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Please answer pre lab question 4. Thank you!
3. Dilute the 0.1 g/L quinine standard solution...
3. (20) You are required to prepare standards for a calibration curve. All the glassware and...
3. (20) You are required to prepare standards for a calibration curve. All the glassware and pipettes your method requires have a tolerance (RSD) of 0.1%. You start with a working solution of 0.1 M analyte. Remove 10 mL of that solution with a pipette, add it to a 100 mL volumetric flask and dilute it to the mark. Remove 10 mL of the newly prepared (diluted) standard, add to a 50 mL volumetric flask, and dilute it to the...
0.276 g KH2PO4 (record the mass you use to the nearest 0.1 mg) and transfer quantitatively...
0.276 g KH2PO4 (record the mass you use to the nearest 0.1 mg) and transfer quantitatively into a 250 mL volumetric flask. Bring to volume. Use a volumetric pipet to transfer 1.0 mL of this solution into a 100 mL volumetric flask and bring to volume. Calculate the molarity of this more dilute stock solution.
II. Digestion of Acetylsalicylic acid(standard and tablet) with NaOH . Digestion of Acetylsalicylic Acid Standard to Pr...
II. Digestion of Acetylsalicylic acid(standard and tablet) with NaOH . Digestion of Acetylsalicylic Acid Standard to Prepare Stock Solution: Obtain ca. 0.1 g dried acetylsalicylic acid (MM = 180.16 g/mol), accurately weighed, and quantitatively transfer to a 125-ml Erlenmeyer flask. Add 5 ml 1.0 M NaOH and heat mixture to boiling on a hot plate. This will hydrolyze the acetylsalicylic acid to sodium salicylate. If necessary, rinse down the walls of the Erlenmeyer with DI water to ensure complete hydrolysis...
#1, #3, and #5-7 please!!! Pre-Lab Questions 1. Write the balanced chemical equation for the formation...
#1, #3, and #5-7 please!!!
Pre-Lab Questions 1. Write the balanced chemical equation for the formation of FeSCN2" from Fe(NO3)3-9H:0 and NaSCN. 2. In this experiment a dilute solution of 0.1 M HNO is used to maintain the ionic strength and low pH needed for the reaction to occur. How is nitric acid classified in terms of MSDS? What are some of the safety concerns regarding the handling of nitric acid? 3. Look at the procedure for making the standard...
Can you answer question 4 & 5? The experiment and porcedure is posted below Question 4...
Can
you answer question 4 & 5? The experiment and porcedure is
posted below
Question 4 & 5
CHM3120C Analytical Chemistry Lab Lab 7. Spectrophotometric Determination of Iron in Mohr's Salt with o-Phenanthroline Required Reagents and Supplies: 50 mL of 0.0005M -0.0006 M of Mohr's solution (unknown), 10 g of Hydroxylamine hydrochloride (NH2OH, HCI), 500 mL of o-phenanthroline solution (contains 0.5 g of o-phenanthroline monohydrate), 83 g of sodium acetate (NaOAc. 3H20) in 500 mL of water (for 1.2 M...
The concentration of NaH2PO4 in a solution is 3.23 x 10-4 mol/L.
The concentration of NaH2PO4 in a solution is 3.23 x 10-4 mol/L. (a) Find the molarity (in mol/L) of Pin the solution. (b) What is the concentration of P in ppm or mg/L (molar mass of P = 30.97). (c) If 5.00 mL of the above solution was transferred into a 1.00-Liter volumetric flask and then dilute to the mark with DI water, what is the concentration of P in ppm after dilution?
A standard solution of iron was made by weighing 0.075 g of Fe(NH4)2(SO4)2 6(H2O) in 250...
A standard solution of iron was made by weighing 0.075 g of Fe(NH4)2(SO4)2 6(H2O) in 250 mL. Aliquots of this standard solution (see below) were transferred to a 100 mL volumetric flask, pH adjusted with citrate, and reacted with hydroquinone and o-phenanthroline and diluted to volume (100 mL). The absorbance was measured in a 1.0-cm cell using a Genesys 20 Spectrophotometer at 508 nm: Aliquot of standard solution Absorbance 1.0 mL 0.079 2.0 mL 0.163 5.0 mL 0.413 10.0 mL...
Search .l LTE 2:48 AM C 77% x Bio 212 - Lab 5 - Solutions Il...
