Balancing chemical equations 1. Complete the following sentences‚ using the words or groups of words in the box below. You may use some words more than once. |• as small as possible |• decrease |• molecules |• quantities | |• balance |• different |• nature |• rearranging | |• bonds |• equal
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that produce a precipitate Iron & HCl1. Fe3+3HCl- FeCl3+3H 2. Pb2+2HCl- PbCl2+2H 3. Ag+HCl- AgCl+H4. Al(NO3)3 + 3NaOH = Al(OH)3+3NaNO3 5. Zinc & NH36. Al3+3NaOH Al+3NaNO3 7. 2Ca+ + 2NaOH Ca(OH)2 + 2NaNO3 8. 2 NaOH + Cu Cu2 + 2OH 9. Zn2+ 2NaOH Zn(OH)2+2Na Identify the cations that precipitate with hydrochloric acid and dissolve in the presence of ammonia -Iron Identify the cations that precipitate with hydrochloric acid and do not redissolve in the presence of ammonia -SILVER
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Chemistry Review (mid-term) 1. Use the equation for atomic mass to answer the following questions. (http://johnheilchem10.escuelacampoalegre.wikispaces.net/file/view/average+atomic+mass+calculations+-+3.pdf) 1. Argon has three naturally occurring isotopes: argon-36‚ argon-38‚ and argon-40. Based on argon’sreported atomic mass‚ which isotope do you think is the most abundant in nature? Explain. 2. Copper is made of two isotopes. Copper-63 is 69.17% abundant and it has a mass of 62.9296 amu.
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Diploma Programme Chemistry data booklet First examinations 2009 Diploma Programme Chemistry data booklet First published March 2007 Revised edition published September 2008 International Baccalaureate Peterson House‚ Malthouse Avenue‚ Cardiff Gate Cardiff‚ Wales GB CF23 8GL United Kingdom Phone: +44 29 2054 7777 Fax: +44 29 2054 7778 Website: http://www.ibo.org © International Baccalaureate Organization 2008 The International Baccalaureate (IB) offers three high quality and
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GRAAD 12 NATIONAL SENIOR CERTIFICATE GRADE 11 PHYSICAL SCIENCES: CHEMISTRY (P2) EXEMPLAR 2013 MARKS: 150 TIME: 3 hours This question paper consists of 13 pages‚ 1 data sheet and a periodic table. Copyright reserved Please turn over Physical Sciences/P2 2 NSC – Grade 11 Exemplar DBE/2013 INSTRUCTIONS AND INFORMATION 1. Write your name in the appropriate space on the ANSWER BOOK. 2. This question paper consists of TWELVE questions. Answer ALL the questions in the ANSWER BOOK. 3. You
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AIM TO STUDY THE VARIATION OF CONDUCTANCE WITH CHANGE IN DISTANCE‚MOLARITY AND TEMPRATURE. CERTIFICATE I have the pleasure to certify that RAGHUVANSH SINGH BHALLA student of class XII (Science) of J.D. Tytler School has persuade his work and prepared the dissertation on the topic. To study the variation of conductance with change in distance‚ molarity and temperature . Under my supervision and guidance‚ this is being submitted for
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aqueous sulphurous acid H2SO3 aqueous carbonic acid H2CO3 aqueous sulphuric acid H2SO4 aquous nitric acid HNO3 aquous hydrochloric acid HCl aqueous potassium hydroxide KOH aqueous sodium hydroxide NAOH copper(II) sulphate solution CuSO4 Electrolysis of Molten Compounds Molten/aqueous ionic
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dark blue/purple and light blue/gray where drop hit paper Became very hot‚ bubbled‚ produced gas No reaction‚ not soluble Cu Bronze metallic balls No smell Turned grey and moved around tube insoluble Insoluble‚ boiled fast‚ gave off gas Red= got damp‚ turned dark pink Blue= turned dark blue/purple and light blue/gray where drop hit paper No reaction No reaction Zn Big metallic pieces No smell Shriveled and turned grayish Insoluble Insoluble‚ gave off gas Red= got damp‚ turned dark
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aqueous solution of CH3COOH exhibits a pH of 2.87‚ predict the pH of a 0.10 M aqueous solution of NaCH3COO at the same temperature. (1) 5.12 (2) 8.87 (3) 9.33 (4) 10.23 (5) 11.13 2. It is determined that a maximum of 2.055 g of Zn(IO3)2 will dissolve in 500. mL of pure water at 25°C. From this information‚ estimate the ΔG°rxn for the dissolution of zinc iodate at 25°C. (1) 26.4 kJ/mol (2) 22.9 kJ/mol (3) 34.3 kJ/mol (4) 30.9 kJ/mol (5) 36.0 kJ/mol
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most popular Natural Minerals * Aluminum/ Bauxite (Al203.3H20): Australia is the largest producer of both bauxite and alumina in the world. Bauxite is mined in Queensland‚ the Northern Territory‚ and Western Australia. * Copper (Cu): In Australia‚ copper is found mainly in rocks more than 250 million years old. Australia’s main mines are located in South Australia and in Queensland. Australia has approximately 6% of the world’s copper. * Diamond:
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