(Document Created by: RED) Example Unknown ● (1) I believe this solution to be Copper(II)Hydroxide because of the following reasons: ○ It has a pH value of 12 and burning it produces a bluegreen color. ○ It produced bubbles when mixed with Zn‚ Al and Fe which are all more reactive than copper. ● (2) I believe this solution to be Sodium Sulfate because of the following reasons: ○ Blah blah blah ○ Blah blah ○ blah blahhh Unknown 1 ● NaCl ○ ○ ○ ○ ○ Unknown 2
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Metals Physical Properties of Metals versus Non-metals Properties | Electrical conductivity | Heat conductivity | Melting and Boiling points | Malleability & ductility | Lustre | Metals | Good | Good | High | High | Shiny | Non-metals | Poor | Poor | Low | Low (Brittle) | Dull | Chemical Properties of Metals versus Non-Metals Properties | Metals | Non- metals | Reaction with oxygen | Form basic or amphoteric oxides | Form acidic or neutral oxides | Ionisation | Lose electrons
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will be BaSO4. Hypothesis In this experiment the reaction equation will be: CuSO4?H2O + Ba(NO3)2 →Ba SO4+ Cu(NO3)2 In Lab#6 that we have done in Dec 15 2003; we have found out that the mole for hydrate in copper (II) sulfate is 5. Thus‚ by this experiment I will continue to use the answer that I have found in Lab#6. So by using the knowledge from Lab#6 the reaction equation will be: CuSO45H2O + Ba(NO3)2 →BaSO4+ Cu(NO3)2 We can measure the mass of copper (Ⅱ) sulfate and the mass of the barium
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Sources of Sulphur: Sulphur is found in many places in the world in different forms. It usually exists in volcanic regions in USA‚ Mexico and Sicily. Sulphur could also be obtained from some metal ores like Copper pyrites (CuFeS2) and Blende (ZnS). Properties of Sulphur: In room temperature‚ sulphur is a yellow‚ brittle solid which doesn’t conduct electricity as it is a non-metal. Sulphur is insoluble in water. It is able to react with both metals and non-metals. Sulphur Dioxide:
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91 Chapter 5 Sources of plant nutrients and soil amendments A large number of diverse materials can serve as sources of plant nutrients. These can be natural‚ synthetic‚ recycled wastes or a range of biological products including microbial inoculants. Except for microbial inoculants (biofertilizers)‚ all of these contain one‚ two or several plant nutrients in readily or potentially available forms. A certain supply of mineral and organic nutrient sources is present in soils‚ but
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figures c) the ratio‚ by mass‚ of Ge to S to 3 significant figures d) the number of g S in 1 mol of the compound to 3 significant figures e) the number of C atoms in 33.10 g of the compound 5) Determine the mass % O in the mineral malachite‚ Cu 2 (OH) 2CO3 . 6) Determine the mass % H2O in the hydrate Cr(NO3 )3 ⋅ 9H 2O . Express your answer to 4 significant figures. 7) Determine the empirical formula of the rodenticide warfarin (a carbon-hydrogen-oxygen compound)‚ which consists
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of each type and the total charge must be equal on each side of the equation. Equations 1) Cu + 4H+(aq) + 2NO3-(aq) Cu2+(aq) + 2NO2 + 2H2O 2) Cu2+(aq) + 2-OH(aq) Cu(OH)2 3) Cu(OH)2 + heat CuO + H2O (Balanced) 4) CuO + H2SO4 Cu2+(aq) + SO42-(aq) + H2O (Balanced) 5) Cu2+(aq) + Zn + Cu + Zn2+(aq) (Balanced) Stage 1 Dissolution of Copper Mass of vial
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INVESTIGATION 12.A Target Skills Determining the reactivity of various metals Testing Relative Oxidizing and Reducing Strengths of Metal Atoms and Ions By observing whether reactions occur between solid metals and metal ions in solution‚ you can determine the order of oxidizing and reducing agents according to strength. Question How can the presence or absence of a reaction provide information about the relative strength of oxidizing and reducing agents? Safety Precautions
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EXPERIMENT 4 TITLE Complex Formation and Precipitation. INTRODUCTION Precipitation is the formation of a solid in a solution as the result of either a chemical reaction‚ or supersaturating a solution with a salt resulting in solid material collecting on the bottom of the beaker (Housecroft & Constable‚ 2006). When the solution has been supersaturated by a compound and no more material can be supported by the solution‚ it considered as precipitate. Commonly‚ the solid will fall out of the
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Test Dilute HCl Dilute NaOH Mg Silver N/A N/A Non soluble Bubbles Basic Hot/fizz N/A Cu Copper N/A Purple then turned black Non soluble N/A N/A N/A N/A Zn Silver N/A N/A Non Soluble N/A N/A Vaporized and fizzed N/A MgO White N/A Omits gas Hazy mix Boiled Rapidly Basic Got hot and fizzed Became thick or pasty CuCO3 Green N/A Turned black Hazy Green Became powdery Basic Dissolved and vaporized Turned blue and dissolved Cu(NO3)2 Blue N/A Turned green‚ became liquid Dissolved Boiled rapidly Acidic Turned
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