POTENSIOMETRIK TEST
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Questions and Answers

1.tekshiriladigan eritm aning elektrod potensialini o'lchashga asoslangan usul qaysi?

  • potensiometriya (correct)
  • polyarograafiya
  • konduktometriya
  • kulonometriya

    • Potensiometrik va boshqa asbobli (instrumental) titrlash usullarining vizual usullarga ko'ra afzalliklari?

  • aniqlashning sezuvchanligi ancha yuqori bo’ladi
  • loyqa va rangli eritmalar ham osongina titrlanadi;
  • muayyan sharoit yaratilganda eritmada boigan bir necha modda aralashmasi tabaqalab titrlanadi
  • hamma javob to`g`ri (correct)

    • 1889-yilda qaysi olim elektrod potensialining eritmadagi moddalar konsentratsiyasiga bogliqligining termodinamik mohiyatini isbotladi.

  • Volta
  • Amper
  • V.Nernst (correct)
  • Blek

    • Potensiometriyada ishlatiladigan elektrodlar qaysilar?

    <p>indikator va taqqoslash elektrodlari</p> Signup and view all the answers

    Potensiom etriyada titrlashning oxirgi nuqtasini topish uchun, qanday usullar ishlatiladi?

    <p>a va b</p> Signup and view all the answers

    …. potensiometrik tahlilning istiqbolli usullaridan biri bo'lib, uning asosiy vazifasi turli kation va anionlar uchun selektiv — qaytar elektrod yaratish, ularni qo'llash va o'rganishdan iboratdir.

    <p>ionometriya</p> Signup and view all the answers

    …. potensiometriya oksidlanish-qaytarilish potensialini, vodorod va boshqa ionlar aktivligini (ionometriya), turli xil fizik-kimyoviy konstantalami aniqlash uchun ishlatiladi.

    <p>bevosita</p> Signup and view all the answers

    Vodorod elektrodi ning potensiali shartli ravishda istalgan haroratda ham nechaga teng deb olingan

    <p>0</p> Signup and view all the answers

    …. doimiylik darajasi yuqori, elektrodning o'lchami kichik, suvda va suvsiz eritmalarda ham ishlatilishi mumkin.

    <p>kumush xloridli elektrod</p> Signup and view all the answers

    potensiometriyada ishlatiladigan Indikator elektrodlar tekshiriladigan eritm aning …o‘lchash uchun xizmat qiladi

    <p>elektrod potensialini</p> Signup and view all the answers

    Study Notes

    Potentiometry

    • The method based on measuring the electrode potential of a solution is potentiometric titration.
    • Advantages of potentiometric and instrumental titration methods over visual methods include higher accuracy and precision.

    History of Potentiometry

    • In 1889, a scientist proved the thermodynamic principle of the dependence of electrode potential on the concentration of substances in a solution.

    Electrodes in Potentiometry

    • The electrodes used in potentiometry are selective, i.e., they respond to specific ions or molecules.

    End-point Detection in Potentiometric Titration

    • Methods used to determine the end-point of titration in potensiometry include finding the equilibrium point, where the potential of the indicator electrode remains constant.

    Applications of Potentiometry

    • Potentiometry is used to measure oxidation-reduction potentials, hydrogen ion activity (ionometry), and various physical-chemical constants.
    • The method is used to study the activity of ions, including hydrogen ions, at different temperatures.

    Characteristics of Hydrogen Electrodes

    • The potential of a hydrogen electrode is virtually constant at any temperature, making it a reliable and versatile electrode.
    • Hydrogen electrodes have high sensitivity, small size, and can be used in both aqueous and non-aqueous solutions.

    Indicator Electrodes in Potentiometry

    • Indicator electrodes are used to measure the electrode potential of a solution, making it possible to detect changes in the solution's composition during titration.

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    Description

    This quiz covers the methods used to measure the electrode potential, an essential concept in electrochemistry. Test your knowledge of the different techniques and principles involved in electrode potential measurement. From Nernst equation to potentiometry, gauge your understanding of these fundamental concepts.

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