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Question 8 Status: Tries remaining: 21 Points possible: 1.00 Suppose you measure the absorbance of a...
Question 6 Status: Tries remaining: 3 | Points possible: 1.00 Suppose in an experiment to determine...
Question 6 Status: Tries remaining: 3 | Points possible: 1.00 Suppose in an experiment to determine the amount of sodium hypochlorite in bleach, 0.0000460 mol KIO3 were titrated with an unknown solution of Na S,0a and the endpoint was reached after 17.80 mL. How many moles of Na,S203 did this require? Answer: CHECK Question 8 Status: Tries remaining: 3 | Points possible: 1.00 A 25.00 mL solution containing 0.035 M sodium acetate is titrated witha 0.098 M solution of HCl....
Calculate the expected absorbance of solution of a 5.50x10-6 M solution of Blue # measured at...
Calculate the expected absorbance of solution of a 5.50x10-6 M solution of Blue # measured at 629 nm in a 1.50cm cell. The molar absorptivity for Blue #1 is 1.30×105 M-1cm-1 at 629 nm 4. A 2.50x10-5 M solution of a specific dye has an absorbance value of 1.300 when measured at 525 nm in a cell with a path length of 2.00 cm. Calculate the molar absorptivity of this dye at this wavelength 5.
Question 5 Status: Tries remaining: 3 Points possible: 1.00 Calculate the molarity of a solution prepared...
Question 5 Status: Tries remaining: 3 Points possible: 1.00 Calculate the molarity of a solution prepared by dissolving 0.187 g of KHP in enough water to make 125 mL of solution. The formula of KHP is KC H504 Answer: CHECK Question 6 Status: Tries remaining: 3 1 Points possible: 1.00 A beaker containing 0.400 g KHP was titrated with NaOH solution. The pale pink end point was reached after 18.55 mL of NaOH solution was dispensed. What is the molarity...
Question 5 Status: Tries remaining: 3 | Points possible: 1.00 Calculate the molarity of a solution...
Question 5 Status: Tries remaining: 3 | Points possible: 1.00 Calculate the molarity of a solution prepared by dissolving 0.185 g of KHP in enough water to make 125 mL of solution. The formula of KHP is KC3H304. Answer:
Question 1 Status: Tries remaining: 2 | Points possible: 1.00 The reaction is a type of Choose.. that Saponifica...
Question 1 Status: Tries remaining: 2 | Points possible: 1.00 The reaction is a type of Choose.. that Saponification is the process of making soap from fats or oils Choose... which is the soap uses the addition of a to release the Choose... CHECK Question 1 Status: Tries remaining: 21 Points possible: 1.00 . The reaction is a type of Choose... condensation that fats or oils Saponification is the process of making soap from ,which ist esterification hydrolysis to release...
Question 6 Status: Tries remaining: 3 Points possible: 1.00 A beaker containing 0.400 g KHP was...
Question 6 Status: Tries remaining: 3 Points possible: 1.00 A beaker containing 0.400 g KHP was titrated with NaOH solution. The pale pink end point was reached after 19.55 mL of NaOH solution was dispensed. What is the molarity of the NaOH solution? Answer:
answer please Question 1 12.5 points Save Answer The complex that is formed between galium (1)...
answer please
Question 1 12.5 points Save Answer The complex that is formed between galium (1) and B-hydroxyquinoline has an absorption maximum of 568nm. A 0.0082M solution of the complex has a transmittance of 42.9% when measured in a 1.00-cm cell at this wavelength. Calculate the molar absorptivity of the compex. Question 2 of 8 Question 2 12.5 points Save Answ Chromium(III) forms a complex with diphenylcarbazide whose molar absorptivity is 4.17X104 at 540 nm. Calculate the path length in...
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...
Please help I am completely confused, I included the 2 graphs needed for this post lab....
Please help I am completely confused, I included the 2
graphs needed for this post lab. Thank you!
