encountered Combustion reaction (burning) element + oxygen → oxide e.g. 4Na (S) + O2 (g) → Na2O (s) Reaction with hydrogen element + hydrogen → hydride e.g. Ca (s) + H2 (g) → CaH2 (s) Reaction between an oxide and water metallic oxide + water → hydroxide * metallic oxide is also known as “basic oxide” e.g. Na2O (s) + H2O (l) → 2NaOH (aq) non-metallic oxide + water → acid * non-metallic oxide is known as “acidic oxide” e.g. SO2 (g) + H2O (l) → H2SO3 (aq) Reaction between active
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IB CHEMISTRY LAB REPORT PRACTICAL 13 : HESS’SLAW PRACTICAL ASSESSMENT : DCP‚CE Collecting raw data: Part 1 Weight of magnesium ribbon‚Mg‚m/g (± 0.01) Initial temperature of hydrocloric acid‚HCl‚T/C (± 0.05) Final tmperature of HCl + Mg‚T/C (± 0.05) 0.31 26.00 57.50 Part 2 Weight of magnesium oxide‚MgO‚m/g (± 0.01) Initial temperature of hydrocloric acid‚HCl‚T/C (± 0.05) Final tmperature of HCl + Mg)‚T/C (± 0.05) 0.50 27.50 40.50 Processing
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composition Classify common substances as acidic‚ basic or neutral * An acid is a substance which in solution produces hydrogen ions‚ H+ or more strictly H3O+‚ sometimes called hydronium ions * A base is a substance which either contains the oxide O2- or hydroxide ion OH- or which in solution produces the hydroxide ion. * A soluble base is called an alkali Common properties of all acids: * Sour taste * String or burn the skin * In solution‚ acids conduct electricity * Turns
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and oxygen are known to form two compounds. The carbon content in one of these is 42.9% while in the other is 27.3%. Show that this data is in agreement with the law of multiple proportions. 5. On analysis‚ it was found that black oxide of copper and red oxide of copper contained 79.9% and 88.8% of copper respectively. Show that this data is in accordance with the law of multiple proportions. 6. Calculate the mass of 1 molecule of nitrogen 7. Calculate the mass of 1 molecule of water and
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explains that in a cation replacement reaction‚ “One cation replaces another” and in an anion replacement reaction‚ “one anion replaces another from its solution.” When magnesium and copper sulfate react‚ a single replacement reaction occurs‚ and copper and magnesium sulfate are produced (Mg + CuSO4 MgSO4 + Cu). In this example‚ magnesium is above copper in the activity series so it is able to displace copper. An example of an anion replacement reaction is the reaction of bromine and potassium iodide
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Chemistry 1 Revision Booklet Unit Chemistry 1 Syllabus At the beginning of each sub-section‚ activities are stated which develop candidates. skills‚ knowledge and understanding of how science works. Details are then given of the substantive contexts in which these skills‚ knowledge and understanding should be set. It is expected that‚ where appropriate‚ teachers will adopt a practical approach‚ enabling candidates to develop skills in addition to procedural knowledge and understanding. Note that
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Reflectance Calculated Stability Factor SOLE HEATED OVEN: (52/2) % Moisture % - 6 Mesh BDT ET Contraction 52/2 DRY BASIS: 27.45 9.47 63.08 14‚078 7821 0.86 MAF MINERAL ANALYSIS: Silicon Dioxide SiO2 Aluminum Oxide Al2O3 Iron Oxide Fe2O3 Calcium Oxide CaO Magnesium Oxide MgO Sodium Oxide Na2O Potassium Oxide K2O Titanium Dioxide TiO2 Phos. Pentoxide P2O5 Sulfur Trioxide SO3 DRY BASIS 55.75 26.81 7.39 1.70 1.03 0.56 2.59 1.33 0.37 1.27 15‚551
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Dynamic Chemistry Matter – Any substance that has volume & mass. E.g. EVERY THING Atom – The smallest non living thing that can exist. Atomic Structure – Particle | Symbol | Location | Charge | Mass | Proton | P | Nucleus | +1 | 1Heavy | Neutron | N | Nucleus | 0 | 1Heavy | Electron | E | Electron Shell or Orbit | -1 | 12000Light | History of the Atom – The model of the atom has changed with time. Dalton – solid shape (no subatomic particles) (indivisible particle) Rutherford
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education *4308315385* CHEMISTRY Paper 2 Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name in the spaces at the top of this page. Write in dark blue or black pen. You may need to use a pencil for any diagrams‚ graphs or rough working. Do not use staples‚ paper clips‚ highlighters‚ glue or correction
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g mol-1 d) 477 g mol-1 3. What mass of the compound FeWO4 contains 50.0 grams of tungsten (atomic symbol W‚ atomic number = 74)? a) 30.0 g FeWO4 b) 304 g FeWO4 c) 82.6 g FeWO4 d) 188 g FeWO4 d) FeSO4 4. A compound contains 20.2% magnesium‚ 39.8% titanium‚ and 40.0% oxygen by mass. What is the empirical formula of this compound? a) MgTiO b) MgTi2O3 c) Mg2TiO4 d) MgTiO3 5. Which of the following DOES NOT contain 4.00 moles of oxygen atoms? a) 2.00 moles of CO2 b) 128.0 g of
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