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.
* The final speed was recorded by the light gate detector about three times for each height. * To record the speed, we held the trolley at the top of the ramp with the help of meter rule. Then, as the trolley rolled down at the end of the ramp, the light gate detected its speed in metre per second(m/s). * The average speed of the final speed was calculated by : Vavg of the final speed (Vf) = V1+V2+V3 (m/s) 3 * The final speed was recorded by the light gate detector about three times for each
Lab # 4 : The Redox Arena II Procedural Summary There will be three different sized test tubes that will be used in this experiment, a boiling tube, a large and small test tube. The boiling tube will be labeled “R” for “reactants”. A scale with a weighing paper will be tared before adding 2 grams of granular zinc (Zn), record the mass, and then move the zinc to the boiling (R) tube. Weigh out 2 grams of iodine crystals, record it, and this will be added to the R tube, with the zinc. The R tube will then be put in a large beaker.
Carmen believed that the more salt, the lower the temperature is. It is incorrect. The lower amount of salt, the less time it took to freeze. 3. I would suggest to Carmen that she maybe would give herself more time to let the water freeze because when she added 5 grams of salt, it did not freeze in enough time of the experiment.
Record the readings of the three instruments at eight different speed settings of the tunnel: 15, 20, 25, 30, 35, 40, 45, & 50. 4. Plot two calibration curves with pressure transducer reading as the abscissa and micromanometer reading as the ordinate for the first, and micromanometer versus scannivalve as the second. Convert micromanometer data to read as total pressure in SI units [Pa]. 5.
Method Part 1 1 Clean the surface of the 0.5cm piece of magnesium with a piece of steel wool 2 Place the magnesium into a test tube 3 Add three drops of detergent to the test tube 4 Add 2 cm of hydrochloric acid to the test tube. Set timer for 5 minutes and record your observations, including the height of the foam produced in a results table 5 Repeat the process for the
And according to our data, our actual yield is 0.5g CaCO3. Thus, our percent yield is 73.5%. Our percent yield was close to 100%, but not very close. I believe the error lies in human error, as well as instrumentation sensitivity. Our scale only measures to grams accurately, and could have not accurately represented the .68g of CaCO3, or we could have lost the solid precipitate in the process of the experiment.
This cell was placed in a isotonicity enviroment. As for the cell of 1% sugar solution in 50% sugar solution it turned out that it weighed a lot less. At first I thought to myself that maybe I did not tie the dialysis tubing tight enough but then I
Uniform Acceleration Francesco Saccaggi Jordan Biovin Christopher Sigmon Physics 183-B 9/12/2011 Abstract This formal lab report defines what uniform acceleration is and how to calculate uniform acceleration of a ball rolling down a ramp and an object falling down. The two experiments will be performed by rolling a pool ball down a steel ramp and calculating where the ball will be at each second that passes by. The second experiment is finding the objects position when it falls down at a given time. The photogate can be used to calculate the position of the object as it falls down. Once the results are found you can calculate the percent error of the uncertainty values.
2) The larger moveable knife edge was then clamped to the pendulum, at a small distance (1cm) above the centre of mass. 3) The distance h was then determined from the centre of mass to the axis of suspension. 4) The mask was then attached to the pendulum. 5) The light gate was then connected to the digit-metre and adjust its height and position relative to the mask to allow the period T, of the pendulum to be measured repeatedly. 6) The procedure was then repeated for larger values of h, until T has passed its minimum value.