Questions from General Chemistry

Q: The indicator HIn has an acid dissociation constant of 4.80

The indicator HIn has an acid dissociation constant of 4.80 × 10-6 at ordinary temperatures. The accompanying absorbance data are for 8.00 × 10-5 M solutions of the indicator...

Q: Calculate the absorbance (1.00-cm cells) at

Calculate the absorbance (1.00-cm cells) at 450 nm of a solution in which the total molar concentration of the indicator described in Problem 24-19 is 8.00 × 10-5M and the pH is a) 4.92, b) 5.46, c)...

Q: What is the absorbance at 595 nm (1.00-

What is the absorbance at 595 nm (1.00-cm cells) of a solution that is 1.25 × 10-4M in the indicator of Problem 24-19 and has a pH of a) 5.30, b) 5.70, c) 6.10? Indicator of Problem 24-19: The in...

Q: Several buffer solutions were made 1.00 x 10-4M

Several buffer solutions were made 1.00 x 10-4M in the indicator of Problem 24-19. Absorbance data (1.00-cm cells) are Calculate the pH of each solution. Indicator of Problem 24-19: Indicator HIn

Q: Constr uct an absorption spectr um for a 7.00 ×

Constr uct an absorption spectr um for a 7.00 × 10-5 M solution of the indicator of Problem 24-19 when measurements are made with 1.00-cm cells and a) b) c) Incicator of Problem 24-19:...

Q: Solutions of P and Q individually obey Beer’s law over a large

Solutions of P and Q individually obey Beer’s law over a large concentration range. Spectral data for these species in 1.00-cm cells are a) Plot an absorption spectrum for a solutio...

Q: a) Calculate E0 for the process / (

a) Calculate E0 for the process (b) Use the shorthand notation to describe a cell consisting of a saturated calomel reference electrode and a silver indicator electrode that could be used to measure...

Q: Use the data in Problem 24-24 to calculate the molar

Use the data in Problem 24-24 to calculate the molar concentration of P and Q in each of the following solutions: Data from Problem 24-24: Solutions of P and Q individually obey Beerâ€...

Q: A standard solution was put through appropriate dilutions to give the concentrations

A standard solution was put through appropriate dilutions to give the concentrations of iron shown in the accompanying table. The iron(II)-1,10,phenanthroline complex was then formed in 25.0-mL aliquo...

Q: The method developed in Problem 24-26 was used for the

The method developed in Problem 24-26 was used for the routine determination of iron in 25.0-mL aliquots of ground water. Express the concentration (as ppm Fe) in samples that yielded the accompanying...