Introduction: • Rapid mixing is achieved by adding a coagulant chemical to a stream and adding turbulence. The turbulence can be achieved by mechanical agitators or baffled basins. When mixing is not efficient the chemical could be wasted or lower rates of particle aggregation. • The purpose of the lab is to analyses the water using mass balance analysis, so the concentration of the coagulant downstream can be determined. • The theoretical numbers were vastly different from measured results, this may be due to calculation errors. The concentration both upstream and downstream were also very similar. Equipment: • (1) Water Flume with Inlet and Outlet Tubing • (1) Peristaltic Pump with Associated Tubbing • (1) 5 Gallon Bucket • (1) Spectrophotometer • (12) Cuvettes • (1) Container of Cherry Kool-Aid • (2) …show more content…
15ml of the stock Kool-Aid solution from the graduated cylinder must be moved to a labeled cuvette using a pipette. 4. To produce the 0.5 C solution the graduated cylinder must have 15ml of water aided to replace the solution that was taken out. (The water used is just plain tap water.) 5. 15ml of the 0.5C solution must be taken out in a similar fashion to step 3, however the cuvette must be labeled 0.5 C. 6. Continue to use step 2-5 to produce concentrations of 0.25, 0.125, 0.0625, and 0.03125. Since each concentration is half of the previous one as long as half of the solution (once taken out and place in a labeled cuvette) is replaced with water, then the concentration will be halved. 7. The TA should assist with setting the UV spectrophotometer to a wavelength of 550nm and placing a blank in the machine to calibrate it. 8. Record the absorbance of each concentration on Table 1. 9. Using a computer create a standard curve. In this Lab, the curve was made by the TA. • Step 2: Flow Rate Measurements 1. Turn on tap water connected to the influent into the flume and allow water to flow for around 15 minutes. Adjust the slow so that the flume doesn’t
9. Get your stopwatch ready and drop the Alka-Seltzer tablet at the same time you started the timer. 10. When it finishes dissolving (you can see through the water and there is no more fizzing.) stop the timer and record the results. 11.
Then titrate with the sodium thiosulfate solution as in the standardization procedure, adding 6 drops of starch indicator near the end of the titration. Record the volume of thiosulfate solution used in the titration. Make a duplicate
2. A test tube was then filled with 35ml of yeast and placed in the
We finally took 1ml of the 0.01% solution from test tube using the glucose pipette and adding it to test tube 4, we then used the H2O pipette and added 9ml of H2O to test tube 4 creating 10ml of 0.001% solution.
Each subsequent trial will use one gram more. 2.Put baking soda into reaction vessel. 3.Measure 40 mL vinegar. 4.Completely fill 1000 mL graduated cylinder with water.
3.) Divide your 30g of white substance into the 4 test tubes evenly. You should put 7.5g into each test tube along with the water.
Put the amount of 0.1M cobalt (II) chloride hexahydrate that fills the end of a spatula into a test tube. Then add 2mL of 95% ethanol. Tap the end of the test tube to mix the solution and record the pertinent data in section 1 of the Data Table. Discard the solution in the appropriate container as directed to you by your lab instructor.
10cm3 of 1 molar solution. I will use 3 of each solution to ensure that
We were then to make a base solution of 0.7 M NaOH. In order to standardize
b. Drop Calculations Vol/Number of Drops. 1mL/23Drops =.034mL /drop VII. Conclusion Unlike other labs, this lab allows for the most precise titration. results possible.
Plan 1. Collect 4 different sized beakers 2. Boil some water in the kettle 3. Pour 50ml into each beaker 4. After 1 minute check temperature 5.
2. In the large beaker, put water and boil it completely. After that, remove the beaker from heat. 3. Sample tubes (A-D) should be labeled and capped tightly.
of Copper Sulphate. To do this I plan to work out the amount of water
second test tube also add 6 mL of 0.1M HCl. Make a solution of 0.165
Part A of the experiment, we were measuring the density of water. In this part, we measured by difference by measuring the mass of the empty graduated cylinder which was 46.35 grams and then added 25.0 milliliters of water to it. When subtracting by difference, our mass of the water was 25.85 grams. This was close to the measurements of the water added to the graduated cylinder. The density of the water was 1.0 grams/milliliters.