A) If your spectrophotometer can measure a maximum absorbance of 1.5, what is the maximum concentration...
A) If your spectrophotometer can measure a maximum absorbance of 1.5, what is the maximum concentration of Compound N (ε=6220 M-1cm-1) that you can measure without diluting?
B) If you add 3mL of water to 1mL of Compound, mix and get an absorbance of 0.2, what is the concentration of the original solution?
Homework Answers
Add Answer to:
A) If your spectrophotometer can measure a maximum absorbance of
1.5, what is the maximum concentration...
The Absorbance for the highest concentration of starch is lower than you might have expected. What...
The Absorbance for the highest concentration of starch is lower than you might have expected. What is the most likely reason for this? The sample was prepared incorrectly and actually has a lower starch concentration than indicated. Not enough Lugols was added, and not all of the starch is being detected. The measurement was made inaccurately, and the Absorbance is probably higher than indicated. Spectrophotometer readings are inaccurate near their maximum value of 2. You have series of starch solutions...
In order to analyze water samples using a spectrophotometer or plate reader, it is necessary to...
In order to analyze water samples using a spectrophotometer or plate reader, it is necessary to turn the molecules of nitrate into a dye molecule that can be quantified. The first step in turning nitrate (NO3-) into a dye molecule is reducing it to a molecule of nitrite (NO2-). This is done by reacting the NO3- with cadmium. After the reduction reaction, the NO2- is reacted with two additional reagents. The first reagent, Reagent A, is a solution of sulfanilamide and...
Please type in the Computer so I can be able to read it. A student need...
Please type in the Computer so I can be able to read it.
A student need to prepare four standard solutions by serially diluting a stock solution with concentration 5.0 times 10^-4 N. Standard I will be created by transferring 5.00 mL of the stock solution to the mark with deionized water. The remaining standard solutions (Standards 2 - 4) will be created by transferring 25.00 mL of the previously made standard solution to a 50.00 mL volumetric flask, then...
can you help with these 3 questions What is the molarity of a solution composed of...
can you help with these 3 questions
What is the molarity of a solution composed of 32.0g of CsHCO3 dissolved in 100.0 mL of water? 3 pts Question 18 U A solution of 5.00x10-4 M Tylenol is prepared by taking 1.00 mL of a stock solution and diluting it to a volume of 450.00 ml What is the concentration in molarity of the original stock solution? Question 19 6 pts In a titration, 3.54mL of NaOH is neutralized using 14.60...
Part II. Determination of Unknown SCN concentration. 0.387 9=3663.24-0.0427 1. Use the absorbance you measured for...
Part II. Determination of Unknown SCN concentration. 0.387 9=3663.24-0.0427 1. Use the absorbance you measured for part II and the equation you obtained from part I to calculate the concentration of FeSCN In the cuvette. Show your calculations with formulas and report the result. 2. Since KSCR was limiting reactant, you may consider amounts of FeSCN and SCN to be the same. KSCN was diluted from the original unknown concentration in the bottle (c1) when the required by the protocol...
Please type your answer so I can read it, and I just need help for question...
Please type your answer so I can read it, and I just
need help for question one ( Hypothesis ) don't worry about the
rest of them.
Experimental plan: You are provided with a standard solution of albumin, which is 60 g/L. This is known as the primary standard. Your task is, complete the table below to prepare 3 other standards with 15, 30 and 45 g/L concentration, respectively with the final volume of 1 mL. These are known as...
my questions are the following: A) what is the concentration of the stock solution of LDH?...
my questions are the following:
A) what is the concentration of the stock solution of LDH?
B) Based upon Part B of the protocol, show your calculations to
make the 250ug/ml LDH solution.
C) Based upon Part B of the protocol, show your calculations to
make the 25ug/ml LDH solution.
You will be given 60 ul of LDH stock solution. You need to determine the protein concentration of this stock solution and then perform a serial dilution to end up...
Can't figure out the concentration of the complex of solns. 10, 11, 12, 13, & 14. Modern...
Can't figure out the concentration of the complex of
solns. 10, 11, 12, 13, & 14.
Modern Experimental Chemistry Chemistry 153 The Iron(III) Thiocyanate Complex Purpose of the Experiment To determine the chemical formula of a complex ion and measure its formation equilibrium constant Equipment Spectro Vis spectrophotometer and LabQuest, cuvette, 25-mL buret (3), ring stand, buret clamp (2), 50-mL beaker (3), small plastic beakers Reagents SCN, as KSCN, 0.00200 M solution Fe; as Fe(NO), 0.00200 M solution and a...
You have a water sample from a creek that is thought to contain some amount of...
You have a water sample from a creek that is thought to contain some amount of dissolved copper ions. It has no apparent blue color. You set up standards of varying known concentrations of Cu2+, mix 0ml of each into 1.0 ml 10 g/L glucose + 1.0 ml of BCA solution, let them all sit long enough to reach equilibrium (some heat helps them get there faster), and you find these results: Cu2+(mg/L) Absorbance at 562nm 0.0 0.000 2.0 0.150 4.0...
Please show all your work for the problems! Exp Composition Total Vol pH 1 A few...
