The molar absorptivity (ε) of the FeSCN2+ complex ion is 4700 M-1 · cm-1 at a wavelength of 450 nm. Using a 1-cm sample tube, you measure the absorbance as (2.0x10-1). What is the concentration of FeSCN2+? W

The molar absorptivity (ε) of the FeSCN2+ complex ion is 4700 M-1 · cm-1 at a wavelength of 450 nm. Using a 1-cm sample tube, you measure the absorbance as (2.0x10-1). What is the concentration of FeSCN2+? W

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter25: Instruments For Optical Spectrometry

Section: Chapter Questions

Problem 25.23QAP

See similar textbooks

Related questions

Q: wnite the molecular equation which completes the following. The reaction occurs in an aqueous soluti...

A: Answer: This is primarily an acid-base neutralization reaction.

Q: Give a clear handwritten answer about DNA look the DNA sketch and describe how to stands are attache...

A: Given : We have to explain how DNA strands are attached with each other.

Q: Discuss the role of Cyrus the Great in the establishment of the Achaemenid (Persian) Empire and the ...

A: Cyrus was the founder of Achaemmenid empire.His empire was started from Aegan Sea to Indus river. Cy...

Q: PLEASE ANSWE.R BE.LOW

A: We have to assign the oxidation state of each element.

Q: Q6. Provide a step-wise synthesis for the following compound using benzene as a starting material. B...

Q: Q: A cylinder containing CH4, C;H6, and N2 has to be prepared in which the ratio of the moles of CH4...

Q: CaSO;(4) + 2HI(aq) → Calą(aq) + SO; (9) + H;0(!) Dwrite corresponding net lonic equation. Caso,(0) +...

Q: Balance the chemical equation: C4H8 + O2 → CO2 + H2O There is a blank for all coefficients - s...

Q: Which of the following best describes monocistronic and polycistronic genes? Choose one: A. Monoci...

Q: 2,2-dimethyl-1-propanol

Q: (b) (d)

Q: 4/ ________ is isoelectronic with scandium. Sr2+ Mn5+ Mn4+ Mn4- Mn

A: ANS. MN+4

Q: C. PARAFFIN 1. Place a paraffin about the size of a rice grain in a dry test tube. Warm gently and a...

A: Paraffin is a petroleum product. It is a highly branched saturated hydrocarbon of alkane class. So, ...

Q: According to the following reaction, how many grams of calcium hydroxide are necessary to form 0.439...

A: Reaction : Sulphuric acid (aq) + calcium hydroxide (s) ----> calcium sulfate (s) + water(l) Nu...

Q: In an explosive chemical reaction, potassium metal reacts with water to form potassium hydroxide, KO...

A: Reaction : _K + _H2O ---> _KOH + _H2 Mass of K (potassium) = 1.73 g Mass of H2O = 3.00 g Wh...

Q: Abel reacts copper with silver nitrate and recovers 5.2 g Ag. However, after mass to mass stoichiome...

A: The theoretical yield of silver is = 9.5 g The actual yield of the silver in the reaction is = 5.2 g...

Q: `NH2 `OH А. В. С. D. 2000 1000 Waenumere m1) Ignore the peaks above O Wavenumbers em 4000 2500 2000 ...

A: IR provides the information of functional groups of unknown compound.

Q: Calculate the following quantity. Show your complete solution. 1.) mass in grams of 1.95x1026 HCl

A: One of any substance contains approximately 6.023 x 1023 molecules of that substance.

Q: At 25oC the vapor pressure of pure benzene is 93.9 torr. When a non-volatile solvent is dissolved in...

Q: Predict the products of the following acid-base reaction. Identify and label the conjugate acid / ba...

A: Complete the given reaction and identify acid-base pairs ----

Q: Calculate the mass of each element in Rhenium Bromide (ReBr3) when 93.7 g of Bromine gas (Br2) react...

Q: moles

A: Since you have asked multiple questions, we will solve the first question for you. If you want any s...

Q: Draw the coupling product of the Pd(0)-catalyzed Suzuki reaction between the compounds shown. Select...

A: The Pd(0) catalyst in the Suzuki reaction will form a coupling product and this coupling product wil...

Q: why ny is Bacly:2H,0 not written as Bacla Hy Oz

A: Why BaCl2.2H2O is written as BaCl2H4O2 ?

Q: In an aqueous solution at 25°C, if [H,O*] = 2.9 × 10 M, then [OH] is:

A: Given :- [H3O+] at 25°C = 2.9 × 10-4 M To be calculated :- [OH-]

Q: 8. Name these compounds

Q: The absorbance of sample A is higher than the absorbance of sample B. Therefore, sample A has (c...

