concentration units
%W/W, %V/V, %W/V, Molarity, Molality, Normality, Mole fraction, Mass percent, PPM, PPB, PPT, PPQ(PPN)
In this post you can find concentration units chemistry. This units are commonly used in calculating concentration of solution. Next post you can show Relations between concentration units.
There are different types of concentration units commonly used given below:
Click on Read more
1) %W/W (mass or weight percent) :-
– The weight percent is defined as the ratio of weight of the solute to total weight of solution.
– %W/W =Weight of Solute
———————— × 100 %
Total Weight of Solution
— symbol :- %W/W
– Unit : No unit
——————————————————–
2) %V/V (volume percent) :-
– It is define as ratio of volume of the Solute to total volume of solution.
– %V/V = volume of Solute
————————– × 100 %
Total Volume of Solution
— symbol :- %V/V
– Unit : No unit
——————————————————–
3) %W/V (weight by volume percent) :-
– It is expressed in ratio of weight of the Solute which is stay in solution to total volume of Solution.
– %W/V = Weight of solute
———————— × 100 %
Total Volume of Solution
— symbol :- %W/V
– Unit : No unit
——————————————————–
4) Normality(N) :-
– It is defined as the number of gram equivalents of solute dissolved in one litre of solution.
– Normality (N)
N = Gram equivalent of solute
–————————————
Volume of Solution in litre
– Equivalent weight of Solute
= Atomic weight of Solute
————————————
Valency of Solute
– For example, for H2SO4
= 96/2
= 49
Valency of H2SO4 (H+2 SO4-2) = 2
– Gram equivalent of solute
= weight of solute in gram
—————————————
Equivalent weight of Solute
— symbol :- N
– Unit : :
SI unit- mole/equivalent or N
CGS unit :- mole/gramme
——————————————————–
5) Molarity(M) :-
– It is defined as the number of gram moles of the solute dissolved in one litre of solution.
– Molarity (M)
M = Moles of solute
–—————————–
Volume of Solution in litre
— symbol :- M
– Unit :
SI unit :- mole/litre or M
MKS unit :- mol/dm-3
——————————————————–
6) Molality :-
– It is defined as the number of gram moles of the solute dissolved in one litre of solution.
– Molality (m)
m = Moles of solute
–—————————–——
Volume of Solution in litre
— symbol :- m
– Unit :
SI unit :- mole/kilogramme or m
CGS unit :- mole/gramme
——————————————————–
7) Formality :-
It is defined as the number of formula mass of any solute dissolved in 1 litter of solution.
F= Number of formula weight of
Solute
–—————————–——
Volume of Solution in litre
— symbol :- F
– Unit :
SI unit :- mole/m³ or F or mole
CGS unit :N/A
——————————————————–
8) Mole fraction:-
– It is defined as the ratio of moles of individual components to the total moles of the system.
– If Solution contain components A and B then mole fraction of component A is :
– Mole fraction of compo. A (XA)
XA = Moles of A
––————————
Moles of A + Moles of B
X = Moles of solute
––————————
Total moles of solution
symbol :- X
– Unit : No unit
——————————————————–
9) Mass fraction:-
– It is defined as the ratio of mass of individual components to the total mass of the system.
– If Solution contain components A and B then mole fraction of component A is :
– Mass fraction of compo. A (MA)
MA = Mass of A
––—————————
Total mass of system
M = Mass of solute
––————————
Total mass of solution
symbol :- M
– Unit : No unit
——————————————————–
10) Mole percent :-
– It is expressed in percentage of mole fraction.
– Mole percent of A
XA% = Moles of A
––———————— × 100%
Moles of A + Moles of B
— symbol :- X%
– Unit : No unit
——————————————————–
11) Mass percent :-
– It is expressed in percentage of mass fraction.
– Mass percent of A
mA% = Mass of A
––———————— × 100%
Total mass of solution
— symbol :- m%
– Unit : No unit
——————————————————–
12) PPM ( parts per million ) :-
– It is expressed as parts per million.
– PPM (parts per million)
= Weight of solute or volume of solute
——————————————×106
weight of solution or volume of solution
— symbol :- PPM
– Unit : PPM
——————————————————–
13) PPB ( parts per billion ) :-
– It is expressed as parts per billion.
– PPB (parts per billion)
= weight of solute or volume of solute
——————————————×109
weight of solution or volume of solution
— symbol :- PPB
– Unit : PPB
——————————————————–
14) PPT ( parts per trillion ) :-
t is expressed as parts per trillion.
– PPT (parts per trillion)
= weight of solute or volume of solute
—————————————×1012
weight of solution or volume of solution
— symbol :- PPT
– Unit : PPT
——————————————————–
15) PPQ (parts per quadrillion ) :-
– It is expressed as parts per quadrillion.
– PPQ (parts per quadrillion)
= weight of solute or volume of solute
—————————————×106
weight of solution or volume of solution
— symbol :- PPQ
– Unit : PPQ
——————————————————–
Read this article : Relations between concentration units
Note :
If you want to pdf of this topic then comment on this post or contact us. Write message "I need pdf of units of concentration".
If you see any error, please feel free to contact us or comment
Thanks for read article
Stay home and keep studying from home
0 Comments