Postlab Assignments . (a) Using your own standard curve, the line equation you generated and Beer's law equation Equation 1) calculate the molar absorpivity (e) of blue dye. For all your measurem cuvette used is 1.00 cm. Use this as the value of b in Equation 1 ents, the size of (b) Using Beer's law equation again, what does a high value...
Status: Tries remaining: 2 Points possible: 1.00 If the density of aluminum is 2.70 g/mL and...
Status: Tries remaining: 2 Points possible: 1.00 If the density of aluminum is 2.70 g/mL and there are 453.9 grams in a pound, what is the volume (in ml) of an aluminum bar that weighs 13.0 lbs? Answer: CHECK
Question 6 Status: Tries remaining: 3 | Points possible: 1.00 Suppose in an experiment to determine the amount of sodium hypochlorite in bleach, 0.0000460 mol KIO3 were titrated with an unknown solution of Na S,0a and the endpoint was reached after 17.80 mL. How many moles of Na,S203 did this require? Answer: CHECK Question 8 Status: Tries remaining: 3 | Points possible: 1.00 A 25.00 mL solution containing 0.035 M sodium acetate is titrated witha 0.098 M solution of HCl....
Calculate the expected absorbance of solution of a 5.50x10-6 M solution of Blue # measured at 629 nm in a 1.50cm cell. The molar absorptivity for Blue #1 is 1.30×105 M-1cm-1 at 629 nm 4. A 2.50x10-5 M solution of a specific dye has an absorbance value of 1.300 when measured at 525 nm in a cell with a path length of 2.00 cm. Calculate the molar absorptivity of this dye at this wavelength 5.
Question 5 Status: Tries remaining: 3 Points possible: 1.00 Calculate the molarity of a solution prepared by dissolving 0.187 g of KHP in enough water to make 125 mL of solution. The formula of KHP is KC H504 Answer: CHECK Question 6 Status: Tries remaining: 3 1 Points possible: 1.00 A beaker containing 0.400 g KHP was titrated with NaOH solution. The pale pink end point was reached after 18.55 mL of NaOH solution was dispensed. What is the molarity...
Question 5 Status: Tries remaining: 3 | Points possible: 1.00 Calculate the molarity of a solution prepared by dissolving 0.185 g of KHP in enough water to make 125 mL of solution. The formula of KHP is KC3H304. Answer:
Question 1 Status: Tries remaining: 2 | Points possible: 1.00 The reaction is a type of Choose.. that Saponification is the process of making soap from fats or oils Choose... which is the soap uses the addition of a to release the Choose... CHECK Question 1 Status: Tries remaining: 21 Points possible: 1.00 . The reaction is a type of Choose... condensation that fats or oils Saponification is the process of making soap from ,which ist esterification hydrolysis to release...
Question 6 Status: Tries remaining: 3 Points possible: 1.00 A beaker containing 0.400 g KHP was titrated with NaOH solution. The pale pink end point was reached after 19.55 mL of NaOH solution was dispensed. What is the molarity of the NaOH solution? Answer:
answer please
Question 1 12.5 points Save Answer The complex that is formed between galium (1) and B-hydroxyquinoline has an absorption maximum of 568nm. A 0.0082M solution of the complex has a transmittance of 42.9% when measured in a 1.00-cm cell at this wavelength. Calculate the molar absorptivity of the compex. Question 2 of 8 Question 2 12.5 points Save Answ Chromium(III) forms a complex with diphenylcarbazide whose molar absorptivity is 4.17X104 at 540 nm. Calculate the path length in...
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...
Please help I am completely confused, I included the 2
graphs needed for this post lab. Thank you!
Postlab Assignments . (a) Using your own standard curve, the line equation you generated and Beer's law equation Equation 1) calculate the molar absorpivity (e) of blue dye. For all your measurem cuvette used is 1.00 cm. Use this as the value of b in Equation 1 ents, the size of (b) Using Beer's law equation again, what does a high value...
Status: Tries remaining: 2 Points possible: 1.00 If the density of aluminum is 2.70 g/mL and there are 453.9 grams in a pound, what is the volume (in ml) of an aluminum bar that weighs 13.0 lbs? Answer: CHECK
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