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.
of mixture Metal C 25.605g 24.6mL 25.2°C 100.5°C 28.7°C Calculations: Show your work and write a short explanation with each calculation. Part I: 1. Calculate the energy change (q) of the surroundings (water). We can assume that the specific heat capacity of water is 4.18 J/ (g · °C), and the density of water is 1.00 g/mL. (4 points) q = m × c × Δt Given: q=?
Lab Title Geometrical Optics & Snell's Law | Lab # 11 | Name: | Joseph Apap | Class: | PHY101-14995 | Date: | 07/29/2015 | Purpose: | * Explain how to experimentally determine the index of refraction of two substances. * Develop a set of experimental procedures to find the index of refraction for water and vegetable oil. * Calculate the index of refraction using Snell's Law. * Explain Critical angle and total internal reflection | Procedures: | Required Materials: | * Laser pointer * Refraction cell * Ruler * Protractor * Vegetable Oil * Water * Paper * Pencil | | Apparatus | | | 1. Draw parallel lines on a piece of paper.
A voltmeter was used to measure the electrical resistance of different solutions. * Experiment and Observation: The plastic and glassware used in this experiment was thoroughly washed with hot water and rinsed with distilled water. * * Part I: Preparation of Standard Phosphate Solutions 1. 1.0 ppm standard: 1.00 mL of 10.0 ppm phosphate solution was placed in a 25 mL graduated cylinder and diluted to exactly the 10 mL mark with distilled water then poured into a plastic cup labeled 1. Cylinder was rinsed with distilled water.
Water the seeds daily until the grass is at least 1.5 inches tall. Take 20 seeds from a rapid growing weed plant and evenly plant 10 in each box. Water the grass regularly until weeds start to grow throughout the grass. Follow directions for each weed killer and apply is to the boxes of grass/weeds. Make sure to use the same amount of weed killer in each box.
The first test tube will be control, the second will be substrate and indicator dye, the third will be dilute extract, the fourth will be the same contents as the second, the fifth will be medium concentration of extract, the sixth will be the same contents as the second, and the seventh will be concentrated extract. 3) Add stock solutions to each tube using the corresponding graduated 5 ml pipette or dispensing device. 4) Adjust the spectrometer to zero absorbance at 500nm. Pour contents of test tube 1 into a cuvette. ) Make sure to keep time, read the spectrometer, and record the data.
Experiment 6 A & B: Thin Layer Chromatography Date: 10-9-12 Purpose: (A) Use thin layer chromatography to separate mixture of compounds of Fluorene, Fluorenol, & Fluorenone, then determine compounds found in unknown sample. (B) Determine development solvent by experimentation. Try 3 solvents for separating a pair of compounds that differ slightly in polarity. Procedure Outline:Part A1.Drew pencil line across plate 1 cm from bottom2. Marked 5 1 cm intervals on line starting 0.6 cm from edge of plate3.
We rotated the ray table until the refracted ray disappeared completely and only the reflected ray was visible. This is the angle of incidence. This gave us our angle of incidence theoretical value. From this we were also able to calculate the angle of refraction. Results
Eggshell Titration Lab Report LIU-1 Mr. Silva Beko Liu February 25, 2012 Purpose: Eggshells are composed in part of calcium carbonate. Calcium carbonate reacts with an acid to produce carbon dio xide, water, and a salt. The calcium carbonate in the sample eggshell will be determined by means of an acid/base back-titration. Procedure: 1.Wash an empty eggshell with distilled water and carefully peel all the membranes from its inside. Place all of the shell in premassed breaker and dry the shell in the drying oven at 110 degree Celsius.
Angle of Incidence 0° 10° 20° 30° 40° 50° 60° Predicted angle of refraction 0 6.56° 13.0° 19.2° 25.02° 30.27° 34.74° Variables and Controls: Independent Variable: The angle of the light coming from the ray box or the angle of incidence Dependent Variable: The angle of refraction on the plexiglass. Controls: The mediums where light travels (air and plexiglass). Materials: - ray box - plexiglass - white paper, protractor and pencil Procedure: 1. I folded the blank paper into four equal parts. Then drew two intersecting lines perpendicular to each other.