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.
Read the absorbance at 20 second intervals from the start of the mixing. Then record your measurements on the table. After two minutes remove the tube from the spectrometer and visually note the color change. 6) Now mix the contents of tubes 4 and 5, transfer to a cuvette, and repeat your measurements for two minutes at 20 second
The test facility was made to run for 3 min before the test to attain steady condition. The duration of each record is 2 seconds, which gives a number of samples per second. All the nozzles are convergent with a circular inlet having diameter of 13 mm which varies smoothly along the length of the nozzle to a different geometrical exit cross-section except circle-circle
Suggest two reasons for this change. Task 2 Press back but not clear and change the number of chips to 10 but leave the acid concentration at 1.0 mol/dm3 . Click start and take readings approximately every 3 seconds (by clicking the take readings button) until the mass reaches 0.0 g. Stop the reaction immediately. Plot these results on the same grid as the results of your first experiment. How does the rate of reaction in Task 2 compare with the rate in Task 1?
I then measured my breathing rate by counting how many breaths I took in within thirty seconds, when thirty seconds had passed I stopped measuring my breathing rate and wrote it down, after this I then multiplied it by two in order to get how many breaths I took per minute. 3. After this I then took my temperature using a thermometer and recorded the result on a piece of paper. 4. I then carried out an exercise where I walked up six flights of stairs and then returned back to the classroom.
At first we dried the crucible in the flame three times and let it come to a constant mass by measuring the weight each time. To determine percentage of water in Epsom salt, we measured about 2g of the salt into three different, dried crucibles. The crucibles were first heated gently, then intensely to drive off all the water. The final data was reported as percent hydrate with 95% confidence level. RESULTS & DISCUSSION Weights of the crucible.
* 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