Compute the mass percentage of the cobalt

Reference no: EM13186459

A 4.97 g sample of petroleum was decomposed by wet-ashing and then diluted to 500 mL in a volumetric flask. Cobalt was determined by treating 25.00 mL aliquots of this diluted solution with an organic molecule, called a ligand, that binds cobalt with a colour change (colourless to green).

The data is shown in the table below:

Reagent volume (mL)

Co2+ (3.00 ppm) Ligand (0.010 M) H2O Absorbance (600 nm)

0.00 20.00 5.00 0.398

5.00 20.00 0.00 0.510

It is known that the Co2+-ligand complex obeys the Beer-Lambert Law.

Calculate the mass percentage of the cobalt in the original sample.

Reference no: EM13186459

Questions Cloud

Find the cost depletion allowance the company can claim : NA Forest Resources purchased forest acreage for $500,000 from which an estimated 200 million board feet is recoverable. In its first year of operation, the company recovered 24 million board feet. Find the cost depletion allowance the company c..

Explain what is the apparent mass of a protein : protein used as standards on an SDS- polyacrylamide gel are 0.80 and 0.41, respectively. What is the apparent mass of a protein having a mobility of 0.62 on this gel?

What is the optimal strategy for the firm : If there is asymmetric information what is the optimal strategy for the workers What is the optimal strategy for the firm Is the employment contract between the firm and the workers self-enforcing If yes, why If not, which would be a self-enforcing..

Depict the structure of the peptide wrcfq : Draw the structure of the peptide WRCFQ. Show the ionization state that would be the major form at pH 7. (Note: this question addresses your knowledge of the one or three letter codes for amino acids,

Compute the mass percentage of the cobalt : It is known that the Co2+-ligand complex obeys the Beer-Lambert Law. Calculate the mass percentage of the cobalt in the original sample.

Describe efficiency wage models : Someone claims that under efficiency wage models "if the wage rate increases in a market with heterogeneous workers then we will have a shift in the labor demand curve, and not a movement along the c..

Molecular chlorine affords a mixture of monochlorinated : The photochemical reaction of 2,4-dimethylpentane with molecular chlorine affords a mixture of monochlorinated alkyl halides. Draw teh structures of these products and predict the molar ratio when the reaction is run at 25C

What is the relative difference in the access to funds : Assume there is an imperfect capital market. Draw a graph to show the optimal years of schooling for an individual with high access to funds but of low ability and an individual with low access to funds but with ..

Discuss the business problem : Provide a clear statement of the aims and objectives of the data analytics study and the possible outcomes in terms of discovered knowledge and its potential application towards solution of the problem. In this section you need to discuss the busi..

User Account

All Pages