QUESTIONS 1. What happens to your solution concentration if you store your solut
ID: 1030784 • Letter: Q
Question
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 calibration 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 127 Chem 24A Cu Spect Revised Sp 17Explanation / Answer
1. What happens to your solution concentration if your store them in a wet container?
Concetration is defined as the no of moles of solute/Volume of solution (in L). The solution concentration would be diluted if it is stored in a wet containter. The water on the walls of the wet container adds to the volume of the solution. So if the volume of the solution increases, the concentration decreases and the solution exists diluted than it should be.