Please show all your work for the problems! Exp Composition Total Vol pH 1 A few mL of 0.10M NH3 (unchanged) n/a 11.13 2 2.5mL 0.1M NH3 & 7.5mL H2O 10 ml 10.82 3 2.5mL 0.1M NH4Cl & 7.5mL H2O 10 ml 6.01 4 2.5mL 0.1M NH3 & 2.5mL 0.1M NH4Cl & 5mL H2O 10 ml 9.26 5 Take 1mL Solution #4 and add 9mL of water 10 ml 9.26 Solution 1. Use the concentration of NH3 and the measured...
The Absorbance for the highest concentration of starch is lower than you might have expected. What is the most likely reason for this? The sample was prepared incorrectly and actually has a lower starch concentration than indicated. Not enough Lugols was added, and not all of the starch is being detected. The measurement was made inaccurately, and the Absorbance is probably higher than indicated. Spectrophotometer readings are inaccurate near their maximum value of 2. You have series of starch solutions...
Please type in the Computer so I can be able to read it.
A student need to prepare four standard solutions by serially diluting a stock solution with concentration 5.0 times 10^-4 N. Standard I will be created by transferring 5.00 mL of the stock solution to the mark with deionized water. The remaining standard solutions (Standards 2 - 4) will be created by transferring 25.00 mL of the previously made standard solution to a 50.00 mL volumetric flask, then...
can you help with these 3 questions
What is the molarity of a solution composed of 32.0g of CsHCO3 dissolved in 100.0 mL of water? 3 pts Question 18 U A solution of 5.00x10-4 M Tylenol is prepared by taking 1.00 mL of a stock solution and diluting it to a volume of 450.00 ml What is the concentration in molarity of the original stock solution? Question 19 6 pts In a titration, 3.54mL of NaOH is neutralized using 14.60...
Part II. Determination of Unknown SCN concentration. 0.387 9=3663.24-0.0427 1. Use the absorbance you measured for part II and the equation you obtained from part I to calculate the concentration of FeSCN In the cuvette. Show your calculations with formulas and report the result. 2. Since KSCR was limiting reactant, you may consider amounts of FeSCN and SCN to be the same. KSCN was diluted from the original unknown concentration in the bottle (c1) when the required by the protocol...
Please type your answer so I can read it, and I just
need help for question one ( Hypothesis ) don't worry about the
rest of them.
Experimental plan: You are provided with a standard solution of albumin, which is 60 g/L. This is known as the primary standard. Your task is, complete the table below to prepare 3 other standards with 15, 30 and 45 g/L concentration, respectively with the final volume of 1 mL. These are known as...
my questions are the following:
A) what is the concentration of the stock solution of LDH?
B) Based upon Part B of the protocol, show your calculations to
make the 250ug/ml LDH solution.
C) Based upon Part B of the protocol, show your calculations to
make the 25ug/ml LDH solution.
You will be given 60 ul of LDH stock solution. You need to determine the protein concentration of this stock solution and then perform a serial dilution to end up...
Can't figure out the concentration of the complex of
solns. 10, 11, 12, 13, & 14.
Modern Experimental Chemistry Chemistry 153 The Iron(III) Thiocyanate Complex Purpose of the Experiment To determine the chemical formula of a complex ion and measure its formation equilibrium constant Equipment Spectro Vis spectrophotometer and LabQuest, cuvette, 25-mL buret (3), ring stand, buret clamp (2), 50-mL beaker (3), small plastic beakers Reagents SCN, as KSCN, 0.00200 M solution Fe; as Fe(NO), 0.00200 M solution and a...
Most questions answered within 3 hours.
-
Project management question:
Name 3 different types of resources (hint: humans are one
type)
asked 9 minutes ago -
Consider the following reaction: C 2H 2( g) + 2H 2( g) C 2H 6(
g)...
asked 16 minutes ago -
Consider a 1.0 L buffer containing 0.092 mol L-1 HCOOH and 0.100
mol L-1 HCOO-. What...
asked 25 minutes ago -
Koch Realty has owned a vacant land with a FMV of
$775,000 and an adjusted basis...
asked 31 minutes ago -
It is estimated 29% of all adults in United States invest in
stocks and that 85%...
asked 31 minutes ago -
What does a 2-sided p value of 0.04 mean? (I am not asking if it
is...
asked 45 minutes ago -
A parallel-plate capacitor is made from two aluminum-foil
sheets, each 7.8 cmcm wide and 5.1 mmlong....
asked 46 minutes ago -
1. why is toluene a stronger nucleophile than benzene?
2.why is phenol a stronger nucleophile than...
asked 1 hour ago -
4. How can you solve for the density of the liquid from the
slope? Please show...
asked 1 hour ago -
when 2053 j of heat is added to 46.3 g of hexane C6H14 the
temperature increases...
asked 1 hour ago -
I need new and unique answers, please. (Use your own words,
don't copy and paste), Please...
asked 1 hour ago -
MCL 445.111 et seq. deals with Home Solicitation Sales.
MCL stands for Michigan Compiled Laws which...
asked 1 hour ago