its ore: [pic] Because both reduction and oxidation are going on side-by-side‚ this is known as a redox reaction. Oxidising and reducing agents An oxidising agent is substance which oxidises something else. In the above example‚ the iron(III) oxide is the oxidising agent. A reducing agent reduces something else. In the equation‚ the carbon monoxide is the reducing agent. • Oxidising agents give oxygen to another substance. • Reducing agents remove oxygen from another substance. Oxidation
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into the corresponding oxides and carbon dioxide. The temperature of decomposition depends upon the activity of the metal; that is to say‚ the more active the metal‚ the more stable is the carbonate. Thus‚ the carbonates of sodium and potassium are stable at the highest temperature of a Bunsen burner flame‚ whereas the carbonates of silver and copper are easily decomposed. In this experiment copper (ii) carbonate will be decomposed at a high temperature‚ forming copper (ii) oxide and carbon dioxide:
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Designation: C 114 – 07 Standard Test Methods for Chemical Analysis of Hydraulic Cement1 This standard is issued under the fixed designation C 114; the number immediately following the designation indicates the year of original adoption or‚ in the case of revision‚ the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. 1. Scope* 1.1 These test methods cover
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hollow block Many people used pure cement hollow block in making buildings but this research aims to make a more durable and fire retardant hollow block in making infrastructures. Background: The glass contains lime‚ magnesium oxide‚ and aluminum oxide that add more durability. Barium also increases the refractive index and low dispersion that make it endure shock. Plastics contain stabilizing additives that include fire retardants to lower the flammability of a material. These 2 combined
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1. 2. Sodium cloride Magnesium oxide Calcium bromide Aluminum sulphide Nickle (III) chloride (indicates charge) 3. CaBr2 4. Al3+ Ni3+ S2Cl- Al2S3 5. NiCl3 6. Sodium thiosulphate (complex ion) Na2S2O3 7. Aluminum silicate (complex ion) Al2(SiO3)3 (must bracket a complex ion with a subscript) 8. Ammonium phosphate NH4+ PO43- (NH4)3PO4 (bracket comples ion with a subscript) 9. Barium oxide Ba2+ O2- Ba2O2 BaO (written
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solution to adipic acid using an excess of strong nitric acid. This report deals with KA oil/cyclohexanol production by various routes‚ followed by the common step of nitric acid oxidation. KA oil production from cyclohexane by the cobalt catalyst and boric acid air oxidation routes is reviewed. Production of KA oil from phenol is also covered‚ as is the Asahi process for cyclohexanol production from benzene via cyclohexene. Appropriately adjusted nitric acid oxidation is appended to each of these
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per wafer UMC‚ http://www.umc.com.tw/english/process/a.asp MOSFET fabrication Metal-oxide-semiconductor field-effect transistor (MOSFET) Technology size: Distance between drain & source Robert F. Pierret‚ Field Effect Devices‚ p.72 MOSFET fabrication http://www.ecse.rpi.edu/~schubert/Course-ECSE-6290%20SDM-2/1%20MOSFET-2%20Fabrication.pdf Top view Field oxide Source Drain Channel length Safety Safety Issues • Variety of acids and bases
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number of moles of hydrogen ions in 100 cm3 of 0.100mol/dm3 hydrochloric acid. (ii) Give an ionic equation to represent the neutralization reaction. Q2. Manganese (IV) oxide catalyses the decomposition of aqueous hydrogen peroxides. In an experiment 50.0 cm3 of aqueous hydrogen peroxide was mixed with 0.50 g of manganese (IV) oxide. The total volume of oxygen formed was measured every 10 seconds. The results of the experiment are shown in the graph. (i) After how many seconds did the
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Metal Binary Salts Description Fixed Charge Metal* + a Nonmetal Rule: Full name of the metal + Stem on the nonmetal + the suffix “ide” Formula Name NaCl Sodium chloride CsF Cesium fluoride CaBr2 Calcium bromide MgO Magnesium oxide Li2S Lithium sulfide Al2O3 Aluminum oxide ZnH2 Zinc hydride AgI Silver iodide SrS Strontium sulfide Ca3N2 Calcium nitride K2Te Potassium telluride Na3N Sodium nitride CaC2 Calcium carbide LiH Lithium hydride Mg3P2 Magnesium phosphide Memorize your fixed charge metals
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OUR OWN HIGH SCHOOL‚ Al WARQA’A‚ DUBAI SUMMATIVE EXAMINATION-2‚ MARCH -2014 Name: ______________________________________ Grade: VII Sec: ____ M Marks: 90 Time: 2 1/2 hours Subject: SCIENCE Date: 09/04/2014 General Instructions: 1. This question paper has 4 pages. 2. All questions are compulsory. 3. Question numbers 1 to 10 are questions of one mark each. 4. Questions 11 to 16 are very short answer questions of two marks each. 5. Question numbers 17 to 24 are short answer questions of 3 marks each
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