Question: The highest useful absorbance value is 2.00. Suppose that a calibration curve included a 19 ppm standard with an absorbance of 2.00. But when you

The highest useful absorbance value is 2.00. Suppose that a calibration curve included a 19 ppm standard with an absorbance of 2.00. But when you tested an unknown sample that obviously was much more concentrated, it also showed an absorbance of 2.00 (meaning 19 ppm). Then you diluted the unknown to 1/10th concentration and found that the diluted unknown sample had an absorbance corresponding to 2.6 ppm

a. Based on the 2.6 ppm reading for the dilution, what was the true (original) concentration of the unknown sample?

b. Briefly explain why the spectrophotometer incorrectly interpreted the original unknown (before dilution) as being only 19 ppm.

Step by Step Solution

★★★★★

3.48 Rating (145 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

Am 1 Based on 26 ppm rading use lambut beers law with standard ppm Solution 0 A Ecl 7 W... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Accounting Questions!

Managing Scope Changes Case Study Scope changes on a project can occur regardless of how well the project is planned or executed. Scope changes can be the result of something that was omitted during...

Planning is one of the most important management functions in any business. A front office managers first step in planning should involve determine the departments goals. Planning also includes...

The Crazy Eddie fraud may appear smaller and gentler than the massive billion-dollar frauds exposed in recent times, such as Bernie Madoffs Ponzi scheme, frauds in the subprime mortgage market, the...

(a) Let the modulated wave s (t) in Problem 2.42 be applied to a hard limiter, whose output z (t) is defined by below, show that the limiter output may be expressed in the form of a Fourier series as...

Sandoval Appliance Mart began operations on May 1. It uses a perpetual inventory system. During May the company had the following purchases and sales for its Model 25 Sureshot camera. Instructions(a)...

Farman Appliance Mart began operations on May 1. It uses a perpetual inventory system. During May, the company had the following purchases and sales for its Model 25 Sureshot camera. Instructions(a)...

Gretchens Kitchen is a fast-food restaurant located in an ideal spot near the local high school. Gretchen Lowe must prepare an annual smiling plan. The only menu Items are hamburgers, chili, soft...

On April 17, 2010, Kenneth Laurion, the father of Dennis Laurion (Laurion), was admitted to St. Lukes Hospital in Duluth [Minnesota] after suffering a hemorrhagic stroke. On April 19, Kenneth Laurion...

Refer to your answers for Filimonov Inc. in Cornerstone Exercises 6-22 through 6-24. Required: 1. In a period of rising prices, which inventory costing method produces the highest amount for ending...

Financing a Strategic Investment under Quantity Competition: Suppose you own a firm that has invented a patented product that grants you monopoly power. Patents only last for a fixed period of time ...

For each of the following cases, identify the accounting convention that applies, state whether or not the treatment is in accord with the convention and GAAP, and briefly explain why. 1. Dooley...

The following excerpt is from the Racial Proling Data Collection Resource Center (www.racialprolinganalysis.neu.edu/). In 2006, the New York City Police Department stopped a half-million pedestrians...

find the slope of ( x ^ 3 + 1 ) ^ 1 / 2 at ( 2 , 3 )

The following scenarios might constitute a violation of the AICPA's Code of Professional Conduct. Carrie Jones, CPA, performs various management services for The Perry Corporation including...

At the time of his death in 2018, Howard was married to Bella for over 40 years. Howard and Bella had two adult children (Max and Bertha). Max and Bertha each have their own children (Howards...

Poplar Outdoor Corporation owns 60 percent of the voting stock of Sugg Australia. Date-of-acquisition information is as follows: Acquisition cost: $59.25 million Fair value of the noncontrolling...

A written contract related to the purchase of the office trailer is subsequently signed, and the terms of the contract reflect that the trailer will be equipped with an HVAC system. The contract also...

Geneva Preschool provides free instruction for children from low-income families. Its January 1, 2016, trial balance is as follows: Debit Credit...

solve The following graph shows the foreign exchange market for the Brazilian real. Adjust the following graph to show the effect of a higher demand for soya on the Brazilian currency. The market for...

Briefly explain why the sparingly soluble product must be removed by filtration before you back-titrate the excess silver ion in the Volhard determination of (a) Chloride ion. (b) Cyanide ion. (c)...

Calculate the p-value for each of the listed ions in the following: (a) Na + , Cl - , and OH - in a solution that is 0.0635 M in NaCl and 0.0403 M in NaOH. (b) Ba 2+ , Mn 2+ , and Cl - in a solution...

What mass of solute in milligrams is contained in (a) 26.0 mL of 0.250 M sucrose (342 g/mol)? (b) 2.92 L of 5.23 x 10 -4 M H 2 O 2 ? (c) 673 mL of a solution that contains 5.76 ppm Pb(NO 3 ) 2...

The State Education Department requires local school districts to keep these records on all students: age, race or ethnicity, days absent, current grade level, standardized test scores in reading and...

Scientists at a major pharmaceutical firm conducted an experiment to study the effectiveness of an herbal compound to treat the common cold. They exposed each patient to a cold virus, then gave them...

Go to Statistics Canada's website: www.statcan.gc.ca. Search for "exports and imports," and answer the following questions related to imports and exports of goods (trade data for services are...