(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 metals and water active metal + water (liquid or gas) → hydroxide + hydrogen gas e.g. 2K (s) + 2H2O
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produce a gas that burns with a pop sound when a flaming wooden splint is placed near it.liqiud y is most likely a compound that has the formula a.c2h5oh b.hcooh c.h3cooch3 d.c6h14 3.a compound p has the following characteristics: -reacts with sodium carbonate to release a gas that clouds lime water -reacts with compound q to form a fragrant liquid a.p-sulphuric acid q-ethyl ethanoate b.p-ethanoic acid q-ethyl ethanoate c. p-ethanoic acid q-ethanol d. p-ethanol q- ethanoic acid 4.element-proton
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chemical reactions? Products are the finished product of a chemical equation‚ and reactants are what make up the products. ( atoms‚ matter‚ molecules‚ energy‚ rate‚ temperature) Name some compounds: H2O (Hydrogen and Oxygen elements - Water) CH4 (Carbon and Hydrogen elements - Methane) NaCl (Sodium Chloride- salt) Different types of compounds: Metal + Metal = Metallic Compound Metal + Non-Metal = Ionic compound Non-Metal + Non-Metal = Covalent compound Different types of reactions: Metal+ non-metal
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mass percent of copper in the mineral bornite‚ Cu4FeS4? a) 44.4% b) 58.0% c) 14.5% d) 72.4% 8. A 0.2420 sample of an unknown containing C‚ O‚ and H is burned completely. Analysis shows that 0.2265 grams of water are produced. How many grams of hydrogen were present in the 0.2420 grams of sample? a) 0.0253 grams b) 0.2265 grams c) 0.0127 grams d) 0.1522 grams 9. What is the mass of 0.220 moles of AgNO3? a) 169.9 g b) 0.415 g c) 0.220 g d) 37.4 g Short Answers Q1. Silver consists
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example in salad dressings and ice creams. Vegetable oils that are unsaturated contain double carbon carbon bonds. These can be detected by reacting with bromine or iodine. Vegetable oils that are unsaturated can be hardened by reacting them with hydrogen in the presence of a nickel catalyst at about 60 °C. The hydrogenated oils have higher melting points so they are solids at room temperature‚ making them useful as spreads and in cakes and pastries. Processed foods may contain additives to improve
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Name *Density @ STP Melting Point (°C) Boiling Point (°C) Chlorine Hydrogen Hydrogen chloride Hydrogen sulfide Nitrogen Nitrogen monoxide 3.21 g/L 0.0899 g/L 1.640 g/L 1.54 g/L 1.25 g/L 1.34 g/L 1.43 g/L 2.532 g/cm 3 2.165 g/cm 3 2.92 g/L 1.00 g/cm 3 −101 −35 −259 −115 −85 −253 −85 −61 −210 −164 −218 851 801 −73 −196 −152 −183 Decomposes 1413 −10 100 Oxygen Sodium carbonate Sodium chloride Sulfur dioxide *Water (at 4°C) 0 NCDPI Reference Tables for Chemistry
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module: NOTE: In chemistry‚ [x] means “concentration of x” in moles per litre (mol/L). EG: [H3O+] means “concentration of H3O+ ions” in mol/L. BASIC reactions to remember: Acid reactions: acid + base salt + water acid + metal salt + hydrogen gas acid + carbonate carbon dioxide gas + salt + water Formation of hydronium: H+ + H2O H3O+ Reactions of various oxides with water: Non-metal (acidic) oxides: CO2 (g) + H2O (l) H2CO3 (aq) (carbonic acid) SO2 (g) + H2O (l) H2SO3 (aq) (sulfurous
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Joseph Sulaiman Alya Abourezk 4/13/12-4/14/12 Class Action Lab Report Purpose: To determine‚ through observations‚ the identity of substances produced in a chemical reaction. Materials: Safety Goggles Stirring rod Magnesium ribbon Solid CuSO4•H2O Matches Test tubes Copper metal 3M HCl Red and blue litmus strips 0.1M AgNO3 Zinc metal 0.1M Pb(NO3)2 Test tube holder 0.1M KI Bunsen burner 0.1M Na2NO3 Crucible tongs 1.0M NaOH Water (H2O) 0.1M Ca(NO3)2 50mL beaker
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limestone - H2O‚ water - NH3‚ ammonia is recycled Useful products - sodium carbonate. Na2CO3 – reason for process Waste products - CaCl2‚ calcium chloride - Heat Chemical properties of the main product (Na2CO3) - Forms several hydrates which are used in many ways - It is moderately alkaline‚ so it can neutralise strong acids - Can precipitate many metal ions from solution as carbonates Uses of sodium carbonate - Glass manufacturing (most common use) o Used as a flux gas which
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Q. 1. What do you observe when ammonia gas is bubbled through red litmus solution? Q. 2. Write an equation for solutions of ammonium chloride and sodium hydroxide are heated. Q. 3.(i) What is the purpose of Haber’s Process ? (ii) Name the gaseous inputs of the Haber’s Process and state the ratio by volume in which the gases are mixed. (iii) What is done to increase the rate of reaction in the Haber Process ? (iv) Give two different ways by which the product can be separated from the reactants
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