IGCSE PRE-AICE CHEMISTRY 0620 OFFICIAL STUDY GUIDE Notes: To avoid any confusion concerning the symbol for litre‚ dm3 will be used in place of l or litre.Valence electrons are known as valency electrons for this test. Nature of Matter The states of matter are solid‚ liquid‚ and gas‚ in respective order of kinetic energy. State of Matter | Definite Volume | Definite Shape | Solid | Yes | Yes | Liquid | Yes | No | Gas | No | No | Diffusion:
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Particles can join up with other particles of the same type to form molecules. Examples: Hydrogen = H2 . This means there are two atoms of hydrogen joined together to form a molecule of hydrogen gas. Oxygen = O2‚ Nitrogen is H2‚ Chlorine is Cl2. A compound is a pure substance of two or more elements chemically combined together in a set ratio. Example: Water = H20 this means there are always 2 atoms of Hydrogen and 1 atom of Oxygen in every molecule of water. [pic] A Mixture is made of two
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Exercise 14: Qualitative Anion Tests PURPOSE: The purpose of this experiment is to identify some commonly occurring anions & to study some of the reactions used for their identification. PROCEDURE: You must first determine to which of the three groups the various anions belong. Since no two people observe the same event in exactly the same way it is important to also conduct specific confirmation tests on the known samples of each anion. This information will help identify the anion
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N-dimethylaniline. Materials (Chemicals) Sulfanilic acid‚ 2.5% aqueous sodium carbonate solution‚ sodium nitrite‚ concentrated hydrochloric acid‚ N‚N-dimethylaniline‚ glacial acetic acid‚ 10% aqueous sodium hydroxide‚ saturated sodium chloride solution Apparatus 50 mL Erlemeyer flask‚ 250 mL beaker‚ test tube‚ hot plate‚ Buchner funnels Procedure In a 50 mL Elermenyer flask 1.2 g of sulfanilic acid and 12.5 mL of 2.5% aqueous sodium carbonate solution was placed. The flask was warmed on a hot plate until
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reaction taking place and it gives them a better understanding of how chemical reactions work and what products they may form. Materials & Procedure Materials: * Wood Splints - Copper Sulfate * Sodium Sulfate - Copper Wire * Barium Chloride - 6% Hydrogen Peroxide * Mossy Zinc - Copper Sulfate Pentahydrate * Hydrochloric Acid - Iron Filings * Manganese Dioxide Procedure: Reaction A Place a scoop of copper (II) sulfate pentahydrate crystals in a clean
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® Copying is permitted according to the Site Licence Conditions only keep it simple science Preliminary Chemistry Topic 2 METALS What is this topic about? To keep it as simple as possible‚ (K.I.S.S.) this topic involves the study of: 1. OUR USE of METALS 2. CHEMICAL ACTIVITY of the METALS 3. PATTERNS of the PERIODIC TABLE 4. QUANTITY CALCULATIONS... the MOLE 5. METALS from their ORES ...all in the context of how Chemistry contributes to cultural development but first‚ an introduction
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Organic Reagent - 1.5 mL in Vial 2 Pipet‚ Empty Short Stem 1 Silver Nitrate‚ 0.1 N - 6 mL in White Dropper Bottle 1 Sodium Bromide‚ 0.1 M - 2.5 mL in Pipet 1 Sodium Carbonate‚ 0.25 M - 2.5 mL in Pipet 1 Sodium Chloride‚ 0.1 M - 2.5 mL in Pipet 1 Sodium Iodide‚ 0.1 M - 2.5 mL in Pipet 1 Sodium Phosphate‚ 0.1 M - 2.5 mL in Pipet 1 Sodium Sulfate‚ 0.1 M - 2.5 mL in Pipet 1 Sodium Sulfide‚ 0.1 M - 2.5 mL in Pipet 1 Unknown - 5 mL in Pipet 1 Lead Acetate Strips - 2 in Bag 2"x 3" – Assembly Procedure
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Chemical #1 Seashell Calcium Carbonate - CaO3 Density | * 2.71 g/cm3 (calcite) * 2.83 g/cm3 (aragonite) | Exact mass | * 100.0869 g/mol | Molecular Formula | * CaO3 | Melting point | * 825 °C (calcite) * 1339 °C (aragonite) | Boiling point | * Decomposes | Acidity | * 9.0 | Flash point | * Non flammable | Crystal structure | * Trigonal | Other names | * Limestone‚ Marble‚ Chalk‚ Calcite and pearl. | Calcium carbonate is a chemical compound with
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Experiment #3 Mark A. Bruder 07. T.A. Michael Hall Alkanes: Chlorination Introduction: The purpose of this experiment is to determine the reactivity of hydrogen atoms on a carbon chain using free radical chlorination. In this experiment 1-chlorobutane will be chlorinated with the combination of sulfuryl chloride and ABCN as an initiator to produce the chlorine radicals. The combination of 1-chlorobutane and sulfur chloride will produce four dichlorobutane
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How fast is your reaction? Part 1 – How temperature affect the rate of reaction Chemical equation Magnesium + hydrochloric acid → magnesium chloride + hydrogen Mg + 2HCL → MgCl2 + H2 Graph Conclusion and questions 1. What factors/variables did you keep the same in this experiment? * We kept the same volume of hydrochloric acid (10 cm3) and the magnesium ribbon (5cm) because that way we could get a fair test experiment. We also repeated
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