Sample (μg) Absorbances (520 nm) Concentration 0.0 0.621 0 2.5 0.599 2.5 5.0 0.556 5 10.0 0.469 10 15.0 0.418 15 20.0 0.291 20 Plot a graph in which y axis represents for absorbance and x-axis represents for concentration From graph, y=mx + c

Sample (μg) Absorbances (520 nm) Concentration 0.0 0.621 0 2.5 0.599 2.5 5.0 0.556 5 10.0 0.469 10 15.0 0.418 15 20.0 0.291 20 Plot a graph in which y axis represents for absorbance and x-axis represents for concentration From graph, y=mx + c

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter4: Least-squares And Calibration Methods

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: The following initial rate data were found for the reaction 2MnO4 + 5H2C2O4 + 6H+ → 2 Mn²+ [MnO4-]…

Q: Which best describes the ICl₂ ion? (That's an iodine and two chlorines with a negative charge)…

A: Steric number helps us to predict the structure of a compound with the help of VSEPR theory.

Q: 8. Complete the following precipitation or acid/base reactions with balanced total ionic equations:…

A: Given:A balanced chemical equation is a representation of a chemical reaction using chemical…

Q: Q1. Calculate how many moles of NaOH are in 50.00mL of a 6.82M NaOH solution. Molar mass NaOH =…

A: Molarity (M) is a concentration term for a solution. The molarity of a solution is defined as the…

Q: 1) as E or Z. Assign the stereochemistry of the following alkene-containing compounds Br

A: If same priority groups are on the same side of the double bond, then it is called 'Z' - alkene If…

Q: How many grams of Oxygen are in 10 moles of CO2?

A: moles of CO2 = 10 molesmass of Oxygen = ?Note: molar mass of Oxygen = 16.0 g/mole

Q: Draw a structural formula for the molecular (no ions) product that forms in the following reaction.…

A: Amides are the most stable carboxylic acid derivative and they can hydrolyze into carboxylic acid in…

Q: Draw the electron configuration for a neutral atom of carbon. energy 0 1 1 X S

Q: Which one is the major organic product obtained from the following reaction? OH Ph. 1. NaOCH3 CH3OH…

A: In the Claisen condensation reaction, two esters are combined, and a water molecule is released.

Q: 1. Given that the Kw= 1.14 x 10-¹5 at 273 K, what is the pH of a neutral solution at 273 K?

A: Answer-1pH actually tells about the strength of hydrogen ion concentration in a solution. Its value…

Q: The activation energy for the gas phase decomposition of t-butyl alcohol is 274 kJ. (CH3)3 COH →…

Q: Convert the values of K, to values of K or the values of P (a) H₂O()=H₂O(g) K = 0.26 at 65°C (b)…

A: The formula that relates the equilibrium constant in terms of partial pressure and the equilibrium…

Q: The reaction 2 NO(g) + Cl2(g) → 2 NOCl(g) is 2nd order in NO and 1st order in Cl2. 5 mol of nitric…

Q: tab 6:36 PM Mon Oct 9 What quantity in moles of precipitate will be formed when 78.3 mL of 0.300 M…

A: The question is based on the concept of reaction stoichiometry.We need to calculate quantity of…

Q: Draw the most stable chair conformation

A: Given compound is cyclohexane derivative.The most stable chair conformation is one in which more…

Q: What is the correct label for B? A. Water B. One Amine C. One Metabolism

A: In the given reaction, compound A which is an ether compound reacts with a water molecule to give to…

Q: Investigation 5.5.1 ACTIVITY Calorimetry versus Enthalpies of Formation In this activity, you will…

A: The objective of the question is to calculate the enthalpy of combustion for ethanol.

Q: Predict the direction of the following reaction. Approximate pKa values in water are provided. pka…

Q: HIZO :O: IV V ON=N=CH₂

A: Molecular Geometry: The molecular geometry of a molecule refers to the arrangement of its atoms in…

Q: A 0.700-g sample is analyzed spectrophotometrically for manganese by dissolving it in acid and…

A: The molar concentration of manganese is = The volume of the solution is = 250 mLThe molar mass of…

Q: The protein content of wheat flour can be determined with reasonable accuracy using the gravimetric…

A: The protein content of wheat flour is an important factor that affects its nutritional value…

Q: At 25°C, what are the molar H3 OT and OH concentrations in Visited a. 0.0640 M C6H5 COOH (K. (C6H5…

Q: If the CaCl₂ was available not as a solid, but rather as a 0.40 molar solution, how many mL of that…

A: Molarity (M) is a concentration term for a solution. The molarity of a solution is defined as the…

Q: Methane and water react to form hydrogen and carbon monoxide, like this: CH4(9)+ H₂O(g) → 3…

A: According to Le - Chatelier's principle if any changes are made at equilibrium then equilibrium…

Q: Which molecule experiences the most angle strain?