Search .l LTE 2:48 AM C 77% x Bio 212 - Lab 5 - Solutions Il Repeat Proble... ... Lab 5: Additional Dilution Problems You have a stock solution that contains 24 mg/ml of protein, You want to make a set of standards with the following concentrations: 12 mg/ml, 6 mg/ml, 3 mg/ml and 1.5 mg/ml. You need a minimum of 500 ul of each standard after all dilutions are completed. Using the technique of serial dilution, explain how you...
need help on these Suppose you obtained the following data from two standard solutions of known...
need help on these
Suppose you obtained the following data from two standard solutions of known concentrations using a UV-Vis spectroscope: Analysis # Conc. (mg/L) 8.00 20.00 Absorbance (at 255 nm) 0.160 0.390 What is the concentration (in mg/L) of an unknown solution with an absorbance of 0.200 at 255 nm 10 points)? The unknown solution contains the same analyte as the standard solution does (Assume a path length of 1cm). 10. You prepared a stock solution by dissolving a...
Ferric Thiocyanate Standard Solution In Part A of this experiment you are instructed to prepare a...
Ferric Thiocyanate Standard Solution In Part A of this experiment you are instructed to prepare a solution as follows Pipette 10.00 mL of 0.150 M Fe3 solution, and 5.00 mL of 5.00x 10-4 M SCN solution in a 25.00 mL volumetric flask. Dilute to the mark with 0.100 M HNO3 and mix well. Calculate and enter the concentration of FeSCN2+ in this solution and, also, write it in your notebook. (It will be required for your Report sheet.) [FesCN2+1 6M...
3. (20) You are required to prepare standards for a calibration curve. All the glassware and pipettes your method requires have a tolerance (RSD) of 0.1%. You start with a working solution of 0.1 M analyte. Remove 10 mL of that solution with a pipette, add it to a 100 mL volumetric flask and dilute it to the mark. Remove 10 mL of the newly prepared (diluted) standard, add to a 50 mL volumetric flask, and dilute it to the...
#1, #3, and #5-7 please!!!
Pre-Lab Questions 1. Write the balanced chemical equation for the formation of FeSCN2" from Fe(NO3)3-9H:0 and NaSCN. 2. In this experiment a dilute solution of 0.1 M HNO is used to maintain the ionic strength and low pH needed for the reaction to occur. How is nitric acid classified in terms of MSDS? What are some of the safety concerns regarding the handling of nitric acid? 3. Look at the procedure for making the standard...
Can
you answer question 4 & 5? The experiment and porcedure is
posted below
Question 4 & 5
CHM3120C Analytical Chemistry Lab Lab 7. Spectrophotometric Determination of Iron in Mohr's Salt with o-Phenanthroline Required Reagents and Supplies: 50 mL of 0.0005M -0.0006 M of Mohr's solution (unknown), 10 g of Hydroxylamine hydrochloride (NH2OH, HCI), 500 mL of o-phenanthroline solution (contains 0.5 g of o-phenanthroline monohydrate), 83 g of sodium acetate (NaOAc. 3H20) in 500 mL of water (for 1.2 M...
Search .l LTE 2:48 AM C 77% x Bio 212 - Lab 5 - Solutions Il Repeat Proble... ... Lab 5: Additional Dilution Problems You have a stock solution that contains 24 mg/ml of protein, You want to make a set of standards with the following concentrations: 12 mg/ml, 6 mg/ml, 3 mg/ml and 1.5 mg/ml. You need a minimum of 500 ul of each standard after all dilutions are completed. Using the technique of serial dilution, explain how you...
need help on these
Suppose you obtained the following data from two standard solutions of known concentrations using a UV-Vis spectroscope: Analysis # Conc. (mg/L) 8.00 20.00 Absorbance (at 255 nm) 0.160 0.390 What is the concentration (in mg/L) of an unknown solution with an absorbance of 0.200 at 255 nm 10 points)? The unknown solution contains the same analyte as the standard solution does (Assume a path length of 1cm). 10. You prepared a stock solution by dissolving a...
Ferric Thiocyanate Standard Solution In Part A of this experiment you are instructed to prepare a solution as follows Pipette 10.00 mL of 0.150 M Fe3 solution, and 5.00 mL of 5.00x 10-4 M SCN solution in a 25.00 mL volumetric flask. Dilute to the mark with 0.100 M HNO3 and mix well. Calculate and enter the concentration of FeSCN2+ in this solution and, also, write it in your notebook. (It will be required for your Report sheet.) [FesCN2+1 6M...
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