Q: 2. When we use the stopped-flow method to determine the rate constant, which result is more accurate...

A: Stopped flow method is a rapid kinetics technique to determine rate constant.

Q: Explain how the concept of atomic number leads to the synthesis of new elements in the laboratory; G...

A: Atomic number is equal to number of protons and also equal to number of electrons in an unchaarged s...

Q: Find the percent composition of each element in Sodium Citrate (Na3 C6 H5 O7).

Q: 1.0 g of a mixture containing 80% CuSO4.5H2O is taken and heated to 120 oC and 160 oC. According to ...

A: Solution == Given that 1.0 g of a mixture containing 80% CuSO4.5H2O a) ...

Q: A tiny sample of an aqueous solution of two substances R and P is sketched below, as if it was under...

A: The equilibrium constant of a chemical reaction is the value of its reaction quotient at chemical eq...

Q: The neutralization reaction between hydrochloric acid and calcium hydroxide produces calcium chlorid...

A: Solution-

Q: Name the molecule below: * NH, F ОН

Q: What is the molar solubility of AgCl (Ksp = 1.80 x 1010) in 0.800 M NH,? (Kf of Ag(NH,),* is 1.7 × 1...

Q: 3. For each of the following molecules or ions: i. Write an MO energy level (orbital correlation) di...

A: Bond order = (Number of electrons in BO/Number of electrons in ABO)/2

Q: This genotype has two of the same dominant alleles and is expressed with two HH.

A: Please find your solution below : Genotypes is defined as the collection of genes of an individual. ...

Q: A compound has the empirical formula CHI. A 256-mL flask, at 373 K and 750. torr, contains 2.31 g of...

Q: I. Define the following terms: i. Cleansing and cold cream j. Foundation and vanishing Cream k. N...

A: As per the rules the first three subparts can be answered:

Q: balance the equation and the charge

A: A redox reaction is balanced by balancing the mass and charge. In an acidic medium, the charge of th...

Q: Question: Assign the 1H NMR peaks to the correct protons and provide an explanation to justify. OH M...

A: We have been given the structure of Dihydroepiepofomin along with the 1H NMR data and been asked to ...

Q: Name the molecule below: * НО NH, NH,

A: In IUPAC nomenclature, the longest C chain with the highest priority group is the parent chain and i...

Q: Sodium reacts with oxygen to produce sodium oxide in a synthesis reaction. A chemist needs to produc...

A: Sodium metal reacts with oxygen to form sodium oxide. The equation for the balanced chemical reactio...

Q: 9. Use the following thermochemical equations as needed to find the heat of formation of diamond: C(...

A: Given equations are : 1). C (diamond) + O2 (g) --------> CO2 (g) , ΔH1 = -395.4 KJ 2). 2CO2 (g...

Q: conducting if the solutes are _________________. Select one: a.

A: Electrolytes are the substance which are dissociated into ions. So, in Electrolytes conductance is d...

Q: Which statement explains why the pH at the stoichiometric point in the titration of a weak acid with...

Q: A.) If 11.3 g of KBr (MM = 119.00 g/mol) are added to a 500.0 mL volumetric flask, and water is adde...

A: We have to predict the A. Concentration B. Molarity C. Moles

Q: A 50.0 mL sample of 0.350 M HBr is titrated with 0.200 M KOH. At what volume (in mL) of titrant adde...

Q: Find the heat of metal and the specific heat capacity (below are the values) Mass of metal 23.20...

A: According to the law of conservation of energy, heat can neither be created nor destroyed, it can be...

Q: Sodium chloride can be produced from reacting sodium metal with chlorine gas. Carly reacts 2.6 g of ...

A: Sodium reacts with chlorine to form sodium chloride. The equation for the balanced chemical reaction...

Concept explainers

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.

Question

The molar absorptivity (ε) of the FeSCN²⁺ complex ion is 4700 M^-1· cm^-1at a wavelength of 450 nm. Using a 1-cm sample tube, you measure the absorbance as (2.0x10^-1). What is the concentration of FeSCN²⁺? What is your answer?

