What is quinhydrone electrode in chemistry?
The so-called quinhydrone electrode, containing equivalent amounts of p-benzoquinone and hydroquinone, is used to determine hydrogen ion concentrations of unknown solutions. Hydroquinone is used principally as a photographic developing agent.
What is the formula of Quinhydrone?
Quinhydrone
| PubChem CID | 7801 |
|---|---|
| Chemical Safety | Laboratory Chemical Safety Summary (LCSS) Datasheet |
| Molecular Formula | C12H10O4 |
| Synonyms | Quinhydrone 106-34-3 Green hydroquinone p-Benzoquinhydrone Chinhydron More… |
| Molecular Weight | 218.20 |
What is the standard electrode potential of quinhydrone electrode?
“The standard electrode potential of the quinhydrone electrode from 25 to 55”.
Who introduced quinhydrone electrode?
The first work on the use of the quinhydrone electrode in milk was reported by Lester (10). In ten milk samples she found that the quinhydro~e electrode gave slightly lower values than the hydrogen electrode.
What are the advantages of quinhydrone electrode?
The main advantages of the quinhydrone electrode are low internal resistance, rapid response, high accuracy, simplicity, free of errors due to the presence of nonreducing gases, and free of salt errors.
How does quinhydrone electrode work?
The quinhydrone electrode may be used to measure the hydrogen ion concentration (pH) of a solution containing an acidic substance. + 2H+ +2eā. , of hydrogen ions in the solution. The quinhydrone electrode provides an alternative to the most commonly used glass electrode.
What is Quinhydrone used for?
What are the advantages of Quinhydrone electrode?
What are the electrode used in potentiometry?
Calomel and silver/silver-chloride electrodes are commonly used in potentiometric titration. In the case of possible interferences of chlorides (as in determination of halides), a mercurous sulfate electrode may be used.
Is quinhydrone electrode A indicator electrode?
Quinhydrone electrode is an indicator electrode in contact with platinum metal and can be used in acid-base potentiometric titration. At the equivalence point, [A] = [B] and thus, EMF of the cell is dependent on pH.
What are the advantages and disadvantages of quinhydrone electrode?
Ion-Selective Electrodes The main advantages of the quinhydrone electrode are low internal resistance, rapid response, high accuracy, simplicity, free of errors due to the presence of nonreducing gases, and free of salt errors.
Which electrode is used in potentiometer?
What can be measured with a quinhydrone electrode?
The quinhydrone electrode may be used to measure the hydrogen ion concentration ( pH) of a solution containing an acidic substance. A platinum wire electrode is immersed in a saturated aqueous solution of quinhydrone, in which there is the following equilibrium 2 + 2H + +2e ā. , of hydrogen ions in the solution.
What happens when Quinhydrone is added to a solution?
When quinhydrone is added to a solution, the concentration of hydrogen ions will, in accordance with the above equilibrium, determine the potential developed at a platinium electrode (which can be measured by reference to a standard half-cell) and this enables the pH of the solution to be calculated.
What kind of electrode is used for hydronium ion?
Two other half-cells that can be used for indicating hydronium ion are the quinhydrone electrode and antimony electrode. Quinhydrone is a molecular species composed of one p -quinone (Q) and one p -hydroquinone (H 2 Q) held together by hydrogen bonding.
What kind of electrode is used in a pH meter?
The quinhydrone electrode is a type of redox electrode which used to measure the hydrogen ion concentration (pH) of a solution in a chemical experiment. It provides an alternative to the commonly used glass electrode in a pH meter.