Felicity Tyler Aim: To produce and test for hydrogen gas. Materials: * rubber stopper * dilute hydrochloric acid (HCI) * zinc pieces (Zn) * test-tube rack * matches * dilute sulphuric acid (H2SO4) * 2 cm strips of magnesium ribbon (Mg) * Iron pieces (Fe) * Test-tube Method 1. Test the different metals with the acids by separately combining each piece of metal with 5mL of acid in a test-tube. 2. Cover the opening of the test-tube with the rubber stopper
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Calculate the enthalpy change for the reaction. 2. Magnesium will also displace copper from copper (II) sulphate solution. If an excess of magnesium is added to 100 cm3 of 1.0 moldm-3 copper(II) sulphate‚ the temperature increases by 46.3 oC. a) Calculate the molar enthalpy change for the reaction b) Calculate the minimum quantity of magnesium required to ensure it is in excess. c) Calculate the temperature change if only 0.8 g of magnesium is added. 3. When 5.73 g of sodium chloride
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of solid reactant‚ and the pressure. To prove this theory‚ I will holding a rate of reaction experiment. I will investigate how the difference of hydrochloric acid affect the rate of reaction in 30 seconds reaction between hydrochloric acid and magnesium with balanced equation of Mg + 2HCl → MgCl2 + H2. According to the chemguide website‚ by increasing the concentration of the reactant the particles will become more crowded and there is a greater chance of the particles colliding.
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Objective: To find the redox reactions between a metal and dilute acid‚ metal-metal ion displacement and halogen displacement reaction. Materials: Test tubes (8)‚ pea size samples of the following metals; copper‚ lead‚ magnesium and zinc (10 ml)‚ 2M hydrochloric
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Meeker burner Ring stand Iron ring Wire gauze Forceps Sulfur Iron filings Sodium Bicarbonate Sodium Chloride Sugar Sand Magnesium ribbon Hydrochloric Acid Distilled water Filter paper 9 disposable dishes Procedure: 1. Label 7 of the dishes with the names of the following products: Sulfur‚ Iron‚ Sodium Bicarbonate‚ Sodium Chloride‚ Sugar‚ Sand‚ and Magnesium. Place small samples of each in the appropriate dishes. 2. Examine each sample with a magnifying glass and magnet and record your
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Introduction In order to determine the content of calcium and magnesium in an unknown sample of limestone‚ the utilization of atomic absorption spectrophotometry can help in deciphering the unknown concentrations of each molecule in the limestone sample. Atomic absorption spectrophotometry‚ emits radiation of the correct frequency that is passed through a flame and the intensity of the transmitted radiation is measured¹.The calcium concentration or ppm can be measured using the absorbance of the
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HKCEE Chemistry 2007 Paper 1 Section A 1. A is a compound formed from oxygen and magnesium‚ while B is a compound formed from oxygen and fluorine. a) Draw the electronic diagram of A‚ showing electrons in he outermost shells only. (1) b) Draw the electronic diagram of B‚ showing electrons in the outermost shells only. (1) c) Compare the melting points of A and B. Explains your answer. Melting point of A is higher than that of B. Ions of A are linked by strong ionic bonds /
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copper(II) nitrate‚ lead(II) nitrate‚ magnesium sulfate and dilute(3M) sulfuric acid. The copper metal strip was placed in the silver nitrate and dilute(3M) sulfuric acid‚ the lead metal strip was placed in the copper(II) nitrate and the zinc metal strip was placed in the lead(II) nitrate‚ magnesium sulfate and dilute(3M) sulfuric acid. Overall‚ putting these different strips of metal into different solutions will help determine the reactivity of copper‚ lead‚ zinc‚ magnesium‚ silver and hydrogen.
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preventing the magnesium from reacting with water at room temperature? Do you think magnesium would react faster in hot water? Explain. The oxide layer of magnesium prevents it from reacting with water at room temperature due to low activation energy. In hot water‚ magnesium reacts faster and vigorously as the kinetic energy of the reactants increases with a rise in temperature. This is because it has greater activation energy which is enough to broken down the insoluble layer of magnesium oxide due to
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experiment you will find out how increasing the concentration of the acid solution changes the rate of the reaction between dilute hydrochloric acid and magnesium metal. • As the metal reacts with the acid‚ hydrogen gas is produced and the metal dissolves. To get an estimate of the rate of reaction‚ the time taken for a small piece of magnesium ribbon to dissolve (disappear) can be measured. This is a “clock reaction” and the reaction rate is proportional to 1/time taken SAFETY Dilute hydrochloric
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