AIM: To outline what a precipitation reaction is‚ describe ways which one can predict whether a precipitation reaction would form or not‚ describe the uses of precipitation reactions in everyday activities and industries BACKGROUND INFORMATION: Precipitation is the formation of a solid in a solution during a chemical reaction‚ such as evaporation. A substance that causes precipitation when it is added to a solution is called a precipitant. This can occur when an insoluble substance is formed in
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bicarbonate or sodium hydrogen bicarbonate is an alkali which is a white crystalline however it often appears as a fine powder‚ its chemical name is NaHCO3. It is used to increase the volume of baked goods. It has a slightly salty‚ alkaline taste resembling that of washing soda (sodium carbonate). (1) Baking Powder Baking Powder is also a dry leavening agent which is a mixture of a weak alkali and a weak acid; it increases the volume
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Symbol: Rb Atomic Weight: 85.4678 Say what? Rubidium is pronounced as roo-BID-ee-em. Discovery: R. Bunsen‚ G. Kirchoff 1861 (Germany)‚ discovered rubidium in the mineral petalite via its dark red spectral lines. Element Classification: Alkali Metal Density (g/cc): 1.532 Melting Point (K): 312.2 Boiling Point (K): 961 Appearance: soft‚ silvery-white‚ highly reactive metal Atomic Radius (pm): 248 Atomic Volume (cc/mol): 55.9 Covalent Radius (pm): 216
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and platinum. The same reaction is catalysed by the enzyme catalase‚ found in the liver‚ whose main function in the body is the removal of toxic byproducts ofmetabolism and the reduction of oxidative stress. The decomposition occurs more rapidly in alkali‚ so acid is often added as a stabilizer. The liberation of oxygen and energy in the decomposition has dangerous side-effects. Spilling high concentrations of hydrogen peroxide on a flammable substance can cause an immediate fire‚ which is further
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been a part of our daily live. It has been the oldest cleanser around. But have you ever asked yourself if all soaps are good for the skin? We tell you‚ not all soaps are good for the skin. Some soap leaves your skin feeling dry‚ itchy and tight. Alkali‚ the most common irritant in soap is often the culprit. Others ingredients in soap have been proven harmful to human health and can cause severe skin irritations in some people. These include ingredients such as DEA‚ Isopropyl Alcohol‚ BHT and Triclosan
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table‚ the horizontal rows are periods‚ and the vertical columns are called groups. Each group contains elements that have similar physical and chemical properties. The groups are numbered across the top of the chart. Elements in Group 1 are the alkali metals‚ elements in Group 2 are the alkaline earths‚ and Group 7 contains the halogens. Group 8 contains the noble gases‚ which are elements that are not very
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CHEMISTRY DETERMINATION OF ENTHALPY CHANGE OF NEUTRALIZATION IA Criteria Assessed: DCP CE MS Introduction When an alkali neutralizes an acid‚ a salt and water are formed. Aqueous hydrogen ions (H+(aq)) from the acid react with the hydroxide ions (OH- (aq)) from alkali‚ forming water. The identity of salt will depend on the nature of the acid and alkali used. H+(aq) + OH- (aq) → H2O(L) The combination of H+ and OH- ions in this way releases energy. In this practical‚ the enthalpy
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CHEMICAL ENGINEERING DEPARTMENT COLLEGE OF ENGINEERING XAVIER UNIVERSITY – ATENEO DE CAGAYAN CAGAYAN DE ORO CITY GAS ABSORPTION COLUMN - MASS TRANSFER EXPERIMENT B ChE 35 Chemical Engineering Laboratory II Acabo‚ Dean Cris Aguirre‚ Ian Carlo Belarmino‚ Arniel Catan‚ Charles John Engr. Marco Theodore E. Escaňo ChE 35 Instructor October 2012 OBJECTIVE: To calculate rate of absorption of carbon dioxide into water from analysis of liquid solutions flowing down the absorption column
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IGSCE Chemistry Notes Oxides Oxides are used to determine whether an element is a metal or a non-metal. Most non-metals are classed as acidic oxides. While most metals are classed as basicoxides. Acidic Oxides * Reacts with water to form acids * Neutralises alkaline solution to form salt + water Basic Oxides * Neutralises acidic solutions to form salt + water Amphoeteric Oxides * These are non-metals which display both acidic and basic properties Alkaline Oxides * Reacts
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Four elements‚ hydrogen‚ carbon‚ oxygen and nitrogen‚ are the major components of most organic compounds. Consequently‚ our understanding of organic chemistry must have‚ as a foundation‚ an appreciation of the electronic structure and properties of these elements. The truncated periodic table shown above provides the orbital electronic structure for the first eighteen elements (hydrogen through argon). According to the Aufbau principle‚ the electrons of an atom occupy quantum levels or orbitals starting
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