What You Will Learn!
- The students will have a clear vision about the Oxidation Reactions.
- The students will be able to differentiate between oxidizing agent and Reducing agent.
- The students will be able to identify Reduction Reactions.
- The learners will know about Balancing of Equations.
Description
Redox reactions are the chemical reactions in which reduction and oxidation occurs
simultaneously. In straight words addition of oxygen is oxidation and removal of
hydrogen is reduction.
ELECTRONIC CONCEPT OF OXIDATION AND REDUCTION
Oxidation is a process in which an atom or an ion loses one or more electrons.
Reduction is a process in which an atom or an ion gains one or more electrons.
REDOX REACTION
Redox reactions may be regarded as electron transfer reactions in which the electrons
are transferred from one reactant to the other. As the result substance which losses
electrons is called a reducing agent or reductant while another which accepts the
electrons is called an oxidizing agent or oxidant.
REDOX REACTIONS IN AQUEOUS SOLUTION
In aqueous solutions, the spontaneous redox reactions can be carried out directly
as well as indirectly.
Direct Redox Reactions: Redox reactions in which oxidation and reduction takes
place in the same vessel are called direct redox reactions. In such reactions, the
transfer of electrons from reductant to oxidant occurs over a very short distance
(within molecular diameters). For example, if a zinc rod is placed in a solution of
copper sulphate in a beaker, a spontaneous reaction occurs and following changes
will be observed.
Observations for redox reaction occurring in a beaker
Zinc rod starts dissolving and loses its mass gradually.
The blue color of the solution starts fading.
Copper metal either starts settling at the bottom of the beaker or depositing on the
zinc rod.
The reaction is exothermic i.e., it takes place with the evolution of heat.
The solution remains electrically neutral throughout.
The reaction will not continue indefinitely but stops after some time.
Who Should Attend!
- Biggane and eleventh standard students.
