SYLLABUS Cambridge O Level Chemistry 5070 For examination in June and November 2014 University of Cambridge International Examinations retains the copyright on all its publications. Registered Centres are permitted to copy material from this booklet for their own internal use. However‚ we cannot give permission to Centres to photocopy any material that is acknowledged to a third party even for internal use within a Centre. © University of Cambridge International Examinations 2011 Contents
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------------------------------------------------- Titration From Wikipedia‚ the free encyclopedia (Redirected from Back titration) Not to be confused with the mathematical notion of tetration. This article is about volumetric titration. For other uses‚ see Titration (disambiguation). A Winkler titration to determine the concentration of dissolved oxygen in a water sample Titration‚ also known as titrimetry‚[1] is a common laboratory method of quantitative chemical analysis that is used
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Section A (Answer ALL questions in this Section.) 1. Rubidium (Rb) and potassium belong to the same group in the Periodic Table. The relative atomic mass of rubidium is larger than that of potassium. (a) Explain whether rubidium is more reactive than potassium. (b) Write a chemical equation for the reaction between rubidium and water. (State symbols should be given.) (c) Suggest how rubidium can be stored safely in the laboratory. (d) Suggest ONE safety precaution for handling
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hydroxyl group. The carboxyl functional group may be attached to an alkyl group or an aromatic group. Benzoic acid‚ is a colourless crystalline solid and a simple aromatic carboxylic acid. It is mainly consumed in the production of phenol by oxidation decarboxylation at 300-400. Oxidizing a primary alcohol can produce carboxylic acids. In this experiment‚ an aromatic carboxylic acids namely benzoic acid will be prepared by oxidizing benzyl alcohol‚ which is an aromatic alcohol with the formula
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These fatty acids are called free fatty acids (FFA). Free fatty acids can used as an immediate source of energy by many organs and can be converted by the liver into ketone bodies. Free fatty acid form during the breakdown of lipid by hydrolysis and oxidation. Thus‚ free fatty acid is hydrolyses from dietary lipid for absorption or utilize for lipid synthesize. Free fatty acid play important role in food system and our body system also too .Free fatty acid is same with unsaturated fatty acid‚ which is
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Chemical Formulas and Chemical Compounds MIXED REVIEW SHORT ANSWER Answer the following questions in the space provided. 1. Write formulas for the following compounds: CuCO3 a. copper(II) carbonate Na2SO3 b. sodium sulfite (NH4)3PO4 c. ammonium phosphate SnS2 d. tin(IV) sulfide HNO2 e. nitrous acid 2. Write the Stock names for the following compounds: magnesium perchlorate a. Mg(ClO4)2 iron(II) nitrate b. Fe(NO3)2 iron(III) nitrite c. Fe(NO2)3 cobalt(II) oxide d. CoO nitrogen(V) oxide
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AP Chemistry Final Exam Review ESSAY. Write your answer in the space provided or on a separate sheet of paper. 1) Explain the difference between a qualitative and a quantitative measurement. Provide examples to illustrate this difference. Answer: A qualitative measurement is a measurement that gives descriptive‚ nonnumeric results; a quantitative measurement is a measurement that gives definite‚ usually numeric results. "The rock is heavy" would be a qualitative measurement. "The rock weighs 110
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manipulation of a molecule‚ be it in oxidation‚ reduction‚ or in the addition of a functional group. In this lab we will examine the stereoselectivity of the reduction of 4-tert-butylcyclohexanone (Figure 1) using sodium borohydride (Figure 2). In the first week of this lab we will use sodium hypochlorite (Figure 3) to oxidize (Mechanism: Figure 6) commercial 4-tert-butylcyclohexanol‚ synthesizing 4-tert-butylcyclohexanone and using IR analysis to confirm that our oxidation was successful. In the second
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Naming Chemical Compounds General Information: Scientists all around the globe use a standard method for naming chemical compounds. The standards were set up by an international committee sponsored by the International Union of Pure and Applied Chemistry (IUPAC). Having this standard makes life easier for people who use these compounds everyday. It would be tough to set up any experiment if scientists everywhere used different names for the same compound. It would also make the lab a
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calibrate other standards referred to as working standards. Examples of primary standards for titration of acids are: Sodium carbonate‚ tris-hydroxylmethyl amino methane. Examples of primary standards for titration of bases are: Potassium hydrogen phthalate and potassium hydrogen iodate Examples of primary standards for redox titrations are: Potassium dichromate (K2Cr2O7 )and sodium oxalate (Na2C2O4) A secondary standard is a standard that is prepared in the laboratory for specific analysis. It is
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