"Magnesium" Essays and Research Papers

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determination of emperical formula

Locker# 1137 Date of Experiment: May 11, 2014 Date of Submission: May 16, 2014 Purpose: To determine the identity of an unknown hydrated salt calculating the percent water loss after heating and also to determine the empirical formula of magnesium oxide. Results: Table 1: Determination of the mass of waters of hydration of an unknown hydrated compound. Hydrated Compound code: C-14 Mass (g) Crucible + Lid 30.581g Crucible + Lid + Hydrated compound 31.590g Hydrated Compound 1.004g ...

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Science

on the reaction of magnesium and salt water to produce hydrogen: Mg (s) + 2H2O (l) -> Mg2+ (aq) + H2 (g) ↑ + 2OH- (aq) s: solid; l: liquid; g: gaseous; aq: in solution; the vertical arrow indicates that gas is released. This reaction is very slow, due to passivation, so to speed it up, iron and salt are added. Passivation is the process by which a material is made less reactive, usually by the deposition of a layer of oxide on its surface: if you place a strip of magnesium into cold water, its...

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Tie Dye Grignard Synthesis

and bleached cotton fabrics. Introduction: In this experiment a Grignard reaction is performed with a Grignard reagent acting as the nucleophile1. Grignard reactions are very useful for the substitution of compounds containing magnesium onto other compounds. The magnesium on a Grignard reagent withdraws electron density from the attached carbon giving it a partial negative charge1 (Figure 2). This allows the Grignard reagent to be used as a nucleophile in a substitution reaction1. The dye methyl...

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Investigatory Project. Banana Peel

Statement of the problem. What are the other alternatives that we can do on that banana peels aside from making it as fertilizer? C. Scope and Delimitation Base on our knowledge, the magnesium and potassium that are on the table of elements, gives vitamins on our tooth. We think that if potassium and magnesium gives vitamins on our tooth, it is possible that it can whiten our tooth D. Significance of the study The Benefits of the banana peel to whiten our teeth is to make some people save more...

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Physical and Chemical Change Lab

pieces of paper. Put two pieces of magnesium ribbon on the paper labeled “Magnesium”. 2. Examine each substance with a magnifying glass. Record observations in Data Table 1. 3. Test the effect of a magnet on each substance by passing the magnet under the paper. 4. Test the solubility of each substance by mixing small amounts in a separate test tube with 3mL of distilled water in it, then “flick” each tube to mix the contents. 5. Return strip of magnesium in test tube to its paper. Follow...

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An Ice Calorimeter Determination of Reaction Enthalpy

Thermochemistry: An Ice Calorimeter Determination of Reaction Enthalpy D. F. Nachman 6/23/2010 Abstract: An ice calorimeter was used to study the reaction of magnesium metal and 1.00M sulfuric acid solution: Mg(s) + H2SO4(aq) →MgSO4(aq) + H2(g). We found the experimental molar enthalpy of reaction to be ΔH = –355 ± 17 kJ/mol at 0°C, 24% lower than the textbook value of ΔH° = –466.9 kJ/mol, reported at 25°C. Introduction Whether a chemical reaction occurs spontaneously or is driven by an...

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Law of Constant Composition Lab: Magnesium and Oxygen

Purpose: To determine the percent magnesium by mass in magnesium oxide and to observe if the percentage composition is constant by comparing class results. Hypothesis/Prediction: The percent composition by mass of magnesium in magnesium oxide will not change significantly with each group that conducted the experiment. The composition of each substance should stay the same and any differences must be due to some error. Materials:Magnesium stripCrucibleCrucible coverClay triangleIron ringRetort standTongsBalanceBunsen...

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Chemical Reactions: Combustion Lab Worksheet and Rubric

Lead (II) nitrate and potassium iodide solutions  6. Pour about 2.0 mL of lead (II) nitrate into the test tube. Add 5 to 10 drops of potassium  iodide solution to the test tube and record your observations of the reaction.  7.   8.   9. Magnesium metal and hydrochloric acid solution  10. Place one scoop of magnesium turnings into the test tube. Add hydrochloric acid  slowly and observe the reaction. Next, place a burning splint near the mouth of the test  tube to test for the presence of hydrogen gas.  11.   12.   13. Electrolysis of water ...

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Gringard Synthesis

extremely reactive chemical compounds used in the synthesis of hydrocarbons, alcohols, carboxylic acids, and other compounds. A gringard reagent is an organic magnesium halide dissolved in a nonreactive solvent (like diethyl ether). The substance is made up of an organic group joined by a high polar covalent bond to magnesium, while magnesium is joined by an ionic bond to a halogen (like bromide) a gringard reagent will react with water, oxygen or almost any other electrophilic organic compound to...

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Reactivity Series Investigation Page1

Experiment on Metals Aim-To find out which of these metals will be most reactive with hydrochloric acid,and plan an investigation to test it out.The Metals given:Calcium,Aluminium,Iron,Magnesium and Zinc. Prediction-I predict that the metal will be the most reactive with hydrocholoric acid is calcium because calcium is in Group 2 which is the alkaline earth metals in the periodic table and because calcium is at the extreme left side of the periodic table and as you go across a period,the element...

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