Homework Answers
Method used to determine the concentration of an unknown sample by comparing with set of known samples is known as a Calibration Curve. The response of instrument is studied by changing the concentration of the sample being analyzed(analyte). The curve between the concentration and response of instrument is linear which can be further analyzed to determine the concentration of the analyte.
The advantages of calibration curve are listed below:
a. Methods that use statistics of least squares are not 100% reliable, calibration curves can be used to study any kind of uncertainty pertaining to this problem.
b. Theoritical models are more like ideal cases, which can used to study the reponses till a certain extent. Calibration curve can be used to study the real sample that widely depend on certain external factors like temperature and pressure.
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1. Explain the purpose of the calibration curve, and why it is necessary to have a calibration curve for each diffe...
Question 1: When creating the calibration curve during week 1, it was determined that [KSCN] = [...
Question 1: When creating the calibration curve during week 1, it was determined that [KSCN] = [FeSCN2+] at equilibrium. Explain why these two concentrations were equal in terms of the relative concentrations of each reactant, the limiting reactant, and the direction in which the reaction proceeded Question 2: Describe the process by which equilibrium concentrations of the reactants and product were determined. Include in your discussion, how the equilibrium (final) concentration of FeSCN2+ was determined using a calibration curve, mole-to-mole...
Question 1: When creating the calibration curve during week 1, it was determined that [KSCN] =...
Question 1: When creating the calibration curve during week 1, it was determined that [KSCN] = [FeSCN2+] at equilibrium. Explain why these two concentrations were equal in terms of the relative concentrations of each reactant, the limiting reactant, and the direction in which the reaction proceeded. Question 2: Describe the process by which equilibrium concentrations of the reactants and product were determined. Include in your discussion, how the equilibrium (final) concentration of FeSCN2+ was determined using a calibration curve, mole-to-mole...
1) At 298 K, an equilibrium mixture contains P H2=0.958 atm, P I2= 0.877 atm and...
1) At 298 K, an equilibrium
mixture contains P H2=0.958 atm, P I2= 0.877 atm and P HI=0.020
atm. Please try and answer all!
You must show all your work to receive credit. Watch sig figs! Consider the reaction: 1) At 298 K, an equilibrium mixture contains P H2-0.958 atm, P ½=0.877 atm, and P HI-0.020 atm. Calculate the value of the equilibrium constant Kp? a) (o, o2) 0.938x o.87? b) And what is the value of the equilibrium constant...
Beer’s Law Objective : We will explore an application of absorption spectroscopy using calibration curves and...
Beer’s Law Objective : We will explore an application of absorption spectroscopy using calibration curves and Beer’s Law. Use the “LAB : HOW TO…” link from the class website if you need help with how to use balance, Bunsen burner… and such. Introduction: You may write this information in your lab notebook for your own reference. It can’t be cut and pasted. Different solutions have different spectral properties. In this portion of the experiment those properties will be utilized to...
(A) True or False, and explain! (30%) 1. It is impossible to explain why workers have...
(A) True or False, and explain! (30%) 1. It is impossible to explain why workers have the same productivity have different wage in a frictionless labor market. 2. If a person decreases working hour when his or her wage increase, we know that there is no substitution effect. 3. If a labor market has only one buyer of labor, we called it a monopolist. 4. The reservation wage of an unemployed worker is usually zero. 5. A wage increase would...
Chemie Heterogeneous Reaction Chemical reactions may be envisioned in terms of reactants and products and written...
Chemie Heterogeneous Reaction Chemical reactions may be envisioned in terms of reactants and products and written in the general form A +bB - C +dD Reactants Products The equilibrium constant may be expressed in the form K - LORD up or K, - P2 where [C] represents the molar concentration of Catequilibrium. For a given reaction, the concentrations at equilibrium would have to be determined experimentally. In application, there are practical cases where some of the reactants and/or products do...
