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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December 2010‚ pp. 1593-1600 Characterization and photocatalytic activity of SiO2-TiO2 mixed oxide nanoparticles prepared by sol-gel method Ali Mahyar*‚ Mohammad Ali Behnajady & Naser Modirshahla Department of Applied Chemistry‚ Faculty of Science‚ Islamic Azad University‚ Tabriz Branch‚ Tabriz‚ Iran Email: alimahyar@hotmail.com Received 9 August 2010; revised and accepted 15 November 2010 SiO2-TiO2 mixed oxides have been prepared by sol-gel technique from titanium tetraisopropoxide and tetraethylorthosilicate
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Test 2 Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Find the combination that will give a gas as a product A. AgNO3(aq) + NaI(aq) B. HCl(aq) + Na2CO3 (aq) C. MgCl2(aq) + K2CO 3 (aq) D. CaSO4 (aq) + (NH4)3 PO4(aq) 1) A) A B) C C) B D) D 2) 2) The balanced molecular equation for complete neutralization of H2 SO4 by KOH in aqueous solution is __________. A) 2H+ (aq) + 2OH- (aq)
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Training Schedule for In plant Training It was magnificence 22 (From 24 Sep to 22 oct 2011) days training period in The IBN Sina pharmaceutical Industry Ltd. |Sl No. |Section |Date |Duration (Day) | |01 |Liquid |24‚25 Sep-2011 |2 | |02 |Tablet
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diseases as well as failed yield for fruits and seed crops. Limit the uptake of other nutrient‚ which is magnesium or potassium. Older leaves at the bottom of plant will start to become yellowish (chlorosis) while the rest of the plant’s leaves will be light green. Calcium (Ca) Newer leaves at the top of the plant will be distorted and have irregular shape. Blossom rot-end also may occur. Magnesium Centre of leaf has green arrowhead (Mg) due to yellowing of edges of the leaves. Phosphorus (P) Burnt
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yield were 80.46% and 47.526%‚ respectively. A melting point range of 85-87oC was obtained from the purified product. - Introduction A Grignard reaction adds an alkyl-magnesium halide to an aldehyde or ketone carbonyl carbon. The alkyl-magnesium halide is known as the Grignard reagent. The carbon bonded to the magnesium
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ore‚ and • Purification of the metal. It is also called ‘Refining’. Stages of extraction of metals: After the concentration of the ore is done‚ there are two main steps or stages in extractive metallurgy. They are: Conversion of the ore into Metal oxide or metal compound. Extraction of crude metal from metal from metal compound. Concentration of ores: Removal of the unwanted materials (e.g.‚ sand‚ clays‚ etc.) from the ore is known as concentration‚ dressing or benefaction. It involves several steps
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concentration of hydrochloric acid and magnesium‚ from there I will monitor the gas (hydrogen) produced and analyse the results. Prediction: I predict the higher the molarity of the hydrochloric acid the faster the rate of reaction therefore the quicker the gas will be produced in the specific time interval. Overview of the experiment: In this reaction two substances will be present in the solution‚ magnesium and hydrochloric acid. During the reaction magnesium particles will collide with the
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Si + 2H2O → SiO2 + 2H2 The oxidation process can be implemented through diffusion of either water or an oxygen species through the oxide already formed up which then reacts with the silicon at the Si-SiO2 interface. At high temperature‚ thermal energy makes oxygen molecule moving much faster‚ which can drive them to diffuse across an existing oxide layer and react with Si to form SiO2. As the oxidation continues‚ the interface moves into the silicon and a new‚ clean silicon surface is produced
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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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