Logo
Home Study Material Contact Search
AI Chat FREE
  1. sciences
  2. chemistry
  3. the following information is to be used for the ne

The following information is to be used for the next two questions. Molar absorptivity data for...

60.1K

Verified Solution

Question

Chemistry

The following information is to be used for the next twoquestions. Molar absorptivity data for the cobalt and nickelcomplexes with 2,3-quinoxalinedithiol are εCo = 36400 and εNi =5520 at 510 nm and εCo = 1240 and ε Ni = 17500 at 656 nm. A 0.556-gsample was dissolved and diluted to 150.0 mL. A 25.0-mL aliquot wastreated to eliminate interferences; after addition of2,3-quinoxalinedithiol, the volume was adjusted to 50.0 mL. Thissolution had an absorbance of 0.866 at 510 nm and 0.218 at 656 nmin a 1.00-cm cell.

a.) Calculate the concentration of cobalt (in ppm) in theinitial solution prepared by dissolving the sample.

b.) Calculate the concentration of nickel (in ppm) in theinitial solution prepared by dissolving the sample.

Answer & Explanation Solved by verified expert
3.9 Ratings (540 Votes)
Here we have following two euations which have two unknown A 510 Co510bCo2 Ni 510bNi 2 A 656 Co656bCo2 Ni 656 bNi 2 Therefore A 510    See Answer
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Zin AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Q

Twenty economist were chosen randomly, and asked to predict if the national economy would improve during...

Statistics
Q

The diagram below shows the major processes that take place during the carbon cycle respiration...

Biology
Q

D Analyze the following diagrams to answer the questions that follow Below is an example...

Biology
Q

8 Name the longest side of ADEF F DE GEF HDF J cannot tell D...

Geometry
Q

In 3 minutes, a conveyor belt moves 600 pounds of recyclable aluminum from the delivery...

Basic Math
Q

Find the exact value without a calculator tan 15 sin 15 cos 15 30 2...

Algebra
Q

17 Find the domain f x 2 x x 3

Algebra
Q

. What percentage of medical insurance payments can self-employed taxpayers deduct...

Accounting
Q

Bunnell Corporation is a manufacturer that uses job-order costing. On January 1, the companys inventory...

Accounting
Q

Johnny Canuk's Friendly Pub employs a bartender and four servers Below are the hours...

Accounting
Q

Exercise 20-3 (Algo) Change from the treasury stock method to retired stock [LO20-2] In keeping...

Accounting
Q

A stock will pay a $2.25 dividend next year and will grow the dividend by...

Finance