Analytical Chemistry Homework Help

The unknown chlorate is one of the following choices: sodium chlorate NaCIO, potassium chlorate KCIO, magnesium chlorate Mg(CIO)₂. or calcium chlorate Ca(CIO) Calculate the percent composition of oxygen in each compound for comparison. Report percentages with proper precision Conclusion: Of the four possible unknown compounds,___________________ has a percentage composition closest to your experimental percentage of oxygen. Error Analysis: Calculate the percent error of your result using the calculated percentage of oxygen (from above) as the expected value. Be sure to show the equation and your work.

13. Matching: A multiple dilutions series is diluted as follows: Tube 1 = 1:1 Tube 2 = 1:4 Tube 3 = 1:3 Tube 4 = 1:5 Tube 5 = 1:2 Calculate the final dilution in tubes 2-5 and match them to the correct answer.

Part B: Calibration of a Pipette 5.Report the density of water for each trial used above in Table B. 6.Calculate the true mass of water using the buoyancy correction using the data from Trial 1 above. 7.Calculate the true volume of water delivered with the 25.00 mL pipette using the data from Trial1 8 Calculate and report the true mass and true volume for Trial. Determine the average volume delivered by the pipette in Trials 1 and 2 above. Does this average volume fall within the manufacturer’s tolerance for the pipette?

Part B: Calibration of a Pipette 5.Report the density of water for each trial used above in Table B. 6.Calculate the true mass of water using the buoyancy correction using the data from Trial 1 above. 7.Calculate the true volume of water delivered with the 25.00 mL pipette using the data from Trial1 8 Calculate and report the true mass and true volume for Trial. Determine the average volume delivered by the pipette in Trials 1 and 2 above. Does this average volume fall within the manufacturer’s tolerance for the pipette?

Part C: Checking Burette Tolerance 9- Enter your data into Table C below. Note that there are additional columns compared to the table you have in your original data. For each range of volumes, calculate the true mass of water, true volume, (true volume-apparent volume), and indicate if the volume delivered falls within the given tolerance of ± 0.05 mL. 10- Report the density of water for the burette tolerance. 11- Choose one volume range and show calculations for the true mass and true volume of water delivered. Use the buoyancy correction where appropriate.

A compound with the molecular formula C4H6O2 gave the following 13CNMR spectrum. a) Propose a structure. (Hint: Find IHD first). b) Assign the peaks to the carbon atoms in the structure

9. A 20 N solution is diluted 1:50. What is the resulting concentration?

6. A serial dilution series is made using 1:2 dilutions. 5 mL of stock solution from tube 1 is added to 5 mL of diluent in tube 2 and so on. What is the final dilution in tube 4?

8. A stock glucose standard has a concentration of 100 mg/dL. A 1:50 dilution of the standard is done. What is the concentration of the resulting dilution?

In the first part of this experiment, UV-Vis spectra will be recorded for several, simple aromatic molecules in toluene solution. Beer-Lambert plots will be constructed for each aromatic spices and the molar extinction coefficient determined. In the second part of the experiment, unknown samples will be investigated. Given the information derived in part one, UV-Vis spectroscopy will be used qualitatively to identify the species, and then quantitatively to determine the amount of each component present in the unknown sample.