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- A 3.03-g petroleum specimen was decomposed by wet ashing and subsequently diluted to 500 mL in a volumetric flask. Cobalt was determined by treating 25.00-mL aliquots of this diluted solution as follows: Assume that the Co(II)-ligand chelate obeys Beer’s law, and calculate the percentage of cobalt in the original sample.what is the thore tical vicld of vanadium that can be pro duced by the reaction of 40.09 of V 205 with 40.0s of calcium based on the followin) chemilal reaction V 205 CS) +5 CAl C) y 2VO) t5 CaO cs) a-) 1.2g bJ 22ug c)s bg d.) 40.03 e) 20:35Data Report Sheet: Quantitative Analysis of Group I Cations Observations on Standard Solution: Part B: Part C: Part D: Unknown Unknown # 89 Redraw the flow chart for this experiment and record you observations for each step. Ions Present in Unknown:
- 1. A sample of feldspar weighing 1.500g is decomposed, and eventually there is obtained a mixture of KCI and NaCi weighing 0.1801 g. These chlorides are dissolved in H20, a 50-mL pipetful of 0.08333 N AGNO3 is added, and the precipitate is filtered off. The filtrate requires 16.47 mL of 0.100ON KCNS, with ferric alum as indicator. Calculate the percentage of K20 in the silicate.A 50.00 mL sample of water was collected from afaucet. A 10.00 mL aliquot of this sample was placedin a 25 mL volumetric flask, and diluted to mark. Thiswas then transferred to an Erlenmeyer flask, and wasmixed with Eriochrome Black T, and buffered to pH10. If titration of that sample required 21.27 mL of0.001645 M EDTA, what is the water hardness,expressed in ppm CaCO3 (100.09 g/mol)?OneLogin B Problem Set Metals and Coordin X DownloadAttachment ps://bconline.broward.edu/d2l/le/content/460959/viewContent/12468049/View BROWARD COLLEGE | CHM1046 GEN CHEM II ENHANCED.. 83 se Home Content Grades Communication v Tools v Resources v Contents Metals and Coordination Compounds » Problem Set Metals and Coordination Compounds blem Set Metals and Coordination Compounds and its 3) In the coordination compound [Pt(NH:):Cla], the oxidation number of Pt is coordination number is
- Mn, Fe, and Co in the +2 and +3 oxidation states all form hexaaquacomplexes in acidic aqueous solution. The reduction reactions of the three species are represented schematically below, where the water ligands are not shown for simplicity. It is an experimental fact from elec- trochemistry that Mn2+ and Co²+ are more easily reduced than Fe3+; that is, they will more readily accept an elec- tron. Based on the electron configurations of the ions involved, explain why Fe³+ is harder to reduce than Mn2+ and Co²+. Mn3+ + e – Mn²+ Fe* + e –→ Fe²+ Co³+ + e → Co²+9. The least soluble in the group. A. NiS; B. MnS; C. PtS; D. Fes; Ksp = 8 x 10-37 Ksp = 7 x 10-16 Ksp = 8 x 10-73 Ksp = 4 x 10-19 %3D %3D %3D %3DConstruct the octahedral crystal-field splitting diagram for the metal in each species. V(H,0);* Fe(CN);- Mn(H,O); * ODO OO口 Answer Bank 11
- The coloriesS supe atanliquid was so 11. How does the addition of H3O* affect the following reaction equilibrium? 2CrO42- (aq, yellow) + 2H3O* (aq) -> Cr2O7²- (aq, orange) + 3H2O (1) a. The reaction shifts to the right and the concentration of CrO42- increases. b. The reaction shifts to the right causing the concentration of Cr2072 to decreases and the solution to turns yellow. c. The reaction shifts to the right resulting in a reduction in the concentration of H3O* and an increase in the concentration of Cr2O,2. d. The reaction shifts to the left and the concentration of CrO42 increases. e. The reaction shifts to the left and the concentration of CrO42 decreases.A student has succeeded in identifying 2 types of complex compounds, the first compound (Odd Student ID) has percentage of Pt 52.6%; N 7.6%; H 1.63%; and 38.2% Cl with a central atomic charge of +4, while the second compound has composition of Co 22.0%; N 31.4%; H 6.78%; and 39.8% Cl with a central atomic charge of +3. a) Determine the empirical formula of both complex compounds! b) Draw the chemical structure and give name of both complex compounds!3. Determine the oxidationnumber for the indicated elementin each of the followingsubstances: (a) S in SO2 , (b) Cin COCl2 , (c) Mn in MnO4- ,(d)N in N2H4 , (e) N in HNO2 ,(f) Cr in Cr2O72-