instructor to dilute the 6M NaOH to 0.1M in 300mls instead of 500mls in Part B of Experiment 21. One objective for performing these two experiments was to observe qualitatively the reactions between common acids‚ bases‚ and the indicators phenolphthalein‚ methyl orange‚ bromothymol blue‚ and red cabbage extract. Another focus of this experiment was to perform a
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Thermodynamics- Enthalpy of Reaction and Hess’s Law Objectives: 1. To calculate the heat of reaction of a given reaction using the concepts derived from Hess’s Law. Pre-lab Questions: 1. Define Heat of Reaction. The enthalpy change associated with the completion of a chemical reaction. 2. Define Specific Heat. The energy it takes to raise the temperature of 1 gram of a substance by one degree Celsius. 3. Calculate the heat of reaction assuming no heat is lost to the calorimeter. Use correct
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Lab #5: Refraction of Light Theory: Refraction can be defined as the bending of a wave when it enters a medium which causes it to have some reduced speed. In terms of light‚ refraction occurs when the ray passes through some medium which slows its speed; such as water or glass. In this instance the ray tends to bend towards the normal of the medium. The amount of bending or refraction which occurs can be calculated using Snell’s Law (). Objective: To measure the index of refraction of Lucite
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Richmonde Zegbe CHM111 Anita Mohan 03-11-2013 Experiment: Chemical reactions‚ and Equations Materials: 3 mL of copper(II) sulfate solution. 5 mL of 6 M HCl piece of zinc wooden splint test tube Bunsen burner 3 mL of zinc chloride solution. pentahydrate distill water
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Acid 2.83 2.94 13 Petr Sodium 0.5M NaC6H5O7 Weak Base 9.23 9.21 14 Sodium Sulfate 0.25M Na2SO4 Weak Base 7.24 7.23 15 Potassium Sulfate 0.25M K2SO4 Weak Base 7.37 7.58 Dilution of 1M of acetic acid to 0.1M and 0.5M 0.5M of HCl dilution: Vi(0.5M)(0.025L)1Mx1000=12.5mLof HCl used + 12.5mL of water. 0.1M of HC2H3O2 dilution: Vi(0.1M)(0.025mL)1Mx1000=2.5mL HC2H3O2 used + 22.5mL of water. HC2H3O2 was provided in a concentration of 1M. Solution Observations: All the solutions where clear liquids
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Lab report for Experiment #2: Extraction Your Name: Name of TA: Lab Partner’s Name: Lab Section: Title: Experiment #2: Extraction Purpose: What is the purpose of this lab? In your OWN words! Observations: Weighed out 3.2568 grams of chemical mixture that was yellow in color. Dissolved dry chemicals in 38 ml CH2Cl2 with gentle heating. Poured the yellow solution into sep funnel. Added 10 ml CH2Cl2 to flask to rinse‚ poured solution into sep funnel. Added 15 ml 3 M
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4 qrxn =-(100g)(4.18)(29.48-23.4)+(-12.53x 6.08)= -2620J/.1mol(1/1000kJ)= -26.2 kJ/mol Verify Hess’s Law 1. HCl (aq) + NaOH (aq) → NaCl (aq) + H2O (l) H+ + Cl- + Na+ + OH- → Na+ +Cl- + H2O (l) H+ + OH- → H2O (l) NH4Cl (aq) + NaOH (aq) → NH3 (aq) + NaCl (aq) + H2O (l) NH4+ + Cl- + Na+ + OH- → NH3+ + Na+ +Cl- + H2O (l) NH4++ OH- → NH3+ + H2O (l) NH3 (aq) + HCl (aq) → NH4Cl (aq) NH3+ + H+ + Cl- →NH4+ + Cl- NH3+ + H+ → NH4+ H+ + OH- → H2O (l) ∆H= -54.0 kJ/mol NH4++
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Project 17: Soaps and Detergents Stephanie Futrell Kelsey Duncan Tom Bunch Antwyone Clayborne Chemistry 1020 Laboratory‚ Section 007 Instructor: Fan Yang September 23‚ 2014 Our signatures indicate that this document represents our own work. Excluding shared data‚ the information‚ thoughts and ideas are my own‚ except as indicated in the references. Goals There was another oil spill that covered local birds in oil. The environmental group stepped in to help make their own soap
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LAB REPORT FOR EXPERIMENT 3 COPPER CYCLE OLANREWAJU OYINDAMOLA TUESDAY 27TH February 2013 Abstract This experiment is based on copper‚ to synthesize some copper compound using Copper (II) nitrate solution to obtain copper metal at the end. Changes of copper complexes when various are added and filtering out the precipitate by using Buchner funnel for vacuum filtration .The experiment started with preparation of copper (II) hydroxide and addition of copper oxide then addition of droplets
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College Chemistry 1 Lab 16 Oxidation Reduction Lab 16 Introduction: I will learn about redox reactions. Materials and Methods: I placed ten drops of each substance into different wells. Then I took Magnesium and put it in the first one. I put Zinc into the second one. I placed lead into the third and fourth one‚ and put iron into the fifth one. Results: See Table Below. Discussion: I learned about different redox reactions. Questions: A. Sodium
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