Heat of Formation of Magnesium Oxide Objetive: To determine the heat formation of MgO (Magnesium Oxide) using Hess’s Law‚ which states the heat within a chemical reaction is independent of the pathway between the initial and final states. Introduction: Chemical reactions require heat energy to complete‚ called an endothermic reaction‚ or produce heat energy‚ and thus called an exothermic reaction. The heat energy produced by such reactions can be measured using a calorimeter‚ a piece
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Purpose To investigate the mass changes involved in burning magnesium metal. Materials Stirring rod Retort stand Ring clamp Clay triangle Crucible and lid Bunsen burner Flint lighter Balance Crucible tongs 40 cm of magnesium ribbon Method 1. Find the mass of a clean crucible and lid. USE THE SAME BALANCE DURING THE ENTIRE EXPERIMENT. 2. Curl the magnesium ribbon around a pencil to make a size that just fits inside the crucible. Do not curl the ribbon too tightly.
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Chemistry Practical Report: Topic: Determining the Empirical Formula of Magnesium Oxide Patrick Doan 11 CHEM 11 26/9/08 Table of contents 1.0 Aim 1 2.0 Theory 2-3 3.0 Materials 4 4.0 Method 4 5.0 Results 4 - 5.1 Qualitative Observations 4 - 5.2 Example Calculations for each Calculated Value 5-7 -5.21 Experimental Values and Associated Errors 5-7 - 5.3 Accumulated Raw Data 8 - 5.4 Mean Experimental
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Formula of Silver Oxide Purpose: To find the percent composition and empirical formula of silver oxide can then be calculated‚ based on combining the ratios of silver and oxygen in the reaction. Hypothesis: Silver oxide decomposes to silver metal and oxygen when strongly heated. Heating Silver oxide causes the oxygen to be driven off‚ leaving only the silver metal behind. The total mass of the products of a chemical reaction must equal the mass of the reactants. Mass of silver oxide = Mass of silver
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one of several iron oxides and a member of the spinal group. It is black or brownish-black with a metallic luster‚ has a Mohs hardness of 5–6 and a black streak. Hematite‚ also spelled as hematite‚ is the mineral form of iron (III) oxide (Fe2O3)‚ one of several iron oxides. Hematite is a mineral‚ colored black to steel or silver-gray‚ brown to reddish brown‚ or red. It is mined as the main ore of iron. Limonite is an iron ore consisting of a mixture of hydrated iron (III) oxide-hydroxides in varying
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Design Objective: Find the standard molar enthalpy of combustion for magnesium. Manipulated Variables- volume of HCl‚ length of magnesium strip‚ mass of magnesium oxide‚ Controlled Variable- type of calorimeter (Styrofoam cup) Responding Variable- change in temperature Procedure: 1. Cut out 3 pieces of magnesium strips each with lengths of maximum 5 centimeters. 2. Measure and record the lengths of the magnesium. 3. Scrub the magnesium strips with steel wool to clean out impurities
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The purpose of this lab was to find the empirical formula for magnesium oxide. To find this formula‚ a strip of Magnesium ribbon was burned in a crucible over a flame from a bunson burner. After the strip caught fire multiple times with the cover on‚ and 10 drops of distilled water were added‚ and the crucible was lightly heated. The crucible was then weighed and the mass recorded. Calculations were performed and the mole ratio of Mg to O was recorded. The results of other lab groups performing
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|`Subject Area Code |Preliminaries | |Time Allocation | | |Subject Area |Introduction | | | | |Instructional Hours (min) |
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roads‚ as white pigment or filler in products such as toothpaste or paints‚ and it is the raw material for the manufacture of quicklime (calcium oxide)‚ slaked lime (calcium hydroxide)‚ cement and mortar. Limestone reactions in word and symbol equations .Calcium Carbonate = Calcium Oxide + Carbon Dioxide. CaCO3 + heat =CaO + CO2. .Calcium Oxide+ Water = Calcium Hydroxide CaO + H2O = CaHO2. .Calcium Hydroxide + Carbon Dioxide = Calcium Carbonate + Water CaHO2+ CO2 = CaCO3 +
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monoxide (CO)‚ oxides of nitrogen (NOx)‚ volatile organic compounds (VOCs) and particulates‚ which have an increasing impact on air quality. In addition‚ photochemical reactions resulting from the action of sunlight on nitrogen dioxide and volatile organic compound from vehicles leads to the formation of ozone‚ a secondary long range pollutant‚ which impacts in rural areas often far from the original emission site. Acid rain is another long range pollutant influenced by vehicle nitrogen oxide emissions
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