Question Four a) The concentration of As(III) in water can be determined by differential pulse polarography in IM HCI. The initial potential is set to-0.1 V versus the SCE, and is scanned toward more negative potentials at a rate of 5 mV/s. Reduction of As(III) to As(0) occurs at a potential of approximately -0.44 V versus the SCE. The peak currents, corrected for the residual current, for a set of standard solutions are shown in the following table. ip (µA) [As(III)] M 1.0 x 10-6 0.298 3.0 x 10-6 0.947 6.0 x 10-6 1.83 9.0 x 10-6 2.72 i. Plot the graph of [As (III)] vs ip and use linear regression to obtain the best fit line for the data obtained ii. What is the calibration curve equation. iii. What is the concentration of As (III) in a sample of water if the peak current under the same conditions is 1.37 µA? b) What is the principle of couloemetry
Question Four a) The concentration of As(III) in water can be determined by differential pulse polarography in IM HCI. The initial potential is set to-0.1 V versus the SCE, and is scanned toward more negative potentials at a rate of 5 mV/s. Reduction of As(III) to As(0) occurs at a potential of approximately -0.44 V versus the SCE. The peak currents, corrected for the residual current, for a set of standard solutions are shown in the following table. ip (µA) [As(III)] M 1.0 x 10-6 0.298 3.0 x 10-6 0.947 6.0 x 10-6 1.83 9.0 x 10-6 2.72 i. Plot the graph of [As (III)] vs ip and use linear regression to obtain the best fit line for the data obtained ii. What is the calibration curve equation. iii. What is the concentration of As (III) in a sample of water if the peak current under the same conditions is 1.37 µA? b) What is the principle of couloemetry
Chapter11: Dynamic Electrochemistry
Section: Chapter Questions
Problem 10P
Related questions
Question
100%
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Recommended textbooks for you
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Chemistry: Principles and Practice
Chemistry
ISBN:
9780534420123
Author:
Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:
Cengage Learning