A: Given are cyclobutane and cyclobuetene derivative The bond angle of the tetrahedral carbon atom (sp3…

Q: Ranitidine sulfur-containing side chain has substituted guanidine with pka of 2.7 for the secondary…

A: Ionization suggests the existence of a compound as an ionic species or ions. That is, a compound…

Q: A gold cube is 150.00 mm long, 10.00 cm wide, and 0.95 m thick. If gold has a density of 19.3g/cm^3,…

A: The density of any substance is defined as the ratio of its mass to the volume of the substance.

Q: Suggest a synthesis of 2-methyl pentanoic acid from pentanoic acid, as shown below. You must pay…

A: To happen the reaction a good method is the chiral auxiliary approach, where the substrate is…

Q: Select the pH range where you would find the following amino acid primarily in the ionization state…

A: If the pH is greater than pKa then deprotonation occurs and it exists in deprotonation form. While…

Q: Draw structural formulas for both resonance structures of the enolate ion obtained by treating the…

A: We have to draw the resonance structure of the carbonyl compound.

Q: Draw the product(s) of the following reactions. 1. BH3/THF 2. H₂O₂ / aqueous NaOH H3C-CEC-H

Q: Based on the selection rules of Raman and IR spectroscopy, for acetyl salicylic acid/aspirin, what…

A: IN IR AND RAMAN SPECTROSCOPE, WHAT MODES ARE ACTIVE?A basic check of the irreducible representation…

Q: Draw all stereoisomers CI CI CI CI

Q: A quantity of CO gas occupies a volume of 0.38 L at 2.0 atmatm and 281K. The pressure of the gas is…

A: Answer:Here:

Q: Choose the conditions for the following ring opening reaction R * Incorrect. If the epoxide…

A: The question is based on the concept of organic synthesis. We need to synthesize the product using…

Q: (3) Evaluate the following uses of catalysis in terms of the goals of green chemistry (it is up to…

A: In the context of green chemistry, which aims to promote sustainable and environmentally friendly…

Q: 4 Br

Q: Starting from the left side of the molecule and moving to the right side of the molecule, assign the…

Q: See Figure 7-4 Which form of glucose can have all of its substituents in the equatorial position? a…

A: Different conformations of glucose arise in a system due to the difference in the relative positions…

Q: Draw all stereoisomers I"H CI OH

A: We have to draw all stereoisomers of the given compound.

Q: Draw the structure of compound A. Be sure to include stereochemistry.

A: The question is based on organic reactions. We need to identify the product and explain its…

Q: Which molecule experiences the most angle strain?

A: The bond angle of the tetrahedral carbon atom (sp3 hybridized carbon atom) is 109.5o. In the…

Q: 4.- Determine the structural relationship between the compounds in each of the pairs that follow.…

A: Since you have asked a question with multiple sub-parts, we will solve the first three parts for…

Q: draw the major organic products the student would expect from their mechanism. Be sure to use wedge…

A: The question is based on organic reactions. We need to identify the product and explain its…

Q: 2a. Circle the most acidic compound. 2b. Box the least acidic compound. О F F ОН ОН F О ОН

A: All the given carboxylic acids have fluorine atoms attached to it at various positions. Since…

Q: Draw the major product of this reaction. Ignore inorganic byproducts. Na, NH3 CH3CH3OH Q

A: Given,The reaction:

Q: Arrange the following from lowest to highest entropy: MgSO, (s), CaSO4 (s), BaSO4 (s). MgS(s).…

A: Answer:Entropy of a system is the measure of its randomness or disorderliness. In more possible…

Q: Using Cahn-Ingold-Prelog rules, rank these substituents from highest priority to lowest priority.…

Q: which of these molecules have a N with linear geometry?

A: According to VSEPR Theory, Steric Number= no. of Sigma bonds + no. Of lone pairs Steric no.0 L.P.1…

Q: Draw the product of the reaction shown below. Ignore inorganic byproducts. SnCla

A: Thus is a reduction reaction of p-benzoquinone derivative by using SnCl2 reagent.This reaction…

Concept explainers

Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.

