
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