Bonding – Covalent and Metallic Bonding Organic Chemistry - Alkanes Organic Chemistry – Alkenes / Addition Polymerisation Organic Chemistry – Alcohols / Condensation Polymerisation Calculations Periodic Table Reactivity Series and Metal Extraction Electrolysis Energetics Acids‚ Bases‚ Salts and Neutralisation Preparing and Analysing Salts Rates Equilibria and the Haber Process -0- Page 1-6 7-8 9-10 11-14 14-17 18-19 20-22 23-32 33-39 40-44 45-48 49-51 52-58 59-63 64-65 66-70 Edexel IGCSE Chemistry
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A RESEARCH TOPIC ON THE IMPACT OF OIL SPILLAGE ON RURAL AREAS IN NIGERIA SUBMITTED TO COVENTRY UNIVERSITY ACADEMIC AND PROFESSIONAL SKILLS BY NWANNA ONYINYECHI RUTH STUDENT ID; 5423377 INTRODUCTION Oil spillage is the introduction of chemical hydrocarbon into the ecosystem. Such as lands‚ water systems‚ forest etc. which serves as a habitat for humans‚ mammals‚ birds‚ fishes
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Decomposition reaction is a chemical change when one substance is broken down into two or more products. These products can be any combination of elements and compounds. It’s usually difficult to predict the products of decomposition reactions. The electrolysis of water into oxygen and hydrogen gas is an example of a decomposition reaction. Double-replacement reaction is a chemical change involving the exchange of ions between two compounds. These reactions usually take place between two ionic
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Magnesium(s) = hydrochloric acid(aq) -> magnesium chloride(aq) = hydrogen(g) Q. 16. Wrte an activity to shw the change in the state of matter and change in temperature during a chemical reaction (change). Q. 17. Write an activity to show the electrolysis of water‚ as an example of decomposition reaction. Q. 18. Name different types of chemical reaction? Define them and give their example? Q. 19. What does the colour of copper sulphate solution change when an iron dipped in it? Q.20. Write
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goose bumps and makes hair "stand on end". 15. The outermost portion of the hair is known as the... Answer: A. Cuticle 16. The hair of the axilla is considered determinate/indeterminate hair (circle the correct answer). Answer: Determinate 17. Electrolysis is the process of hair removal by using electric current Explain how this might destroy the process of hair growth in relation to the hair bulb. Answer: It kills the hair bulb to stop the hair growth. Example is a women with facial unwanted
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Gallium was discovered by French chemist Paul E. Lecoq de Boisbaudran through a spectroscope in Paris. De Boisbaudran extracted gallium from a zinc blende ore from the Pyrenees and obtained .65 grams from 430 kilograms of ore. He isolated gallium by electrolysis of its hydroxide in potassium hydroxide solution. The origin of the name comes from the Latin word ‘Gallia’‚ which means France. Gallium is a chemical element with symbol Ga and atomic number 31. Gallium does not occur in free form in nature
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6. TREATMENT METHODS Screening‚ grit removal‚ flow equalization‚ sedimentation‚ or dissolved air flotation are used to reduce suspended solids (SS) load from sugar industry wastewater. Biological treatment includes aerobic and anaerobic process. Except biological methods‚ physico-chemical methods are also used for sugar industry wastewater treatment. 6.1 Biological methods Since‚ sugar industry wastewater contains mostly sugars and volatile fatty acids‚ which are easily biodegradable‚ therefore all
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the water. vi) Compare your findings with accepted values for water. Observations: One can observe the process of diffusion and the water changes its color‚ from clear to a yellowish solution. On one of the poles Nickel starts to accumulate (Electrolysis). Results: Mass of Beaker = 205‚23 g (0.205 kg) Mass of Beaker + Water = 391‚41 g (0.391 kg) Mass of Water = 186‚18 g (0.186 kg) Specific Heat Capacity of Water (15˚C) = 4186 J/kgC˚ V (v) I (amps) t (s) T (˚C) ∆T (˚C) ∆T / T voltage current
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discovered It was discovered by Sir Humphry Davy‚ J.L Gay-Lassac and Louis Jacques Thérnard in June 1808. It wasn’t recognized as an element until Sir Humphry Davy did its first isolation in July 1808. At first Sir Humphry Davy tried to create Boron by electrolysis of Borax‚ but in the end he decided to mix boric acid with potassium in a place where there was more hydrogen and he was happier with the results of Boron. J.L Gay-Lassac and Louis Jacques Thérnard also produced Boron by mixing boric acid with
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Do you like paying $3.78 for a gallon of gasoline? Well‚ as of May 16‚ 2008 that is the national average. You wake up knowing you need to fill the tank and the hair stands up on the back of your neck as you think of how much more the price has increased over night. It doesn’t have to be that way if you believe in the power of change. Hydrogen fuel is that change for the automobiles of the future. Hydrogen has been used for decades‚ but mostly for commercial use. Each year‚ we get closer to
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