Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 17: Q33P (page 430)

Explain what is done in anodic stripping voltammetry. Why is stripping the most sensitive voltammetric technique?

Short Answer

Expert verified

The process of anodic stripping voltammetry follows electro reduction, voltage direction and oxidation. As the analyte is concentrated from a dilute solution therefore, stripping is more effective than the voltammetric technique was given.

Step by step solution

01

Introduction

The process of anodic stripping voltammetry.

- By electro reduction into a thin film of mercury, the analyte is concentrated in stripping.

- While changing the voltage's direction the electroactive species is stripped off from the electrode.

- This leads to oxidation which is proportional to the deposited analyte.

- The effectiveness of stripping is due to the analyte getting concentrated in a dilute solution.

02

 Explanation.

In stripping analysis, analyte from a dilute solution is concentrated at working electrode. The potential becomes more positive because of oxidation, and the peak current measured during oxidation is proportional to the concentration of analyte that was deposited. As the analyte is concentrated from a dilute solution therefore, stripping is more effective than the voltametric technique was given. Analysis is more sensitive towards longer concentration period..

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

The figure shows the behavior of Ptand Ag cathodes at whichreduction ofH3O+toH2(g)occurs. Explain why the two curves arenot superimposed.

Current versus voltage forPtand Agelectrodes in O2 -free, aqueous H2SO4

Adjusted topH3.2.

The chlor-alkali process 54in which seawater is electrolyzed to make CI2 andNaOH, is the second most important commercial electrolysis, behindAIproduction.

Anode: CI-→12CI2+e-

HgCathode:Na++H2O+e-→NaOH+12H2

The Nafion membrane (page 421) used to separate the anode and cathode compartments resists chemical attack. Its anionic side chains permit conduction ofNa+ , but not anions. The cathode compartment contains pure water, and the anode compartment contains seawater from which Ca2+ and Mg2+ have been removed. Explain how the membrane allows NaOH to be formed free ofNaCI.

Electroplating efficiency. 56Nickel was electrolytically plated onto a carbon electrode from a bath containing290g/LNiSO4.6H2O,30g/LB(OH)3androle="math" localid="1654763379590" 8g/LNaClat-1.2VvsAgAgClThe most important side reaction is reduction ofH+toH2.In one experiment, a carbon electrode weighing0.4775gbefore deposition weighedrole="math" localid="1654763622546" 0.4798gafter8.82Chad passed through the circuit. What percentage of the current went into the reactionNi2+2e-→Ni(s)?

A solution of Sn2+is to be electrolyzed to reduce the Sn2+to Sn(s). Calculate the cathode potential (versus S.H.E.) needed to reduce[Sn2+]to1.0×10-8Mif no concentration polarization occurs. What would be the potential versus S.C.E. instead of S.H.E? Would the potential be more positive or more negative if concentration polarization occurred?

(a) Explain the difference between charging current and faradaic current.

(b) What is the purpose of waitingafter a voltage pulse before measuring current in sampled current voltammetry?

(c) Why is square wave voltammetry more sensitive than sampled

current voltammetry?
See all solutions

Recommended explanations on Chemistry Textbooks

Ionic and Molecular Compounds

Read Explanation

Chemistry Branches

Read Explanation

Organic Chemistry

Read Explanation

Kinetics

Read Explanation

Chemical Analysis

Read Explanation

Physical Chemistry

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free