Log in
Chemistry
1
answer
0
watching
104
views
17 Nov 2019

20.00ml of unknown sample is diluted to 250ml absorbance 0.2430. absorbance for 70.00 ppm standard is 0.95. what is ppm concentration in original undiluted sample?

thanks!!

Watch
1
answer
0
watching
104
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Beverley Smith
Beverley SmithLv2
12 Jan 2019

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
discord banner image
Join us on Discord
Chemistry Study Group
Join now

Related textbook solutions

Basic Chemistry
5 Edition,
Timberlake
ISBN: 9780134138046
Principles of Chemistry Molecular Approach
4th Edition,
Tro
ISBN: 9780134112831
Chemistry: Structure and Properties
2nd Edition,
Tro
ISBN: 9780134293936
Principles of Chemistry Molecular Approach
3rd Edition, 2014
Tro
ISBN: 9780321971944
Chemistry: A Molecular Approach
3rd Edition,
Tro
ISBN: 9780321809247
Chemistry: A Molecular Approach
5th Edition,
Tro
ISBN: 9780134874371
Principles of Chemistry: A Molecular Approach
4th Edition,
Tro
ISBN: 9780134895741
Chemistry: The Central Science
14th Edition, 2017
Brown
ISBN: 9780134414232

Related questions

An unknown sample of Cu2+ gave an absorbance of 0.263 in an atomic absorption analysis. Then, 1.00 mL of solution containing 133.00 ppm Cu2+ was mixed with 91.00 mL of unknown, and the mixture was diluted to 100.00 mL in a volumetric flask. The absorbance of the new solution was 0.490. Find [Cu2+] (ppm units) in the unknown.

25.0 ml C solution is diluted to 50.0 ml and the absorbance is 0.416 in 348 nm in a 1.00-cm cuvette. 25.0 ml second solution is added 10.0 ml solution that contains 23.4 ppm of C. After diluted to 50.0 ml this solution has absorbance 0.610 in the same cuvette and wavelength. Calculate concentration (ppm) C in sample.


Weekly leaderboard

Home
Homework Help 3,900,000
Chemistry 830,000
Start filling in the gaps now
Log in