Sunday, 25 September 2016

What is Wet Chemistry


What is Wet Chemistry ?

Wet Chemistry  is a branch of chemistry which deals with the study of and testing of chemicals in liquid state. Wetchemistry is also known as Bench Chemistry as many wet chemical methods are performed on chemistry laboratory benches.

Saturday, 24 September 2016

What is Normality ?

What is Normality ?

 Normality is the ratio of gram equivalent weight to volume of solution in liter
where gram equivalent is the measure of reactive capacity of molecule consider for normality.

Normality (N) :- 

                                Gram equivalent weight  / Volume of the solution in liter.

Unit =>   N = "eq/L" (equivalent per liter)

Molarity vs Normality
What is Normality

Thursday, 8 September 2016

Aufbau Principle, Pauli Exclusion Principle and Hund’s Rule of Maximum Multiplicity

Aufbau Principle

                              According to this principle in the ground state of the atoms the orbital’s are filled in order of their increasing energies means electrons enter higher energy orbital’s  so order in which orbital’s are filled is 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p.

Pauli Exclusion Principle

·         given by W. Pauli (1926).
·        Two electrons in an atoms can’t have same set of 4-quantum no.
·        Only two electrons may exist in same orbital and these electrons must have opposite spin.

Hund’s Rule of Maximum Multiplicity

·        According to this rule pairing of  electron in the orbital’s belonging to the same sub-shell (p, d or f)
         ·        Does not take place until each orbital belonging to that sub-shell has got one electron each i.e. it is singly occupied.

Sunday, 4 September 2016

Nuclear Chemistry

Nuclear Chemistry

Definition of Nuclear Chemistry- Nuclear chemistry is the branch of chemistry, which deals with the study of changes in the nucleus of an atom, radioactivity and nuclear reactions.

What is Nuclear Chemistry?

Nuclear chemistry is interesting field of chemistry in which we learn how nuclear reactions happens and how different types of changes occurs in nucleus of an atom also we learn about radioactivity and radioactive elements.  

Founder of Nuclear Chemistry

Marie Curie was the founder of the nuclear chemistry.
Marie Curie was a physicist and chemist who lead revolutionary research on radioactivity and she won Nobel Prize in the field of radioactivity

What is radioactive substances?

Substances which emits radiation by there self are known as radioactive substances.

What is radioactivity?

Phenomenon of radioactive substances to emits radiations is known as radioactivity.

What is importance of radioactivity?

Radioactive substances (or radioactive isotopes of elements) are useful in many physical and chemical reactions. Useful in determining complex reaction mechanism. Radioactivity have several applications in different fields of science like chemical science, medical science, agriculture fields, industrial fields etc.


Thursday, 1 September 2016

What is Molality ?

What is Molality? 

It is the ratio of moles of substance to kilogram of solvent.
Where mole is weight in gram divided by molecular weight.
Molality is chemistry terminology.

Molality (m) :- 

                                No. of moles of the solute  Mass of solvent in Kilogram (Kg).
Unit =>   m = Moles/Kg
Molality Chemistry Infographics
What is Molality

YouTube Video on Molality and Molarity

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