Calculate the Ka value and the EL and EHL values at each wavelength, in one global minimization.

Multiple-Wavelength Regression. Dissociation of the second hydrogen ion of Tiron ( 1,2-dihydroxybenzene-3,5-disulfonate, H2L) does not begin until the pH is raised above 10. The pKaz of Tiron was determined spectrophotometrically by recording the spectrum at constant Tiron concentration and varying pH. The spectra are shown in the following figure; the absorbance readings (from 226 nm to 360 nm in 2-nm increments) at each pH value are tabulated on the CD that accompanies this text.

The equilibrium reaction being measured is (charges omitted for clarity)

The dissociation of H2L to HL- is complete at pH values of 10 and higher, and can be neglected. The concentrations of L and HL are given by the following expressions:

where LT is the total concentration of Tiron in the solution. The absorbance at a given wavelength is the sum of the contributions of the two species, that is,

where E is the molar absorptivity of the species, a constant at a given wavelength. Calculate the Ka value and the EL and EHL values at each wavelength, in one global minimization. (Excel’s Solver can handle up to 200 changing cells, so we are pushing the limit here.) You will need to calculate the sum-ofsquares-of-residuals for each wavelength, and minimize the “grand total” for all wavelengths. The Solver may have trouble “digesting” all this data. If so, use the Solver with data at a single wavelength to get the values of Ka, E~ and EHL, then use these as starting value for a global minimization.

find the cost of your paper

Suggest a modification of the binary search algorithm that emulates this strategy for a list of names.

1. Suppose that a list contains the values 20 44 48 55 62 66 74 88 93 99 at index positions 0 through 9. Trace the values of the variables….

Explain why insertion sort works well on partially sorted lists.

1. Which configuration of data in a list causes the smallest number of exchanges in a selection sort? Which configuration of data causes the largest number of exchanges? 2. Explain….

Draw a class diagram that shows the relationships among the classes in this new version of the system

Jack decides to rework the banking system, which already includes the classes BankView, Bank, SavingsAccount, and RestrictedSavingsAccount. He wants to add another class for checking accounts. He sees that savings….