differing readings. The combination that provided the highest voltage was Zn-C(Zinc and Carbon)‚ with an average of 1.02 volts. The second highest combination was Cu-Zn(Copper and Zinc)‚ which produced a mean of .86 volts. The third highest reading was C-Mg(Carbon and Magnesium)‚ with a voltage of .67. The fourth highest combination belonged to Cu-Mg(Copper and Magnesium)‚ with .52 volts. The fifth highest combination of electrodes was Zn-Mg(Zinc and Magnesium)‚ which created .37 volts. The sixth
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adding the nitric acid. Place the beaker in fume hood for approximately twenty minutes. If the copper has not completely reacted with the nitric acid; heat the beaker to speed up the reaction. This reaction is represented by the equation: Cu (s) + 4 HNO3 (aq)  Cu(NO3)2+2NO2 (g) +2H2O (l) this reaction resulting in a blue liquid and brown gas that has the odor of chlorine. 2. For step two have a four hundred milliliter beaker filled with three hundred milliliters of ice water. Place the beaker
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voltmeter. A. Reactant cells [1.0] M Experimental Cell Potential values Theoretical Cell Potential values Pb| Pb(NO3)2 (aq) || Cu | Cu(NO3)2 (aq) 0.47 V 0.485 V Cu | CuSO4 (aq) || Fe | Fe (NH4)2(SO4)2 (aq) 0.79 V 0.683 V Cu | CuSO4 (aq) || Zn | ZnSO4 (aq) 1.1 V 1.109 V B. Concentration Cell Cu | CuSO4 (aq) || [1.0] con Cu | CuSO4 (aq) [1x10-6] di 0.2 V 0.709 V Part A/B- Voltaic Cells- See appendix A for Voltaic NIE and Concentration Cell potential Part C-
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and diluted to the calibration line and swirled vigorously. We then measured the absorbance of wavelength of each vial. We then weighed out 2.0255 g of the unknown (#75) ore sample and made the same solution as above in the electrolytic analysis of Cu in an Ore and followed the same heating procedures making a solution. We then measured and recorded the absorbance of the solution at the wavelength of maximum absorbance‚ λ
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All metal ions in solution are ’associated’ with water. The water molecules can also be weakly bonded or more strongly as a ligand to form a complex ion‚ and these can also present in solid ’hydrated’ salts of crystallization. E.g Copper(II) nitrate (Cu(NO3) 2.3H2O). A complex ion has a metal ion at its centre with a number of other molecules or ions surrounding it. These can be considered to be attached to the central ion by co-ordinate (dative covalent) bonds. The molecules or ions surrounding
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Film Clip Analysis An Ideal Husband - 1947 This scene depicts what appears to be lovers preparing for bed and discussing the political unrest within the mans life‚ set in an extravagant house the couple appear to have returned from a party as they are wearing tuxedo and ball gown. The upper class setting is then further exemplified when the woman calls the maid to post a letter for her (shot 24). This kind of setting represents clearly the wealth that the couple bear‚ further exemplifying the
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Cazul Ford Pinto Acesta caz s-a petrecut la sfarsitul anilor ’60‚ cand cererea pentru masini sub-compacte a fost in crestere pe piata. Specificatiile Iacocca pentru proiectarea masinii au fost fara compromisuri: "Pinto trebuia sa fie cu nici macar o uncie mai greu de 2.000 de pounds (aprox. 900 kg) si sa nu coste un cent peste 2.000 de dolari." In timpul proiectarii si productiei‚ totusi‚ testele de coliziune a relevat un defect serios la rezervorul de benzina. In accidente
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of removal of heavy metal ions Cu (II)‚ Zn (II)‚ Co (II)‚ Ni (II)‚ Pb (II) and Cd (II) in the presence of complexing agents with the aminopolycarboxylic acid groups namely EDTA‚ NTA‚
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experiments‚ I found the metals with the most activity to the least activity. The following metals are ranked from most or lots of activity to least or no activity: 1) Magnesium (Mg) 2) Zinc (Zn) 3) Iron (Fe) 4) Copper (Cu) Magnesium (Mg)‚ Zinc (Zn)‚ Iron (Fe)‚ and Copper (Cu). 2) Reactions for Zinc: Zn + HCl = ZnCl2 + H2 (unbalanced) Zn + 2 HCl = ZnCl2 + H2 (balanced) zinc + hydrochloric acid = zinc chloride + hydrogen (name of
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Equations: 1) Cu + 4H+(aq) + 2NO3-(aq) Cu2+ + 2NO2 + 2H2O 2) Cu2+(aq) + 2-OH(aq) Cu(OH)2 3) Cu(OH)2 + heat CuO + H2O 4) CuO + H2SO4 Cu2+(aq) + SO42-(aq) + H2O 5) Cu2+(aq) + Zn Cu + Zn2+(aq) Stage 1- Dissolution of Copper Mass of vial & copper = 3.537g Mass of vial = 2.505g Mass of Copper = 1.032g Moles of copper = mass (g) ÷ (63.5g/mol) = 0.0162 mol (3s.f) Copper description: Initially‚ the copper was a solid that was
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