/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 1 Briefly describe or define *(a... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 21: Problem 1

Briefly describe or define *(a) indicator electrode. (b) reference electrode. *(c) electrode of the first kind. (d) electrode of the second kind.

Short Answer

Expert verified
Indicator electrodes measure ion concentration changes. Reference electrodes provide stable potential. Electrode of the first kind involves a direct reaction with ions. Electrode of the second kind incorporates a secondary reaction.

Step by step solution

01

Define Indicator Electrode

**Definition:** An indicator electrode is a type of electrode that responds to changes in the concentration of a specific ion in solution. It is used to measure the potential difference in an electrochemical cell, which is related to the activity or concentration of the ion of interest.
02

Define Reference Electrode

**Definition:** A reference electrode is an electrode with a stable and well-known electrode potential, which serves as a reference point in measuring and comparing other electrode potentials. It is unresponsive to changes in the conditions of the tested solution.
03

Define Electrode of the First Kind

**Definition:** An electrode of the first kind is an electrode whose potential is directly dependent on the concentration or activity of a single chemical species involved in the redox reaction at the electrode surface, such as a metal electrode in contact with its ions in solution.
04

Define Electrode of the Second Kind

**Definition:** An electrode of the second kind is an electrode that responds to the concentration of a specific ion but involves a secondary reaction to stabilize or enhance its response, often including a metal in contact with a sparingly soluble salt and the solution of its ions.

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.

Over 30 million students worldwide already upgrade their learning with 91影视!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Indicator Electrode
Indicator electrodes play a crucial role in electrochemistry by acting as sensors that respond specifically to a particular ion in a solution. They measure the potential difference based on the change in concentration of that ion.
This potential difference is directly related to the ion's concentration, allowing quantitative analysis in the solution. Some common examples are glass electrodes used in pH meters.
  • Directly measures potential difference.
  • Responsive to ion concentration changes.
  • Used for specific ion detection and measurement.
This tool's primary use is in applications where organisms' or compounds' concentrations need to be precisely monitored. In academic settings, these electrodes are central to understanding how different ions behave under energy changes.
Reference Electrode
Reference electrodes provide a stable benchmark in electrochemical cells with their stable and invariant potential. They are essential for the consistent measurement and comparison of potentials in other electrodes. Reference electrodes do not respond to changes in the solution environment, which makes them a reliable baseline.
  • Stable and known potential.
  • Acts as a constant against which other potentials are measured.
  • Unaffected by changes in solution conditions.
Common reference electrodes include the standard hydrogen electrode, the calomel electrode, and the silver/silver chloride electrode. They are indispensable in experiments and practical applications requiring precise electrochemical measurements.
Electrode of the First Kind
Electrodes of the first kind rely on the direct interaction between a metal and its ions in a solution. The electrode potential is directly dependent on the concentration of these ions at the interface. These electrodes help in understanding the basic metal-ion equilibrium.
  • Direct metal-ion reaction.
  • Potential depends on single chemical species.
  • Metal electrodes like Ag/Ag+ are typical examples.
These electrodes serve in fundamental electrochemical studies, allowing scientists to predict and measure simple redox reactions involving metals and their ions.
Electrode of the Second Kind
Electrodes of the second kind are complex in how they interact with the solution. They involve a secondary reaction to improve or stabilize the response and can measure ion concentrations effectively, typically involving metal in contact with a sparingly soluble salt.
  • Secondary reactions enhance sensitivity.
  • Reaction includes sparingly soluble salts.
  • Useful for specific, stabilized ion measurements.
This type of electrode is useful for detecting ions like chloride using a silver electrode coated with silver chloride. They enhance the precision in measuring specific ions, especially when their concentration is crucial in maintaining equilibrium in the solution.

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

List several sources of uncertainty in \(\mathrm{pH}\) measurements with a glass/calomel electrode system.

Give several advantages of a potentiometric titration over a direct potentiometric measurement.

Briefly describe or define *(a) liquid-junction potential. (b) boundary potential. *(c) asymmetry potential. (d) combination electrode.

A 0.4021-g sample of a purified organic acid was dissolved in water and titrated potentiometrically. A plot of the data revealed a single end point after \(18.62 \mathrm{~mL}\). of \(0.1243 \mathrm{M} \mathrm{NaOH}\) had been introduced. Calculate the molecular mass of the acid.

Calculate the potential of a silver indicator electrode versus the standard calomel electrode after the addition of \(5.00,15.00,25.00,30.00,35.00,39.00\), \(39.50,36.60,39.70,39.80,39.90,39.95,39.99\), \(40.00,40.01,40.05,40.10,40.20,40.30,40.40\), \(40.50,41.00,45.00,50.00,55.00\), and \(70.00 \mathrm{~mL}\) of \(0.1000 \mathrm{M} \mathrm{AgNO}_{5}\) to \(50.00 \mathrm{~mL}\) of \(0.0800 \mathrm{M}\) \(\mathrm{KSeCN}\). Construct a titration curve and a first and second derivative plot from these data. ( \(K_{\text {ap }}\) for \(\left.A \mathrm{gSeCN}=4.20 \times 10^{-16} .\right)\)
See all solutions

Recommended explanations on Chemistry Textbooks

Chemistry Branches

Read Explanation

Organic Chemistry

Read Explanation

Kinetics

Read Explanation

Ionic and Molecular Compounds

Read Explanation

Nuclear Chemistry

Read Explanation

Chemical Reactions

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.