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Electro Chemistry – One Shot Lecture | CHAMPIONS – JEE/NEET CRASH COURSE 2022
Physics Wallah – English
What is an oxidizing agent? – An oxidizing agent is a substance that oxidizes others and gets itself reduced.
What is a reducing agent? – A reducing agent is a substance that reduces others and gets itself oxidized.
What is the oxidation potential of an oxidizing agent? – The oxidation potential of an oxidizing agent is less as it gets reduced.
What is the reduction potential of a reducing agent? – The reduction potential of a reducing agent is less as it gets oxidized.
What factors affect the EMF of a cell? – The factors that affect the EMF of a cell are the nature of the chemical reaction, concentration of reactants and products, pressure of gases, and temperature.
How is the EMF of a cell calculated under SATP conditions? – Under SATP conditions, the EMF of all ions is calculated based on one molar concentration, 298 Kelvin temperature, and one atmosphere pressure.
How is the EMF of a cell calculated using the Nernst equation? – The EMF of a cell can be calculated using the Nernst equation. If the cells are in their standard states, the EMF of the cell can be calculated using the equation: e0 of cell = e0 of cathode – e0 of anode.
What does the positive or negative value of the standard EMF of the cell indicate? – The positive or negative value of the standard EMF of the cell determines whether the reaction is spontaneous or nonspontaneous.
What is the purpose of using a salt bridge in a galvanic cell? – A salt bridge is used to bring electro neutrality to two solutions in a galvanic cell by nullifying their positive and negative charges.
What is the role of the anode in a galvanic cell? – The anode is negatively charged and it is where the oxidation half-reaction occurs in a galvanic cell.
How can you determine the signs of the electrodes in a galvanic cell? – By knowing the sign of one electrode, you can determine the signs of the other three electrodes. In a galvanic cell, the anode is always negatively charged.
How are the signs of the electrodes in an electrolytic cell different from a galvanic cell? – In an electrolytic cell, the signs of the electrodes are opposite to that of a galvanic cell.
What is cell reaction representation?Cell reaction representation involves identifying the oxidation and reduction reactions and then representing the cell.
How do you represent a cell reaction?To represent a cell reaction, you need to identify the oxidation and reduction reactions.
The cell can be represented with the cathode as Cu2+(aq) + 2e- → Cu(s) and the anode as Cl2(g) → 2Cl-(aq) + 2e-.
A salt bridge is also used in the representation.
What happens at the cathode and anode in a cell reaction?The cathode is where reduction takes place.
The anode is where oxidation takes place.
What is a galvanic cell reaction?A galvanic cell reaction is a type of cell reaction where the cathode is where reduction takes place and the anode is where oxidation takes place.
How is a galvanic cell reaction represented?A galvanic cell reaction can be represented by adding the cathode and anode reactions.
For example, in the given galvanic cell reaction, Fe2+(aq) + 2e- → Fe(s) is the cathode reaction, Fe2+(aq) → Fe3+(aq) + e- is the anode reaction, and adding them gives 3Fe2+(aq) + 2Fe3+(aq) → 5Fe(s).
What are oxidizing and reducing agents?Oxidizing agents have a high tendency to lose electrons.
Reducing agents have a high tendency to gain electrons.
Every element has a specific oxidation and reduction potential.
Oxidizing agents oxidize other substances.
Reducing agents reduce other substances.
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