Investigating Chemical Equilibrium Date: 30th April 2013 Due Date: 15th May 2013 Prepared For: M. Seraji Prepared by: Andrea Odunze Abstract Many reactions proceed to a state of equilibrium. A chemical reaction at equilibrium‚ where the rates of the forward reaction and reverse reaction are equal‚ looks like this: A + B AB There are three factors‚ according to Le Chatelier’s principle‚ that affect the equilibrium position and equilibrium constant. These are the concentrations of products
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Last Name ____________________First Name _______________________ Ignore: 5‚ 7‚ 19‚ 30 1. | How many grams of CaCl2 (molar mass = 111.0 g/mol) are needed to prepare 4.44 L of 0.500 M CaCl2 solution? | | A) 369 g B) 271 g C) 258 g D) 296 g E) 246 g | 2. | An aqueous solution of ammonium sulfate is allowed to react with an aqueous solution of lead(II) nitrate.The complete ionic equation contains which of the following species (when balanced in standard form)? | | A)
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0.88g H2O × 0.68% = 0.005984g H2O 0.88g ±0.005984g H2O CuSO4: 63.55 + 32.07 + 16.00(4) = 159.62g1 mol (n)(Hydrated CuSO4): 2.12g CuSO4 ×1 mol CuSO4(s)159.62g CuSO4(s) = 0.01328 mol Hydrated CuSO4 H2O: 16.00 + 1.01(2) = 18.02g1 mol (n)( H2O): 0.88g H2O ×1 mol CuSO4(s)18.02g CuSO4(s) = 0.04883 mol H2O 0.01328 mol CuSO4 0.01328 mol = 1 CuSO4 0.04883 mol CuSO4 0.01328 mol = 4 H2O Presenting Processed
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carbon dioxide Element | Symbol | Valency | Hydrogen | H | 1 | Oxygen | O | -2 | Carbon | C | 4 | Calcium | Ca | 2 | Iron | Fe | 2 | Aluminium | Al | 3 | Sodium | Na | 1 | Potassium | K | 1 | Magnesium | Mg | 2 | Zinc | Zn | 2 | Copper | Cu | 2 | Silver | Ag | 1 | Lead | Pb | 2 | Chloride | Cl | -1 | Sulphate | SO4 | -2 | Hydroxide | OH | -1 | Carbonate | CO3 | -2 | Nitrate | NO3 | -2 | Phosphate | PO4 | -3 | Hydrogen Carbonate | HCO3 | -1 | Acids and Bases
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Question # 1: You are titrating 50 ml. of nitrous acid with sodium hydroxide (0.15 M). Equivalence is reached at 22.0 ml of NaOH delivered. Calculate the pH of the solution in the flask: a- before the beginning of the titration - after the delivery of 5 ml. of titrant b- at half-equivalence c-at equivalence d-after delivery of 23 ml. of titrant Part A) Reaction is: HNO2 + OH- NO2- + H2O Ka for Nitrous acid = 7.2E-4 Kw = Ka*Lb Kb = 1.0E-14/7.2E-4 Kb = 1.38E-11 Moles of base:
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Journal of Thermal Analysis and Calorimetry‚ Vol. 94 (2008) 1‚ 75–81 FUNGICIDAL AND BACTERICIDAL ACTIVITY OF METAL DIETHYLDITHIOCARBAMATE FUNGICIDES Synthesis and characterization H. S. Rathore1‚ K. Ishratullah2‚ C. Varshney1‚ G. Varshney1 and S. C. Mojumdar3‚4* 1 2 Department of Applied Chemistry‚ Z. H. College of Engineering and Technology‚ Aligarh Muslim University‚ Aligarh 202002 India Indian Institute of Chemical Technology‚ Uppal Road‚ Hyderabad 500007‚ India 3 Department of Chemical
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Role of mycorrhizas in the mineral nutrition of host plants Mycorrhizas are very important in the uptake of nutrients such as P‚ N‚ K‚ Cu‚ Zn and Ca by plants especially in soils low in these nutrients. Since P is the most limiting nutrient in tropical soils‚ mycorrhizas are vital for improving P nutrition particularly for cultivated plants. External hyphae can absorb and translocate P to the host from soil outside the root depletion zone. The thin mycorrhizal hyphae (2-4 μm in diameter) are able
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2 H 1s1 Hydrogen Group 2 Atomic Number Key 30 65.39 2 Atomic Mass 4.002602 0 He Group 13 Group 14 Group 15 Group 16 Group 17 1s2 Helium 3 2 (6.941) 1 4 9.012182 2 Li [He]2s1 Lithium Be [He]2s2 Beryllium Zn [Ar]3d104s2 Zinc Oxidation States Symbol Electron Configuration 5 10.811 3 6 12.0107 ±4‚2 7 14.0067 ±3‚5‚4‚2 8 15.9994 -2 9 18.9984032 -1 10 20.1797 B [He]2s22p1 Boron C [He]2s22p2 Carbon N [He]2s22p3
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up to discover the kind of connection between the concentration and absorbance of CuSO4 and have the capacity to utilize this information to measure grouping of unknown concentration in view of a given absorbance rate. To get a straight line calibration curve‚ absorbance versus focuses to be plotted. The
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room temperature and then again in a container of boiling water. Physical Data: No physical Data was applicable to the experiment. Chemical Equations: Part i: Changes in Reactant or Product Concentrations A.Copper and Nickel Ions • [Cu(H2O)4]2+ (aq) + 4NH3(aq) ←→ [Cu(NH3)4]2+(aq) + 4H2O(l) blue dark blue • [Ni(H2O)6]2+(aq) + 6NH3(aq) ←→ [Ni(NH3)6]2+(aq) + 6H2O(l) green pale violet • H+(aq) + NH3(aq)
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