1
answer
0
watching
239
views
11 Nov 2019
Need help answering the questions
QUESTIONS 1. What happens to your solution concentration if you store your solutions in a wet container? 2. Why do you not need to dry the volumetric flask between uses? 3. Explain why the same cuvette should be used for all parts and why the cuvette should be lined up in the same orientation in the sample compartment for each determination of the experiment. 4. Use the calibration curve (graph) which you prepared of absorbance vs known concentration to answer the following questions. These calculations will be used again in Chem 24B. a. Use the calbration graph to determine the concentration of the solution which gives an absorbance of 0.5 A. b. Use the concentration of the solution giving A = 0.5 and b 1.0 cm to calculate the molar absorptivity (a) for Cu(NHs)2. Use Beer's Law for this calculation. c. Use the molar absorptivity calculated in 4b and Beer's Law to calculate the concentration of a solution with A 0.25 A.
Need help answering the questions
QUESTIONS 1. What happens to your solution concentration if you store your solutions in a wet container? 2. Why do you not need to dry the volumetric flask between uses? 3. Explain why the same cuvette should be used for all parts and why the cuvette should be lined up in the same orientation in the sample compartment for each determination of the experiment. 4. Use the calibration curve (graph) which you prepared of absorbance vs known concentration to answer the following questions. These calculations will be used again in Chem 24B. a. Use the calbration graph to determine the concentration of the solution which gives an absorbance of 0.5 A. b. Use the concentration of the solution giving A = 0.5 and b 1.0 cm to calculate the molar absorptivity (a) for Cu(NHs)2. Use Beer's Law for this calculation. c. Use the molar absorptivity calculated in 4b and Beer's Law to calculate the concentration of a solution with A 0.25 A.
Beverley SmithLv2
24 Jan 2019