Question

*Sample (μg)*	*Absorbances (520 nm)*	*Concentration*
*0.0*	0.621	0
*2.5*	0.599	2.5
*5.0*	0.556	5
*10.0*	0.469	10
*15.0*	0.418	15
*20.0*	0.291	20

Plot a graph in which y axis represents for absorbance and x-axis represents for concentration

From graph, y=mx + c

Calculate the vitamin C concentrations of samples by the equation with consideration of dilution factors.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: Required Data

VIEW

Step 2: Graph

VIEW

Solution

VIEW

Step by step

Solved in 3 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

Part III: Determination of Saturated Solutions Molarity (saturated) Tube # Temperature (°C) Molarity (dilute) Absorbance 2 0.6 0.157 20.1 0.291 4 37.6 0.351 50.1 0.500 6. 70.9 0.714 show calculation for Tube #2, Molarity (dilute) (use graph equation): show calculation for Tube #2, Molarity (saturated): 1. Is the relationship between solubility and temperature direct or inverse? Explain.
For the following questions (Q1-Q5), consider the compound tartrazine (Yellow 5 food dye) that has a chemical formula of C16H9N4Na3O9S2. Ana weighs out 0.1328 g of tartrazine powder on the balance for her experiment and makes a stock solution by dissolving her powder in 500.0 mL of solution. Concentration (µM or µmol/L) Absorbance 0.00 0.001 9.94 0.252 19.9 0.506 29.8 0.738 39.8 1.018 slope (m): 0.02534 1/(µM) y-intercept (b): -0.0009147 Q5. If Ana determines the absorbance of an unknown tartrazine sample to be 0.662, what is the concentration of the sample in µM?
For the following questions (Q1-Q5), consider the compound tartrazine (Yellow 5 food dye) that has a chemical formula of C16H9N4Na3O9S2. Ana weighs out 0.1328 g of tartrazine powder on the balance for her experiment and makes a stock solution by dissolving her powder in 500.0 mL of solution. Concentration (µM or µmol/L) Absorbance 0.00 0.001 9.94 0.252 19.9 0.506 29.8 0.738 39.8 1.018 slope (m): 0.02534 1/(µM) y-intercept (b): -0.0009147 Q4. Calculate the molar extinction coefficient (molar absorptivity) of tartrazine in units of 1/(M·cm). Assume a cuvette path length of 1.00 cm.
Solution Concentration of FeSCN2+ (M) Absorbance1 0.0000491 0.3112 0.0000818 0.5763 0.000115 0.7554 0.000152 0.9075 0.000196 1.185 Solution Concentration of FeSCN2+ (M) Absorbance 1 0.0000491 0.311 2 0.0000818 0.576 3 0.000115 0.755 4 0.000152 0.907 5 0.000196 1.185 A series of aqueous solutions of FeSCN2+ of different concentrations were prepared, and the absorbance of each was measured at a wavelength of 455 nm. Use Excel or Google Sheets to prepare a useful graph of the data (given below) that could be used to determine the concentration of an unknown solution from its absorbance. Ensure your graph is properly formatted and labeled. Click the…
Assume you have 0.1 M NaOH Trial 1: 22.5 mL NaOH Trial 2: 25.6 mL NaOH Trial 3: 24.4 mL NaOH
1. 500.0 mL 0.2 M KI2. 500.0 mL 0.2 M KCl3. 500.0 mL 0.1 M K2S2O84. 500.0 mL 0.1 M K2SO45. 500.0 mL 4.0 mM Na2S2O3 (from Na2S2O3∙5H2O)pls compelete the 2nd table given the data
Data Table 1 Enter the calculated molarity and measured conductivity values in the table. Data Table 1: Experimental Data Sodium Total Sodium Chloride Standard Chloride Volume Concentration (M or Conductivity (µS) (g) (mL) mol/L) Blank 100.00 8.965 A 0.0059 100.00 В 0.0531 100.00 0.1029 100.00
Bromophenol blue= max 600 concentration (M) of the original solution =10.0 mg/L absorbance solution 1 = 0.20 solution 2 = 0.43 %3D %3D solution 3 = 0.66 solution 4 = 0.93 %3D solution 5 = 1.10 I need the concentration (M) in all the solution
Mass of aspirin used is .090 g the absorbance for the final solution was .304 nm Slope is 1708 and y-intercept is -0.03397 what is the molarity of the final unknown solution and the molarity of the original solution made from aspirin in the 250.0 ml flask
Table 1: Absorbance of X solution (575 nm) Concentration (mg/ml) Absorbance 0.025 0.220 0.050 0.440 0.100 0.760 0.150 1.250 0.200 1,460 unknown 0,640
12) Organic chemistry subject, please provide the correct solution for the following.
Part Il: Determination of Standard Solutions mL of 0.200 mL H20 added M Cuso, diluted Tube # M Cuso4-5 H20 added Absorbance about 3 0.200 1.346 3. 4.00 1.00 0.945 4 3.00 2.00 0.715 2.00 3.00 0.469 6. 1.00 4.00 0.281 show calculation for Tube #3 diluted concentration: