Study of the first element – Hydrogen. Answer the following questions:- 1. Give a reason why hydrogen can be placed in group 1[IA] and group 17[vIIA] of the periodic table. 2. What similarities does it show with group 1[IA] and group 17[VIIA]. With special reference to valency electrons and ion formaton and examples. 3. How does hydrogen occur in the free and combined state? 4. Which metals react with cold‚steam and boiling water to form their respected oxides and hydroxides ? Give examples and
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1. Identify the functional group or molecule for each of the following. (3 points) 1. COOH -OH 2. COH -OH 3. COH -OH 1. List whether each of the following substances was positive or negative for reducing sugar‚ as indicated by the Benedict’s test. (6 points) 1. corn syrup (1 point) positive 2. table sugar (1 point) positive 3. unknown 1 (1 point) negative 4. unknown 2 (1 point) negative 5. unknown 3 (1 point) positive 6. unknown 4 (1 point)
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Objectives 1. To determine biochemical activities of microorganisms. 2. To observe the product of biochemical activities of microorganisms. 3. To learn the skills of inoculation agar tubes and agar plates. Introduction Microorganisms are able to carry out different biochemical activities with the ease of different enzymes. Each of these enzymes carries out one specific type of the chemical transformation. They convert substrates into product. A) Carbohydrates Fermentation Microorganisms utilize
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sulfuric acid to each test tube. 3. Record the observations. 4. Repeat the experiment with 2mol/L sulfuric acid Risk assessment * Conc. sulfuric acid is highly corrosive * If conc. Sulfuric acid is spilt‚ do not add water * Hydrogen sulfide gas Results | Observations | | Conc. Sulfuric acid | 2 mol/L sulfuric acid | Copper | No observable change | No observable change | Zinc | No observable change | No observable change | Iron | * Exothermic reaction *
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IRON (METAL) Iron is a chemical element with the symbol Fe (from Latin: ferrum) and atomic number 26. It is a metal in the first transition series. It is the most common element (by mass) forming the planet Earth as a whole‚ forming much of Earth’s outer and inner core. It is the fourth most common element in the Earth’s crust. Iron’s very common presence in rocky planets like Earth is due to its abundant production as a result of fusion in high-mass stars‚ Like other group 8 elements‚ iron
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E.‚ “The evolution‚ chemistry and applications of chelated iron hydrogen sulfide removal and oxidation processes”‚ J. Mol. Cat. A.‚ 117 (1)‚ 289-297 (1997). their iron complexes”‚ Inorg. Chim. Acta.‚ 278 (2)‚ 170-177 (1998). S8 by molecular oxygen”‚ Inorg. Chim. Acta.‚ 299 (1)‚ 9-15 (2000). Piché‚ S.‚ Ribeiro‚ N.‚ Bacaoui‚ A.‚ “Assessment of a redox alkaline/iron-chelate absorption process for the removal of dilute hydrogen sulfide in air emissions”‚ Chem. Eng. Sci.‚ 60 (22)‚ 6452-6461 (2005). Eaton
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General Oilfield Safety Supply General Safety and Health[ Safety and Health Program ] | | | 1. General Safety and Health Resources 2. Slips‚ Trips‚ and Falls 3. Strains and Sprains General Safety and Health Resources : * Crane‚ Derrick‚ and Hoist Safety. OSHA Safety and Health Topics Page * Electrical. OSHA Safety and Health Topics Page. * Fire Safety. OSHA Safety and Health Topics Page. * Hand and Power Tools. OSHA Safety and Health Topics
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Hydrogen and the Noble Gases Hydrogen is the chemical element with atomic number 1. It is represented by the symbol “H”. It is an odorless‚ nonmetallic‚ tasteless and highly explosive gas. Hydrogen is the lightest and most abundant chemical element in the universe. It forms 1- ions when combined with metals‚ and 1+ ion when combined with non-metals to form acids. Hydrogen is “the fuel of life”; without it to combine with oxygen we would not have water. Water is made of two parts hydrogen
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SCH4U 03/04/13 Hydrogen Bonding Purpose: The purpose of this investigation is to test the concept of hydrogen bonding. Hypothesis: Given the concept of hydrogen bonding I predict that the bulky glycerol molecules limits the number of possible hydrogen bonds. If water is mixed with glycerol should make it possible for water to form many hydrogen bonds with the glycerol molecules‚ causing it to become a exothermic reaction. Because glycerol has more possibilities for hydrogen bonding I believe
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Hydrogen Automobiles The effect of pollution that is emitted from vehicles is a serious concern in today ’s society. The cause of this pollution is the toxic emissions from current vehicles. This toxic emissions or pollution destroys the Earth ’s ozone layer or atmospheric gases Acknowledging these facts‚ many are very concerned with the condition of the Earth ’s atmospheric gases in the future. In just a very short time‚ scientists produced a new vehicle which only emits water out of its exhaust
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