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 AND LEAD Identify the cations that precipitate upon addition of two or three drops of sodium hydroxide but re-dissolve upon addition of excess sodium hydroxide. -Aluminum‚ zinc
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also be weakly bonded or more strongly as a ligand to form a complex ion‚ and these can also present in solid ‘hydrated’ salts of crystallization. For example‚ copper (II) nitrate (Cu(NO3)2∙3H2O) The metal complexes that contain at least one ammonia (NH3) ligand are called metal ammine complexes. Metal acetylacetonates are coordination complexes derived from the acetylacetonate anion(acac) and metal ions. The coordination number of a complex ion is the number of coordinate bonds being formed
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Name: __________________________________ ( ) Class: 4Q HWA CHONG INSTITUTION PRELIMINARY EXAMINATION 2010 CHEMISTRY 5072 Paper 1 Time: 1 hour INSTRUCTIONS TO CANDIDATES Do not turn the pages over until you are told to do so. Write your name and index number on the answer sheet in the spaces provided. There are forty questions on this paper. Attempt all questions. For each question‚ there are four possible answers labelled A‚ B‚ C and D. Choose the one you consider correct and
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Amines and Amides Amine - an ammonia molecule (NH3) in which one or more H atoms are substituted by an alkyl or aromatic group. Amide - an organic compound with a carbonyl functional group (C=O) bonded to a nitrogen atom. Amines are the smaller and simpler products of the decomposition of larger and more complex organic compounds like proteins. They often have foul odours‚ as do many nitrogen compounds‚ such as the smell of rotting fish and decomposing animal tissue and are produced by
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|8 – 9 | |(B) Ammonia and its salt | | |Manufacture of ammonia |10 – 11 | |Properties of ammonia |12 | |The uses and preparation of ammonia
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SO42- will decrease‚ indicating that solubility has decreased. In this experiment‚ the groups will learn the equilibria which concerns more on a saturated solutions of ammonium chloride‚ which exists in equilibrium with ammonia‚ consequently ammonium ion is a weak acid and ammonia is a weak base. OBJECTIVE: To know the effects of adding solutions of strong acid‚
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or symbiotic bacteria. These bacteria have the nitrogenase enzyme that combines gaseous nitrogen with hydrogen to produce ammonia‚ which is then further converted by the bacteria to make their own organic compounds. Some nitrogen fixing bacteria‚ such as Rhizobium‚ live in the root nodules of legumes (such as peas or beans). Here they form a mutualisticrelationship with the plant‚ producing ammonia in exchange for carbohydrates. Nutrient-poor soils can be planted with legumes to enrich them with nitrogen. A
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unwanted products of metabolism and of substances present in excess within the organism. Animals excrete nitrogenous waste products such as ammonia‚ uric acid or urea. These or similar products to that produced by the deamination of any excess protein that has been eaten as nitrogenous compounds are formed in metabolism of proteins and nucleic acids. Ammonia is lost by diffusion from small aquatic organisms but more complex animals such as mammals rely on kidneys to filter wastes out of the blood
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Isaac Solar Ice Maker Solar Icemaker Up to 1000 pounds of ice per day! Low cost and reliable source of ice for situations requiring 25 to 1000 pounds of ice per day (12-450kg). "Isaac" is the acronym for Intermittent Solar Ammonia Absorption Cycle. Ammonia absorption refrigeration technology was developed in the 19th century and is still used in industrial applications. Energy Concepts has adopted this technology to a machine which uses the sun as the only energy output. The particular advances
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acid-base reactions are so important is that many of the things you come into contact with on a daily basis are either acids or bases. Most fruits are acids‚ as are carbonated beverages‚ tea‚ and battery acid. Common household bases include baking soda‚ ammonia‚ soap‚ and antacids. What are acids and bases? There are not one but three common definitions used to describe acids and bases: 1. Arrhenius acids and bases 2. Brønsted-Lowry acids and bases 3. Lewis acids and bases. These three definitions
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