Solution.   Vol. of A solution (mL)  [methyl red], M   Absorbance               1                         10.00                    _1.64 x10^-16_           _0.256_      2                        15.00                   _2.45 x10^-16_.          _0.373_      3                        20.00                   _3.27 x10^-16_.          _0.486_      4                        25.00                   _4.09 x10^-16_.          _0.620_   Plot a graph of the absorbance (y axis) as a function of the concentration of methyl red (x axis). What is the slope of the graph?

Q: 400 450 500 550 600 650 700 wavelength (nm) : Wavclength of maximum absorbance for base form ph…

A:

Q: Calculate the concentration of acid in each buffer solution. The pKa of acetic acid is 4.745. Sample…

A: Solution :        The concentration of a solution is defined as the mass of solute present in the…

Q: i: increase or decrease? ii:①0.01/0.02/0.03/0.04/0.05/0.06 ②0.01/0.02/0.03/0.04/0.05/0.06/0.07…

A: i) Increasesii) 1. 0.032. 0.043. 0.01Explanation:

Q: Calculate the [NH3] in a solution of 0.650 M ammonium fluoride (NH4F). Hint: Use the Ka of HF (6.8 x…

A: Equation for Ka of HF and Kb of NH3- HF aq ⇔H+aq + F-aqKa =H+F-HFNH3 aq⇔NH4+ aq+OH- aqKb =NH4+OH-NH3

Q: Use Beer’s Law to calculate the concentration of a sample of cyanmethaemoglobin if it has an…

A:

Q: Define λmax and explain why it is desirable to do the experimental procedure at λmax?

A: 1. Lambda max or λmax  refers to the wavelength along the absorption spectrum where a substance has…

Q: 3. Using the data at right: a. Calculate the absorbance of each sample. You will need to express the…

A: We need to calculate the absorbance for each standard concentration and then plot the absorbance vs…

Q: H)=0.00000199526 c). pOH = 9.7 %3D OH =1.9952683e-10 1x 10 -14 =D5.0118724e-15

A: Given, pOH = 9.7     Required,                     Concentration of H+ & OH- ions

Q: Table 1 Table 1: " Beaker Moles of SCN Moles of FESCN2+ Concentration Absorbance at of FeSCN2*(M)…

A: We need to write the descriptive titles for the three tables.

Q: Preparing and Diluting Solutions Data Table Test Tube 1* 2 4 10ML/3.8mL 2.4mL SmL 1.53ML…

A: We are given the data for the concentration of different diluted stock solutions and their…

Q: 10:11 PM Sun Feb 5 < 5 T B 100% + : 0 DH₂07 2) Na₂Cr₂O₂, H₂SO4, H₂0 7 3). Ph Mg Br 4) +₂0 1 1 < N.

A: In this question, we will draw the structure of the major organic product.  You can see the reaction…

Q: Part A a solution that is 0.13 M in NH3 and 0.17 M in NH4Cl (K (NH3) = 1.76 x 10-5) Express your…

A: Molarity of NH3 = 0.13 M Molarity of NH4Cl = 0.17 M Kb of NH3 = pH of solution = ?…

Q: A solution of a specific vitamin has a Amax of 261 nm and a concentration of 2.38 x 107 M. The…

A: The objective of the question is to determine the molar absorptivity.It is given that,The…

Q: a) Determine the concentration of your prepared Iron (III) Salicylate Dianion solution (pure ASA) in…

A: Beer-Lambert Law, also known as Beer's Law, relates the concentration of a solute in a solution to…

Q: Plot the following data and use the fitted equation for the line to determine the concentration (mM)…

A: Given data Fe(II)SO4 , Concentration,mM Absorbance  0 0 1 0.188 2 0.388 3 0.558 4 0.749…

Q: Question 12 of 23 Submit What is Kb for the conjugate base of HCN (Ka = 4.9 × 10-10)? 1 2 4 C 7 8 9.…

A: Given, Ka for HCN = 4.9 x 10-10  Kb = ?

Q: 1. Using one set of data from Table 1 above, calculate the molar absorptivity of the Cr3+ solution…

A: Answer: According to Beer-Lambert law relation between absorbance and molar absorptivity will be:…

Q: Ka for nitrous acid, HNO₂, is 4.00×10-4. Ką for benzoic acid, C6H5COOH, is 6.40×10-5 . Ka for…

A:

Q: Identify the species represented by each curve in the fractional composition diagram of a weak base…

A: Answer:Any specie that gains H+ ion in its solution is called Bronsted-Lowry base and the specie…

Q: Using the y intercept of the line how can you determine th Ka for Bromocresol green? Please show…

A:

Q: Question 1 a) Benzenecarboxylic acid, commonly known as benzoic acid, has a pK₁ of 4.20. Find the pH…

A: #(a):  pKa of benzoic acid(C6H5COOH) = 4.20  Ka = 10-pKa = 10-4.20 = 6.31*10-5   Initial…

Q: 3. The chemical sunset yellow, also knowm as yellow #6, looks yellow. What color(s) must be absorbed…

A:

Q: OCH 5- OCH, NO,

A: Given are aromatic compounds.We can prepare given compound from anisole by electrophilic aromatic…

Q: I Review | Constants | Part A 50.0 mL of 0.15 M HCHO2 with 80.0 mL of 0.12 M NaCHO2 Express your…

A:

Q: Calculate the molar concentration of Fe3+ and SCN- in each of the three unknown samples (sample…

A: The molar concentration of a species in a sample is defined as the number of moles of the species in…

Q: 3.) A standard reference FeSCN2+ solution (0.020 M) has an absorbance 1.070. What is the…

A: Since the absorbance is proportional to the concentration of the ion. Hence we can say  A = K C…

Q: A sample of a sports drink containing the dye was assayed using the prescribed method and found to…

A: We know Beer-Lambert law equation as: A = E*l*c where A = Absorbance            E = Molar…

Q: Calculate the [NH3] in a solution of 0.610 M ammonium fluoride (NH,F). Hint: Use the Ka of HF (6.8 ×…

A: The correct Kc value is given below

Q: a. The graph shows that the basic form has a maximum absorption at Amax, while the acidic has its…

A: The bromocresol green, commonly known as BCG, is an indicator and it has both acidic and basic form.…

Q: Beaker 1 2 3 4 [FeSCN²+] (copy this from your prelab calculations) 1.6x10 1.2x10" M 8x105M 4x10 "M…

A: The best fit line equation shows the relation between the x-axis and y-axis quantities. This…

Q: If the absorbance of one of the buffer solutions was 0.123 and the absorbance of the basic solution…

A: The link between the precise amount of substance present and the intensity of visible UV light is…

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.