agents strong enough to react with the iodide. The copper concentration of an unknown copper sample was determined using iodometric titration. The first part of the experiment involved the preparation of the working standard Cu(II) solution of specific concentration from CuSO4•5H2O. A standard sodium thiosulfate (Na2S2O3) solution was also prepared to serve as the titrant for the analysis. Proper handling should be administered for this solution since it decomposes into its component ions when it
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Chemical Equilibrium ------------------------------------------------- ------------------------------------------------- RESULTS AND DISCUSSION A. Iron-Silver Equilibrium In studying equilibrium between iron and silver‚ 0.10 M FeSO4 and 0.10 M AgNO3 were used. The balanced equation for the reaction is: FeSO4 (aq) + 2 AgNO3 (aq) ↔ Fe(NO3)2 (aq) + Ag2SO4 (s) It has a net equation of: Fe2+(aq) + Ag+(aq) ↔ Fe3+(aq) + Ag(s) This part of the experiment
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oxide “Oxides of metals are generally stable to heat and they are considered to be most stable form of compound found in nature.” Oxides of potassium‚sodium‚calcium‚magnesium‚ aluminum ‚ zinc‚iron‚lead and copper are stable to heat uO C PbO Zn O http://foricseandbeyond.blogspot.in/ MERCURIC OXIDE “Mercury(II)oxide” “orange red” 2HgO 2Hg + O2 1.The amorphous powder changes to dark red and appears almost black. 2.It gives off a colourless‚ odourless gas which relights a
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dividing mass of copper compound used by moles of compound in unknown sample. The percent copper averaged out to 31.6% while the molecular weight of the sample averaged out to 201.1mw. In conclusion‚ the unknown compound of pure copper salt was close to Cu(C2H3O2)2 •H2O which has a percent copper of 31.8% and a molecular weight of 199.654mw. Introduction: What is the unknown
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chloride (salt)‚ and iron. Copper sulfate is a chemical compound which is produced commercially by reacting various copper (II) compounds with sulfuric acid [1]. It generally appears as a bright blue or green crystal [1]. Its chemical formula is CuSo4. Iron is silver-white magnetic metallic and readily rusts in moist air [3]. Its chemical formula is Fe. The chemical reaction was demonstrated by the iron reacting to the copper sulfate.
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Experiment 1: Calorimetry C.L. Mercado institute of chemistry‚ college of science university of the philippines‚ diliman quezon city‚ philippines date performed: November 16‚ 2012 instructor’s name: Irina Diane V. CastaÑo _________________________________________________________________________________________________________________________ introduction Chemical reactions absorb or release heat. One way to measure this is by using a homemade calorimeter. The calorimeter used
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Density of Metals Problem: How does the mass and volume help determine the density of known metal samples? Hypothesis: When comparing the density of Zn(zinc) and Cu(copper)‚ you will find that Copper is more dense than Zinc. You can test this out by using the density formula D=m/v. Materials: * 2 metals (options: zn‚ al‚ or cu) * 3 samples of each metal (small‚ medium‚ and large) * Scale/Balance * Calculator * Water * Graduated Cylinder Safety: * Be prepared for your
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the useful froth scraped by loam board. (1) Selective flotation flow sheet. The process can recover useful minerals according to the difference of mineral floatability. For example‚ in the mixed flotation of Cu‚ Pb‚ Zn‚ S‚ we can select Pb and restrict Zn first‚ and then activate and select Zn. It is suitable for coarse grain and rich ore. (2) Collective flotation flow sheet. Which is also called mixed flotation process. It first emerges all useful ore together‚ and then separates them gradually
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(or Mass) | Concentration (or Molar Mass) | Cu(NO3)2 (aq) | Light blue solution | 10 ml | 0.10 M | NaOH (aq) | Clear solution | 20 ml | 2 M | HCl (aq) | Clear solution | 20 drops | 6 M | NH3 (aq) | Clear solution | 7 drops | 6 M | H2SO4 (aq) | Clear solution | 15 ml | 1.5 M | Zn dust | Silvery substance | 0.15 g | | ethanol | Clear solution | 5 ml | | Volume of Cu (NO3)2 (aq): 10 ml Concentration of Cu (NO3)2 (aq): 0.10 M Convert ml to l: 10 /
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Dilute NaOH Mg Silver None None None None Base Fizzes‚ gas‚ increased temperature None Cu Brown None None None None Base None None Zn Silver None None None None Base Fizzes None MgO White Slight odor None None Bubbles Base Dissolves‚ turns yellow‚ increased temperature None CuCO3 Green None Melts‚ turned black and Gas Dissolves None Base Fizzes Turns blue Cu(NO3)2 Blue None Dissolves and turns green None Dissolves‚ turns green‚ gas Acid Dissolves
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