Skip to main content

LATEST POST

MATHS TALENT TEST SCORES RELEASED OVERALLS

Post a Comment

GALVANIC CELL




  • a galvanic cell is used to generate electricity through chemical reactions. daniel cell is the example of the galvanic cell.
  • the cell which is used for the electrolysis process is called a galvanic cell.
  • voltaic, electrochemical cell, etc,. these are other names of a galvanic cell.

coming to the construction of a galvanic cell;


the galvanic cell consists of two subcells,

one with the zinc electrode in ZnSo4, another is with the cOpper electrode in CuSo4.

both the cells are connected with a salt bridge, the salt bridge consists of agar agar gel saturated with the KCl or kNO3 or NH4NO3.

the purpose of the salt bridge is to prevent the accumulation of charge around the electrodes and also maintains the neutrality of the solution.
it allows the current by completing the circuit.



the zinc electrode is the anode(-) and the copper electrode is the cathode(+).
the oxidation reaction is taking place at the anode which causes the zinc electrons to move to the copper electrode. these electrons moved through the electric wire connected with both electrodes.the reduction reaction takes place at the copper electrode.

the reaction in terms of chemical formulas:


both the reactions are combined and as we called as like redox reaction.

note:

oxidation is the process of losing the electrons according to the chemistry dictionary.
the reduction in the process of accepting the electrons according to the chemistry dictionary.
the large potential difference occurs at the anodic metal.


THE EMF(electromotive force) OF A CELL:


READ THIS ARTICALES

THERMODYNAMIC LAWS

 HELLO ALL, TODAY I WANT TO EXPLAIN ABOUT THE THERMODYNAMIC LAWS thermodynamic laws are : 1. first law: it states that energy neither be created nor be destroyed, it always changes one form to another form. 2. second law: it states that energy can change the position of any object but the state of energy is potentially reduced comparing to the initial state. 3. third law: it states that the thermal energy per unit temperature of a system approaches a constant value as the temperature absolute zero. zeroth law: if two systems are in thermal equilibrium with the third system then these three are also in thermal equilibrium.
4 comments
Read more

THE INVENTIONS OF SCIENTISTS AND THE PHYSICAL QUANTITES

 Ok guys, these are the inventions and scientific names which changes the world like this:  tuning Fork invented by the conig. The sound was recorded and reproduced for the first time by Edison next. The first law of thermodynamics was introduced by the Joul. Weber scientists introduced the molecular theory of magnetism. And this theory of magnetism improved by the eving. Scientists coulomb invented the law of magnetic forces. Bennett invented the gold-leaf electroscope. Michael Faraday introduced electrolysis. The first theory of Hanson oerested is invented by a wire carrying current behaves like a magnet. E Goldstein proposed the positive rays. JJ Thomson proposed the cathode rays. Proton was discovered by  Rutherford. Neutron was discovered by James Chadwick. Discovery of electrons by millicon. X-rays  invented by rontgen. Artificial radioactivity was discovered by Joliot and iren curie. Artificial transmutation was introduced by Rutherford. Nuclear fission ...
2 comments
Read more