_____________x10^_____

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3:- Answer

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

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

45.0 mL of an unknown FeCl3 solution is diluted to a total volume of 230.0 mL. The diluted FeCl3 solution measured an absorbance of 0.223. Calculate the molarity of the undiluted unknown FeCl3 solution if the molar extinction coefficient is 230.0 M-1⋅cm-1 and a path length of 1.00 cm. Group of answer choices 0.000190 M 0.00496 M 0.00593 M 10.0 M 0.00399 M
"[FeSCN2+]eq is calculated using the formula: [FeSCN2+]eq = Aeq/Astd? [FeSCN2+]std where Aeq and Astd are the absorbance values for the equilibrium and standard test tubes, respectively. [FeSCN2+]std is calculated assuming all moles of SCN- go to form [FeSCN2+]std as shown below. " My question is; what do they mean by standard test tubes respectively? Are they talking about the container it's being held in? For me it's 10
A student prepared a calibration plot for a series of iron(II)-1,10-phenanthroline complex standards. On the x axis is Fe concentration in ppm. On the y axis is the absorbance (M). The plot's equation is y = 0.2471x + 0.006 What is the ppm absorptivity of this solution if the pathlength of light is 1 cm?
45.0 mL of an unknown FeCl3 solution is diluted to a total volume of 230.0 mL. The diluted FeCl3 solution measured an absorbance of 0.223. Calculate the molarity of the undiluted unknown FeCl3 solution if the molar extinction coefficient is 230.0 M-1⋅cm-1 and a path length of 1.00 cm.
The absorbance of an iron() thiocyanate, Fe(SCN) 3 (MM=230.09 g/mol) , solution containing 0.00955mg / m * L is reported as 0.376 at 540 nm. Calculate the specific absortivity of iron() thyocyanate with units c * m ^ - 1 * (mg / m * L) ^ - 1 A 0.58 cm sample cuvette is used. Report your answer to 3 significant figures.
Preparing a standard curve. 1. determine the absorbance max of [FeSCN]2+ it is 448.1 2. determine the concentration of FeSCN2+ in the stock solution. M1V1=M2V2 stock solution: ~0.200 M iron (iii) nitrate in 1M nitric acid intial volume: 0.3mL final volume: 10.3mL volume: 10mL ~0.002M potassium thiocyanate initial volume: 0.3mL final volume: 10.3mL volume: 10mL not sure if this is needed stock solutions: ~0.200M iron (iii) nitrate in 1M nitric acid: 0.207M ~0.002M iron (iii) nitrate in 1M nitric acid: 0.00209M ~0.002M potassium thiocyanate: 0.00193M
A solution of a specific vitamin has a 4max of 271 nm and a concentration of 2.73 x 10-"M. The absorbance of the solution at 271 nm is A = 0.155. What is the molar absorptivity of the vitamin at 271 nm? A sample path length is 1.00 cm. molar absorptivity: L mol-'cm-!
What is the Metal to Ligand Ratio based on the results below? 0.001 M 0.001 M Metal Volume (mL) Ligand Volume (ml) 10 9 8 7 6 5 4 3 2 1 0 O M2L5 O ML O ML2 O ML3 O ML4 ML6 0 1 2 3 45 4 5 6 7 8 9 10 Absorbance at 600 nm 0.000 0.253 0.502 0.722 0.897 0.955 0.901 0.744 0.508 0.261 0.010
We can determine the copper(II) ion content of a sample using spectrophotometry. The following data was collected. Construct a calibration plot and determine the slope. Absorbance 0.065 0.205 0.338 0.474 0.598 2.3 x 10-3 3.3 x 104 3.1 x 10-5 3.3 x 10-2 [Cu²+], M 2.00E-06 6.00E-06 1.00E-05 1.40E-05 1.80E-05
The standard curve was made by spectrophotographic analysis of equilibrated iron(III) thiocyanate solutions of known concentration. You are asked to analyze a Fe(SCN)2+Fe(SCN)2+ solution with an unknown concentration and an absorbance value of 0.4150.415 . The slope-intercept form of the equation of the line is ?=4558.4?+0.0147y=4558.4⁢x+0.0147 . The unknown was analyzed on the same instrument as the standard curve solutions at the same temperature. What is the Fe3+Fe3+ concentration of the unknown solution?
5. The detection limits reported for Aluminum with ICP-AES and GFAAS are 2 ppb and 5 pg, respectively. If we assume a 20-µL sample volume is used with the GFAAS determination, which method has the better (i.e., lower) detection limit? (I am expecting a calculation here.)
calculate the [FESCN2+] using volumes of stock solutions. Presume that all of the SCN- ions react. Next, record the light absorbance values of each standard solution. Volume Volume Volume [FESCN2+] Absorbance Standard Fe(NO3)3 SCN- H2O sample (mL) (mL) (mL) 1 2.50 2.00 20.50 0.1811 2 2.50 1.50 21.00 0.3219 2.50 1.00 21.50 0.4981 4 2.50 0.50 22.00 0.6328 Stock [Fe(NO3)3] = 0.200 M, Stock [SCN-] = 0.0020 M. %3D