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Why pH electrode is dipped in saturated KOH solution?
The pH electrode is dipped in saturated KOH solution to create a stable reference potential. The presence of potassium ions in the solution helps maintain a stable potential between the reference electrode and the sensing electrode, enabling accurate pH measurements.
What type of electrodes are used in potentiometric titration?
Potentiometric titration is a method to detect potential difference between the indicator electrode and reference electrode and thus determine concentration of chemical component, which reacts with reagent added to a solution potentially in equilibrium at the beginning.The popularly used reference electrode is either silver-silver chloride or mercury sulfate electrode, and the indicator electrode is generally made of glass electrode, platinum electrode and silver electrode or ion selective electrode.
Describe the construction of calomel electrode?
It consists of tube in the bottom of which is a layer of mercury ,over which is placed a paste of Hg+HgCl2.The remaining portion of cell is filled with a solution of normal or decinormal or saturated solution of KCl. a platinum wire dipping into the mercury layer is used for making electrical contact. the side tube is used for electrode is formulated as;Hg,Hg2Cl2,KCl. the electrode can be coupled with the hydrogen electrode of unknown pH.
What is primary standard electrode?
A primary standard electrode is a reference electrode with a known and stable electrochemical potential that is used as a standard for calibrating other electrodes. These electrodes provide a precise and reproducible reference potential for accurate measurements in electrochemical experiments. Examples include the saturated calomel electrode (SCE) and the silver/silver chloride electrode.
Scientific Name of Silver Chloride?
The scientific name for silver chloride is AgCl. It is a white crystalline solid compound that is commonly used in photography and as a reference electrode in electrochemical studies.
Can the saturated calomel reference electrode be used in strong alkaline media such as 2-5 N KOH solution?
No, the saturated calomel reference electrode is not suitable for use in strong alkaline solutions like 2-5 N KOH. The high pH environment can damage the electrode and affect its performance. It is better to use a reference electrode designed specifically for use in alkaline media, such as a silver/silver chloride electrode.
Why do chloride ions move towards the positive electrode?
Chloride ions are negatively charged and are attracted to the positively charged electrode due to electrostatic forces. This attraction causes the chloride ions to move towards the positive electrode during electrolysis.
What is a good substitute for a saturated calomel electrode?
For example, the silver/silver chloride electrode (without mercury).
What is silver chloride used for?
Silver chloride is commonly used in photography as a light-sensitive chemical in photographic emulsions. It is also used in the production of electrochemical cells and as a reference electrode in electrochemical experiments. Additionally, silver chloride is used in the manufacturing of specialty glasses and ceramics.
Why chlorine gas forms at the positive electrode?
At the positive electrode electrons are removed from the solution. If chloride ions (Cl-) are present the will each lose and electron to form chlorine atoms, which then bond together to from Cl2 molecules, which is chlorine gas. Chlorine is extremely toxic, which is why you shouldn't use table salt (sodium chloride) as an electrolyte.
When electric current is passed through molten sodium chloride sodium is deposited on positive or negative electrode?
The metal plates out on the negative electrode, which provides the electrons needed to neutralize its positive ions.
Can ammonium chloride be used for fermentation?
Ammonium chloride can be used as fermentation activator for the wines preparation.
