Name: _ Date: _ Lab Instructor: _ Lab Section: _
EXPERIMENT 1 Synthesis of Potassium Ferric Oxalate Trihydrate Postlaboratory Questions: 1. Speculate as to why your percent yield was less than 100%.
2. What advantage is there to calculating the percent yi
Solutions to Problem Set 7 6.4 (a) The work done is given by : (4 cylinders).(60 cycles/min).(-1400 bar. 105 Pa/bar). (2.5 L. 0.001m3/L) = -8.4 x 107 J (b) The expanding gas in the cylinder does work on the pistons. Therefore, the work done by the gas is
Lab 8: Chemical Kinetics: Iodine Clock Reaction
Purpose: The purpose of this investigation was to determine the rate at which the following reaction occurs:
Procedure: The team designed and performed experiments in order to determine the complete c
Molecular Shape and Polarity Purpose: The purpose of this laboratory investigation was for the team to determine the shape and polarity of a number of molecules by comparing predictions based on the VSEPR model with results of quantum mechanical calc
CHAPTER 1 ATOMS: THE QUANTUM WORLD
microwaves < visible light < ultraviolet light < x-rays < -rays
(a) If wavelength is known, the frequency can be obtained from the relation c = : 2.997 92 108 m s -1 = ( ) (925 10-9 m)
2.997 92 1
Jordan Hauer 9/6/04 Engri 115 Prelab #1 The Traveling Salesman Problem 1.
2. 48 nodes 3. The difficulties I encountered in choosing the tour was trying to find the path that visits all nodes and ends up closest to the starting node as possible. 4. I
Solutions to Problem Set 4
(a) The chlorate ion is trigonal pyramidal. (b) All the oxygen atoms are equivalent (resonance forms) so there should be only one O-Cl-O bond angle with a value close to 109.5. 3.4
(a) The shape of XeF5+ ion is square pyrami
The temperature, the humidity, and the evaporation of water are physical properties. The ripening of oranges is a chemical change.
(b) intensive; (c) extensive;
CHAPTER 3 MOLECULAR SHAPE AND STRUCTURE
(a) The shape of the thionyl chloride molecule is trigonal pyramidal. (b) The O-S-Cl angles are identical. (c) The expected bond angle is slightly less than 109.5.
(a) bent, the electron pair on the
Ben Kemper Lab Instructor: Don Knobloch Lab: Friday PM 9/29/06 Molecular Shape and Polarity Part A Bond Lengths and Angles Bond Length 1.012 1.653 Bond Angle 109.47 35.26
All N-H Bonds H-H
All H-N-H Angles N-H-H
Optimizing the Structure N-H Bond
John Xu 5/4/07 Lab Report Experiment 9: Preparation of a High-Temperature Superconductor The BaO2, Y(OH)3 and CuO were mixed together. They were ground using a mortar and pestle until there were no streaks left and everything was a fine gray powder.
John Xu 4/20/07 Lab Report Experiment 9: Preparation of a High-Temperature Superconductor 1. Calculations Trial 1 Moles of I- = (0.16 M KI)(0.040 L) = 0.0064 moles Total Volume: 0.060 L Concentration of I - : 0.0064 moles / 0.060 L = 0.11 M Moles of
John Xu 4/6/07 Lab Report Experiment 6: Spectroscopic Determination of an Equilibrium Constant 1. [FeSCN2+] for testtube 1 Moles KSCN = Molarity * Volume= 2.0 x 10-4 M KSCN * 0.005 = 1.0 x 10-6 Moles of SCN- = moles of FeSCN2+ [SCN-] = 1.0 x 10-6 / 0
John Xu 3/29/07 Lab Report Experiment 5: Physical Properties of Pure Substances and Solutions Part A: Phase Behavior of Water, Carbon Dioxide, and t-Butanol 1. Running cold water over the flask with boiling water will cause the steam inside to conden
John Xu 3/8/07 Experiment 4: Enthalpy of Formation of an Ammonium Salt Part I: Determination of the Heat Capacity of the Calorimeter Mass of Cold Water: 48.0 grams Mass of Hot Water: 44.4 grams Initial Temperature of Cold Water: 22.7 C (y = -0.0007(7
John Xu 3/2/07 Experiment 3: Molecular Shape and Polarity 1. Data Collected in Part I NH3 N-H Bond Length: 1.012 H-N-H Bond Angle: 109.47 N-H-H Bond Angle: 35.26 N-H Bond Length (Lowest Energy): 1.003 H-N-H Bond Angle (Lowest Energy): 107.21 Dip
John Xu 2/23/07 Lab Report 2 Experiment 2: Optical Spectroscopy The proposed identity of the unknown is LiCl and KCl. This is due to the presence of bands at 612 nm, and 546 nm which was characteristic of the bands of LiCl and KCl. The band 671 was s
Molecular Shape and Polarity Part A Bond Lengths and Angles Bond Length 1.012 1.653 Bond Angle 109.47 35.26
All N-H Bonds H-H
All H-N-H Angles N-H-H
Optimizing the Structure N-H Bond Lengths: 1.003 H-N-H Bond Angle: 107.21
Molecular Polarity a
Lab 6: Chemical Equilibrium Purpose: The purpose of this investigation was for the author to observe equilibrium and calculate equilibrium concentrations and equilibrium constants by measuring the absorption spectrum of a test solution of different c
Properties of Liquids, Solids, and Solutions Purpose: The purpose of this laboratory investigation was for the author to study physical properties of different forms of matter. The author could observe freezing points, boiling points, freezing point