..S̘͖͚̱͈̟̖̣ͩͨ̅͑̑͋͆a̸̢̙̙̗̬̳̳ͩͥͨ̔͋m̸̖̼̹̦͍̙͕̝̬̭̳͠ͅi̥̦͉̟͖͙̪̳͎̟̜̳͎ͪ̽ͣ̉̾̋ͥ̎́̐ͫ̌͘͟r̸̙̥̜̺̼̱̩͍͉͙͕̍̐ͮ̏̒.. • 1556 Reads
INTRODUCTIONElectronic theory of valency was given by Gilbert N. Lewis and Walther Kossel. This theory of valency explains the main cause of chemical combination and combining capacity of different elements on the basis of number of electrons present in the outermost orbit and tendency to lose or gain the electron. The terms ...
Cyrus Roy • 294 Reads
Before understanding about collision theory, we need to learn as to how chemical reactions take place. We know that for a chemical change to occur, the breaking of pre-existing bonds and the formation of new bonds is required. It is sure that the breaking of bonds should take place by the collision of molecules. The theory di...
Bipin Karki • 532 Reads
Definition.Hybridization simply is the intermixing of atomic orbitals.In other words, the process of mixing of orbitals of an atom of nearly equal energy giving rise to entirely new orbitals equal to in number to the mixing orbitals and having identical shape and same energy is called hybridization.Characteristics.The number ...
Those solutions which are standardized by the titration with the primary standard solution are called a secondary standard solution.
The examples of the secondary standard solution are:
When, Ionic Product > Solubility product, precipitation occurs.
Riemann's green is a green pigment ZnO.CoO, which is obtained by heating a mixture of zinc oxide and cobalt nitrate or by the reaction of cobalt nitrate with either or zinc sulphate.
Sigma bond is formed due to the overlapping of orbitals along their intermolecular axis. This leads to the effective overlapping and high electron density along intermolecular axis.
On the other hand, a pi bond is formed due to the sideways overlapping of orbitals. This side-ways overlap is partial and results in low electron density in intermolecular axis.
This is why, a sigma bond is stronger than pi bond.
pH of water at 24°c is 7. What effect does increase in temperature results in pH of water?
1)pH will be more than 7
2) pH will be less than 7
3) pH will be equal to 7
4) can't be determined
Option 2 is correct ans .
Dissociation of water is an endothermic reversible reaction.
When temperature is increased , for an endothermic reaction in equilibrium , it shifts the equilibrium to forward direction i.e. more product is formed which in this case means : more water is dissociated ( more H+ concentration ) is obtained . Ph= negative logarithm of H+ concentration so, more H+ concentration means, lesser Ph. so , whole ph range gets changed when temperature is increased i.e at that time, our neutral point is lesser than 7 but, still water is neutral !