Answer
Verified
445.8k+ views
Hint: Standard hydrogen electrode is the basis for potential calculation in electrochemistry. The potential value of a standard hydrogen electrode is 0. Identify the atom getting oxidised or reduced to write the cell reaction and then be able to draw the cell diagram.
Complete step by step answer:
Standard Hydrogen Electrode also called as SHE in short is an electrode used for calculating potential value of different atoms/ions as it acts as a basis line in the electrochemical reactivity series.
Standard electrode potential(SHE) is set to be zero at a temperature of 298K. The pressure of the hydrogen gas present in this half-cell equals 1 bar. Platinum is generally used as an electrode in Standard Hydrogen Electrode.
The reaction takes place at redox half-cell of SHE is:
\[2{{H}^{+}}(aq)+2{{e}^{-}}\to {{H}_{2}}(g)\]
Let us now discuss the construction of the SHE.
For this, platinum electrode is generally used which is covered with finely powdered platinum black. A hydrogen blow is required for this.
A solution of acid having ${{\text{H}}^{\text{+}}}$molarity of 1 mole per cubic decimetre is taken in a beaker. The SHE should be properly sealed to prevent the interference of oxygen.
The other half cell of the entire Galvanic cell must be attached to the Standard Hydrogen Electrode through a reservoir in order to create an ionic conductive path.
This can be done through a direct connection, through a narrow tube, or even through the use of salt bridge.
Let us have a look at the diagram of SHE:
Note: The standard condition of this SHE is only attained at a particular temperature and pressure. The temperature of 298K and pressure of 1 bar is required for a Standard Hydrogen Electrode. This is also called as Standard temperature and pressure (STP) which is often used in various chemical reactions and processes to avoid errors in calculation due to external factors.
Complete step by step answer:
Standard Hydrogen Electrode also called as SHE in short is an electrode used for calculating potential value of different atoms/ions as it acts as a basis line in the electrochemical reactivity series.
Standard electrode potential(SHE) is set to be zero at a temperature of 298K. The pressure of the hydrogen gas present in this half-cell equals 1 bar. Platinum is generally used as an electrode in Standard Hydrogen Electrode.
The reaction takes place at redox half-cell of SHE is:
\[2{{H}^{+}}(aq)+2{{e}^{-}}\to {{H}_{2}}(g)\]
Let us now discuss the construction of the SHE.
For this, platinum electrode is generally used which is covered with finely powdered platinum black. A hydrogen blow is required for this.
A solution of acid having ${{\text{H}}^{\text{+}}}$molarity of 1 mole per cubic decimetre is taken in a beaker. The SHE should be properly sealed to prevent the interference of oxygen.
The other half cell of the entire Galvanic cell must be attached to the Standard Hydrogen Electrode through a reservoir in order to create an ionic conductive path.
This can be done through a direct connection, through a narrow tube, or even through the use of salt bridge.
Let us have a look at the diagram of SHE:
Note: The standard condition of this SHE is only attained at a particular temperature and pressure. The temperature of 298K and pressure of 1 bar is required for a Standard Hydrogen Electrode. This is also called as Standard temperature and pressure (STP) which is often used in various chemical reactions and processes to avoid errors in calculation due to external factors.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Which are the Top 10 Largest Countries of the World?
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
How do you graph the function fx 4x class 9 maths CBSE
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Difference Between Plant Cell and Animal Cell
Give 10 examples for herbs , shrubs , climbers , creepers
Write a stanza wise summary of money madness class 11 english CBSE
Change the following sentences into negative and interrogative class 10 english CBSE