.... (b) water from aqueous magnesium sulfate .................. (c) glycine from a mixture of the amino acids‚ glycine and lysine ................... (d) iron filings from a mixture of iron filings and water .................. (e) zinc sulfate crystals from aqueous zinc sulfate .................. (f) hexane from a mixture of the liquids‚ hexane and octane .................. [1] [1] [1] [1] [1] [1] [Total: 6] 2 Selenium and sulfur are in Group VI. They have similar properties. (a) One of the main uses
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the Cu-Zn voltaic cell used in the experiment. Zinc has higher reactivity and it is more likely to loss electrons. Thus‚ electrons flow from Zn electrode to Cu electrode. Copper stripe is the positive electrode. Zinc stripe is the negative electrode. Reaction happened on each terminal: Positive terminal: Zn-2e-→Zn2+ Negative terminal: 2H+2e-→H2 It is assumed that bubbles (hydrogen gas) will come out from copper electrode. It is assumed that zinc and copper stripes are pure. Classification of
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e– Ag(s) Overall equation: Fe(s) + 2Ag+(aq) Fe2+(aq) + 2Ag(s) b Oxidation: Mg(s) Mg2+(aq) + 2e– Reduction: Cu2+(aq) + 2e– Cu(s) Overall equation: Mg(s) + Cu2+(aq) Mg2+(aq) + Cu(s) c No reaction. Iron cannot displace the more reactive zinc from solution. d Overall equation: Cu(s) + 2Ag+(aq) Cu2+(aq) + 2Ag(s) Review Exercise 9.2 1 a –2 b 0 c +4 d +6 e +6 f –2 2 a NH3‚ ammonium salts b N2 c N2O d NO e HNO2‚ N2O3‚ nitrites f HNO3‚ nitrates 4 a Cr2O72–(aq) + 8H+(aq) +
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Title “ The Effect of Various Metal Activity (Zinc (Zn)‚ Magnesium (Mg)‚ and Copper (Cu)) in the Color of Rainwater and Amount of Rust in the Iron Nail “ Hypothesis If the type of metal that has the highest activity will be used ‚ then there will be the least amount of rust found in the nail and the color of the rainwater would be the lightest. Independent Variable • Types of metals used in wrapping Title: “ The Effect of Various Metal Activity (Zinc (Zn)‚ Magnesium (Mg)‚ and Copper (Cu)) in the
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60% yield. A + B C + D C + E F What is the yield of F? answers 1 | 1.71 x 10-2 nm3 | 2 | 0.860 g carbon dioxide | 3 | 9.99 g iron III chloride | 4 | x = 1 | 5 | 70% lead II oxide | 6 | 7.42 g Zn and 27.64 g zinc iodide | 7 | 79 % yield | 8 | 48% yield
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transportation equipment; roofing; chemical and pharmaceutical machinery; and alloys (brass‚ bronze and beryllium alloyed with copper are particularly vibration resistant); alloy castings; electroplated protective coatings and undercoats for nickel‚ chromium‚ zinc‚ etc. More recently copper is being used in medical equipment due to its anti-microbial properties. The United States has mines in Arizona‚ Utah‚ New Mexico‚ Nevada and Montana. Leading producers are Chile‚ Peru‚ China‚ United States and Australia
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other oxidation. A typical galvanic cell is based on the spontaneous redox reaction: Net Ionic Equation Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) Half Equations Zn(s) → Zn2+(aq) + 2e– Cu2+(aq) + 2e– → Cu(s) The anode will undergo reduction (Zinc) and the cathode will undergo oxidation (Copper) The two half cells must be physically separated so that the solutions do not mix together. A salt bridge is used to separate the two solutions yet keep the respective charges in the solution from separating
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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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of mineral processing methods. Gravity separation is also used for sorting iron ore and manganese ore‚ is also used to deal with some non-metallic ore‚ such as asbestos‚ diamond‚ kaolin. Flotation processing non-ferrous metals such as copper‚ lead‚ zinc ore‚ gravity separation method of pre-sorting to remove coarse gangue or wall rock to reach the initial enrichment. Gravity concentrator new technology is the formation of the joint operations of the fine sieve and magnetic agglomeration process
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Oxidation and Reduction Mnemonic: OILRIG Oxidation Is Loss‚ Reduction Is Gain Oxidation → the loss of electrons from an atom or an ion→ always happens at anode (positive electrode) → think anOde (O2 in the electrolysis of water xp) Redox reactions: Reactions involving the transfer of electrons e.g. burning‚ rusting‚ photosynthesis‚ respiration and the browning of apples. happens in three types of reactions: 1. addition of oxygen 2. removal of hydrogen 3. increase in valency (how easily an atom
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