Add another 20 mL water to the 100 mL beaker and stir for one minute. (40 mL total water in beaker) 21. Make observations. 22. Fill out Dissolve Column and Floats Column on Data Sheet.
In the first part, five 100 mL flasks of 5 mL ligand solution, 5 mL 2 M sodium acetate, 4 mL 3 M NH2OH, and 1-5 mL Fe2+ solution are diluted with water. The absorption spectrum for varying concentrations of Fe2+ are measured using a spectrophotometer and the data is graphed in Excel. The slope of the line is ε in the Beer-Lambart equation A = εcl. In the second part of the experiment, eleven flasks containing diluted stock solutions of Fe2+ and ligand are mixed with 5 mL 2 M sodium acetate and 4 mL 3 M NH2OH and diluted with water. The absorption spectrum is measured using a spectrophotometer and the data is graphed in Excel.
17. Press START and turn on the stir bar. 18. After 10 seconds have elapsed, add hot water sample 19. Press STOP when the thermograph stabilizes 20.
Record Initial Mass of equipment 9. Transfer mLs of 3 M HCl with micro pipette from 30 mL beaker into Erlenmeyer flask containing carbonate sample and stir with micro stir rod. 10. Repeat transfer of mLs of 12M HCl until reaction is thoroughly complete and there are no bubbles. 11.
Record all the mass measurements for Penny Set B. 3.) Using a 100-mL graduated cylinder and the water displacement technique, measure the volume of 1 penny from Penny Set A (Pre-1982). Then, find the volume of 2, 3, 5, 7, 9, and 13 pennies. Record all volume measurements for Penny Set A.
Eng 2116 Engineer Egg Drop Paper Description: Using only a single piece of cardboard, scissors and masking tape, construct an egg carton that will allow an egg to fall 20 feet without breaking. Idea: 1) Cut the poster board in to 2 halves. 2) Use one half to construct a cone. The cone should be large enough that the egg will fit into the open end of the cone but will go no farther than half way down the cone. (See figure 1.1.)
Repeat step two, then continue adding 5 dry pennies each step to balance until you have used all 30 pennies 4. Fill Graduated cylinder with 20mL of distilled water 5. Drop 5 pennies (one at a time), into the graduated cylinder and record new volume 6. Repeat adding 5 pennies each time and record 7. Record Data in Notebook 8.
Drop just enough pieces to rise the water level 0.5 mL. Record the starting and ending volumes. Now, re-mass the container and aluminum and record its value. Keep adding pieces of aluminum to the graduated cylinder, increasing the water level each time by 0.5 mL and recording it, and also re-mass the container and aluminum and recording that as well. Whenever you record the volume, record to the nearest 0.01mL.
Jessica Yan Rick St. Denis, Tyler Wiseman 13 September 2012 Projectile Motion: Ball in the Bin Purpose: The purpose of the experiment is to determine the velocity of a ball launched from the Projectile Launcher device, and then to use that velocity to find where on the floor the ball will land given a specific angle. Theory: Two-dimensional motion is as it sounds, made of the two components of Vertical velocity and Horizontal Velocity. Horizontal Motion can be described as constant, neglecting air resistance, and Vertical Motion is characterized by the acceleration of gravity pulling at 9.8m/s². In this particular experiment, the total velocity will be split into the two components in order to find the time in the air, and horizontal distance from the launcher. The motion of these components can be described as d=vt for constant horizontal motion, and d=1/2at² + Vit.
10. In the top three wells on the left (A-1, A-2, A-3) Add 8 drops of Na2S203. 11. Take an empty pipette and label it Na2S203. 12.