Penicillin heralded the dawn of the antibiotic age when it was discovered in 1928 and is now the most widely used antibiotic in the world. A membrane electrode was developed for the quantitative analysis of penicillin. The table above shows the data which were collected using a set of penicillin standards against saturated calomel electrode. An unknown sample produced a potential of 142 mV. A) Which served as the reference electrode? B) What is the molar concentration of penicillin in the sample?
Penicillin heralded the dawn of the antibiotic age when it was discovered in 1928 and is now the most widely used antibiotic in the world. A membrane electrode was developed for the quantitative analysis of penicillin. The table above shows the data which were collected using a set of penicillin standards against saturated calomel electrode. An unknown sample produced a potential of 142 mV. A) Which served as the reference electrode? B) What is the molar concentration of penicillin in the sample?
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
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Penicillin heralded the dawn of the antibiotic age when it was discovered in 1928 and is now the most widely used antibiotic in the world. A membrane electrode was developed for the quantitative analysis of penicillin. The table above shows the data which were collected using a set of penicillin standards against saturated calomel electrode. An unknown sample produced a potential of 142 mV.
A) Which served as the reference electrode?
B) What is the molar concentration of penicillin in the sample?
![[penicillin] (M) potential (mV)
1.0 × 10-2
220
2.0 × 10-3
204
1.0 x 10-3
190
2.0 × 104
153
1.0 × 104
135
1.0 × 10-5
96
1.0 × 10-6
80](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6ad47ee7-7b48-4f49-967d-46c2c6cbcc0b%2F2b89e104-4637-4f4e-b3f9-4f8b5a6974d0%2F0p0pmb_processed.png&w=3840&q=75)
Transcribed Image Text:[penicillin] (M) potential (mV)
1.0 × 10-2
220
2.0 × 10-3
204
1.0 x 10-3
190
2.0 × 104
153
1.0 × 104
135
1.0 × 10-5
96
1.0 × 10-6
80
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