1. Is it possible for two different equipotential lines to cross each other? Explain why or...
1. Is it possible for two different equipotential lines to cross each other? Explain why or why not? 2. Is it possible for two different electric field lines to cross each other? Explain why or why 3. Where do the electric field lines begin and end? If they are equally spaced at their beginning, 4. If you wanted to push a charge along one of the electric field lines from one conductor to the 5. The potential is everywhere the...
1.While you do not have to state any of the definitions, you should have a conceptual...
1.While you do not have to state any of the definitions, you should have a conceptual understanding of each key term and key concept. For example, how are marginal benefits and marginal costs related to making decisions at the margin? How can we compare marginal benefits and marginal costs to determine efficiency? What is an unintended effect? What does “ceteris paribus” thinking mean? 2.What is a production possibilities frontier (PPF)? Which points on the frontier illustrate production that is efficient?...
A calorimetry investigation is performed to determine the heat of neutralization when hydrochloric acid and sodium...
A calorimetry investigation is performed to determine the heat of neutralization when hydrochloric acid and sodium hydroxide solutions are mixed. Write the complete chemical equation for the reaction between hydrochloric acid and sodium hydroxide. Write the net ionic equation for the reaction between hydrochloric acid and sodium hydroxide. The procedure then calls for measuring 50.00 mL of each 0.10 molar solution. Why is it important to measure the volumes as accurately as possible? What is the most accurate measuring instrument...
the molar absorptivity of the copper complex in chloroform at 436.0nm is 13,000 M-1 cm-1 which...
the molar absorptivity of the copper complex in chloroform at
436.0nm is 13,000 M-1 cm-1 which is useful
for the determination of Cu2+ concentrations as low as
10-6g/ml.
III. Interpretation of Results (a) Calibration curve Calculate the Cu2+ concentration of each standard solution in ug/mL (ug = 100 gram). Alternatively, ug/mL = ppm (part per million). Plot the net absorbance (= absorbance of standard - absorbance of blank) versus the concentration of each standard solution. sample volume 0 absorbance 0.061...
1) At 298 K, an equilibrium
mixture contains P H2=0.958 atm, P I2= 0.877 atm and P HI=0.020
atm. Please try and answer all!
You must show all your work to receive credit. Watch sig figs! Consider the reaction: 1) At 298 K, an equilibrium mixture contains P H2-0.958 atm, P ½=0.877 atm, and P HI-0.020 atm. Calculate the value of the equilibrium constant Kp? a) (o, o2) 0.938x o.87? b) And what is the value of the equilibrium constant...
(A) True or False, and explain! (30%) 1. It is impossible to explain why workers have the same productivity have different wage in a frictionless labor market. 2. If a person decreases working hour when his or her wage increase, we know that there is no substitution effect. 3. If a labor market has only one buyer of labor, we called it a monopolist. 4. The reservation wage of an unemployed worker is usually zero. 5. A wage increase would...
Chemie Heterogeneous Reaction Chemical reactions may be envisioned in terms of reactants and products and written in the general form A +bB - C +dD Reactants Products The equilibrium constant may be expressed in the form K - LORD up or K, - P2 where [C] represents the molar concentration of Catequilibrium. For a given reaction, the concentrations at equilibrium would have to be determined experimentally. In application, there are practical cases where some of the reactants and/or products do...
1. Is it possible for two different equipotential lines to cross each other? Explain why or why not? 2. Is it possible for two different electric field lines to cross each other? Explain why or why 3. Where do the electric field lines begin and end? If they are equally spaced at their beginning, 4. If you wanted to push a charge along one of the electric field lines from one conductor to the 5. The potential is everywhere the...
the molar absorptivity of the copper complex in chloroform at
436.0nm is 13,000 M-1 cm-1 which is useful
for the determination of Cu2+ concentrations as low as
10-6g/ml.
III. Interpretation of Results (a) Calibration curve Calculate the Cu2+ concentration of each standard solution in ug/mL (ug = 100 gram). Alternatively, ug/mL = ppm (part per million). Plot the net absorbance (= absorbance of standard - absorbance of blank) versus the concentration of each standard solution. sample volume 0 absorbance 0.061...
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