The absorption spectrum is measured using a spectrophotometer and the data is graphed in Excel. The peak of the line is used to find Vmax of Fe2+. Vmax is used to find the moles of Fe2+ and ligand. The unknown n is a ratio of moles ligand divided by moles Fe2+. Results and Discussion For the first part of the experiment (Part A), five different 100 mL volumetric flasks were each filled with 1,2,3,4 and 5 mL of iron (II) solution.
In Part 3, six specific metals were reacted, in individual test tubes, with hydrochloric acid and a variety of different metal ion solutions, in order to find if a reaction of metal displacement happened. The observations noted formed a trend of increasing reactivity among the six metals. Experimental In Part 1 of the experiment, the Web Elements website was used to make 5 scatter plot graphs that showed the melting points at certain atomic numbers, from the information provided by the periodicity of melting points section of the website. In the graphs, the melting point (in degrees Kelvin, K) was plotted along the y-axis, and the atomic number along the x-axis; all graphs were Melting Point vs. Atomic Number graphs. Graph 1 contained Group 1 elements: Li, Na, K, Rb, Cs, and Fr.
0.00079 moles EDTA4- c. 0.00079 moles ZnI2 d. 0.0517 grams of ZnI2 are in the sample e. 0.0517/0.237= 21.8% f. Error Is 6.34% Lab Report: Part 1: In this lab we used the following supplies: * Zinc Iodide * Na2H2EDTA(s) * Calmagite indicator solution * pH 10 buffer solution * 6M Acetic Acid * Unknown Zinc Compound The main purpose for this part of the lab was to determine the amount of zinc ion in a sample of ZnI2 by titration. The two types of zinc: * Zinc iodide made by zinc and iodine * Commercially purchased zinc iodide (the
Stoichiometry is a section of chemistry that involves using the relationships between reactants or products in a chemical reaction to determine the desired quantitive data. 4. Using the balanced chemical reaction between Sodium carbonate and Calcium Carbonate given in page 92 of your lab manual (first paragraph of procedure), find the mass of Sodium Carbonate (in grams) needed in reaction? Na2CO3(aq)+CaCl22H20(aq)-CaCO3(s)+2NaCl(aq)+2H2O Date:_____3/30/2015____________ Name______Chloe Flake______________ 1. Title: 1pt Stoichiometry Of A Precipitation Reaction 2.
CHEM 3210 SEC 318 November 12, 2013 Nucleophile Substitution Reactions of Alkyl Halides Summary: Nucleophilic substitution can occur by an SN1 mechanism or an SN2 mechanism. In SN1 and SN2 reactions, the reaction rate is affected by: the nature of the halide, the nature of the solvent, the reaction temperature, the nature of the nucleophiles, and the concentration of reactants. In this experiment we will be examining reactions with NaI/acetone and AgNO3/Ethanol. We will determine the relative rates of reaction and determine whether these substances can undergo an SN2 reaction. Halides Structure BP 1-Chlorobutane 77-78°C 1-Bromobutane 100-104°C 2-Chlorobutane 68-70°C 2-Chloro-2-methylpropane 51-52°C Bromobenzene 156°C 1-Chloro-2-butene (trans) 68°C 1-Chloro-2-butene (cis) 63.5°C 1-Chloro-2-methylpropane 68-69°C 2-Bromobutane 91°C 2-Bromo-2-methylpropane 71-73°C Procedure: 1.
Format your paper according to APA standards. MGT 498 Week 2 DQs 1 ,2 ,3 Included MGT 498 Week 3 Individual Assignment Environmental Scan Paper Write a 1,050- to 1,400-word paper in which you complete the following: Research and describe the internal and external environments of 2 to 3 real-world companies using an environmental scan. Fill out the SWOT Analysis form provided by the instructor and attach it to your paper. Determine what competitive advantages each company has and what strategies each company is using. How does each company create value and sustain competitive advantage through business strategy?
Lab #09: Is the Substance Ionic or Covalent? Purpose: To identify compounds as ionic or covalent based on their properties. We will do this by testing melting point, conductivity, and solubility. Hypothesis: Draw a chart in which you will predict what your results will look like for the three different tests for an ionic compound and a covalent compound. We will fill this table in
Chem 112 Assignment for Chapter 19 1. Calculate ΔS° values for the following reactions by using tabulated S° values from Appendix B (Petrucci text) a) N2H4 (g) + H2 (g) → 2NH3 (g) b) 2Al (s) + 3 Cl2 (g) → 2 AlCl3 (s) c) Mg(OH)2 (s) + 2 HCl (g) → MgCl2 (s) + 2 H2O (l) d) 2 CH4 (g) → C2H6 (g) + H2 (g) 2. Use data in your Appendix B to find ΔH° and ΔS° values at 25°C to calculate ΔG° where ΔG° = ΔH° - T ΔS° for each of the following reactions. a) Ni (s) + Cl2 (g) → NiCl2 (s) b) CaCO3 (s, calcite) → CaO (s) + CO2 (g) c) P4O10 (s) + 6 H2O (l) → 4 H3PO4 (aq) d) 2 CH3OH (l) + 3 O2 (g) → 2 CO2 (g) + 4 H2O (l) Note: the following values ΔHf° (kJ/mol) S° (J/K) Ni (s) 0 29.9 NiCl2
Materials: * Spectrophotometer * 15 M NH3 * 0.40 M Cu2+ Solution * 8 M HNO3 Procedures: Figure out the optimal wavelength for the spectrophotometer. Measure the absorbance of copper solution in five test tubes using different volume amounts of copper in each test tube. Use known molarity of copper solution to calculate concentration of copper in each test tube. Using the values of
Matter and Chemical Reactions Pre-Lab Preparation: Purpose: The reason we are doing this lab is because we are trying to see what will happen. When you put copper and silver nitrate together. Also after that I will see if any elements reacted and if so which ones and what is the name of the compound they formed. Hypothesis: If I put the copper into the silver nitrate, then it will make some type of solid. Materials: copper wire AgNO3 solution Sandpaper Stirring Rod 50-mL Graduated Cylinder 50-mL Beaker Funnel Filter Paper 250-mL Erlenmeyer Flask Ring Stand Small Iron Ring Plastic Petri Dish Paper Clip Bunsen Burner Tongs Pre-Lab Questions: 1.)