Observations: Part I: Reaction between iron and oxygen Appearance of steel wool after 20 minutes From (relatively) shiny metal strips to notsoshiny strips that are stained with dark‚ reddishbrown stuff. Part II: Decomposition of hydrogen peroxide Appearance of potato and hydrogen peroxide combination: Lots of white‚ foamy bubbles around the potato slices. Day 2 Observations: Part III: Reaction between zinc and acetic acid Appearance of penny in vinegar after 30 minutes: Pretty dark coloured
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burner - dropper pipet - 5 test tubes - mortar and pestle - test tube rack - magnet - test tube holder - insulating pad - watch glass - safety goggles - glass square - lab apron or coat - copper sulfate pentahydrate - iron fillings - sodium chloride - magnesium ribbon - hydrochloric acid - paper (5 cm x 10 cm) - silver nitarate - birthday candle - sulfur - matches Procedure: 1. Place a small amount of wax from a birthday candle into a test tube
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Rust is the name given to the common compound (Fe2O3) when iron combines with oxygen to form iron oxide. Rusting is known as corrosion of iron and its alloys such as steel or cast irons. Rust can be found on cars‚ metal pipes‚ aircrafts and anywhere with iron‚ copper and aluminium. Corrosion can be concentrated locally to form a split or crack‚ or it can extend across a wide area which causes corroding on surfaces. Because corrosion is a diffusion-controlled process‚ it occurs mainly on exposed surfaces
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key. Henan Hongxing Mining Machinery Co.‚ Ltd is a large-sized peripheral driving thickener‚ mineral feeding machine manufacturer‚ and the mining equipment we researched and developed with great concentration plays an active role in the mining and ore beneficiation industry and is one of the indispensable mining crushing equipment in the mining industry. Now using the universal mainly coke and coal gas. The new technology is the most ideal or gas‚ including blast furnace gas‚ converter gas‚ coke
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EM/JUNE14/MEC281 UNIVERSITI TEKNOLOGI MARA MEC281 MATERIAL SCIENCE Chapter 1: Structure TUTORIAL 1: Atomic Structure 1. Define : i. Atomic Mass ii. Atomic Number iii. Isotopes 2. Give the electron configurations for the following ions : i. Oxygen ii. P5+ iii. Ni2+ iv. Br- v. Cu PERIODIC TABLE MEC 281 EM/JUNE2014/MEC281 UNIVERSITI TEKNOLOGI MARA MEC281 MATERIAL SCIENCE Chapter 1: Structure TUTORIAL 2: INTERATOMIC BONDING‚ CRYSTAL STRUCTURES 1. Specify the type of atomic
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Vitamin A Overview Vitamin A is a vitamin. It can be found in many fruits‚ vegetables‚ eggs‚ whole milk‚ butter‚ fortified margarine‚ meat‚ and oily saltwater fish. It can also be made in a laboratory. Uses treatment and prevention of vitamin A deficiency. Vitamin A deficiency can occur in people with protein deficiency‚ diabetes‚ over-active thyroid‚ fever‚ liver disease‚ cystic fibrosis‚ or an inherited disorder called abetalipoproteinemia. Diseases i. Night Blindness: In the early stages
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Lab Report for Chemical Changes and Conservation of Mass Lab Previous to the reaction‚ the magnesium appeared to be a solid‚ white‚ black‚ and grey substance with many small dark particles within the substance. The hydrochloric acid was a clear liquid that looked like water It weighed 42.2 grams in total. During the reaction‚ the two substances produced bubbles‚ creating smoke and became warm with a smell that is irritating to the human nose. After the reaction‚ it appeared to be a clear‚ bubbly
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Oxidation Lab Part 1: Purpose: You are going to investigate the ease with which different metals undergo oxidation and reduction. Materials: | 4 samples of each of: lead‚ zinc‚ iron‚ copper | spot plates steel wool/sand paper | | | | Solutions of: | copper(II) sulfate Ferric nitrate Silver nitrate Lead (II) nitrate | | Procedure: 1. Obtain 4 samples of each metal and clean with steel wool or sand paper. Wash your hands after cleaning the metals so you are not exposed to lead
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Determination of Manganese in Steel Submitted by: ------------------- Date of Submission: 27.03.11 Objectives: In steel production aside the iron‚ which is the primary source‚ some amounts of manganese is used together with carbon. The objective of this experiment is determining the manganese amount in the steel compound by using UNICAM UV-VIS Spectrometer. Theory: Many molecules absorb ultraviolet or visible light. The absorbance of a solution increases
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the substance. Oxidation: Also known commonly as rusting‚ this process combines oxygen molecules with the mineral ions such as iron‚ calcium or magnesium. Oxygen is normally taken from the moisture in soil or air. Subsequently‚ it results in reduction of the mineral to a less stable compound. A typical example is conversion of iron (Fe) radicals into rust or iron oxide (Fe2O3) which is weaker. Reference:
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