Question

Can any one plzzzzzzz give all the important formula from

" SOME BASIC CONCEPTS Of CHEMISTRY" ????

{ mainly related to concentration terms like
◼ MOLALITY to MOLARITY
◼MOLE FRACTION In Terms of w/v% , w/w%
◼and all other important formulas.........}

(plzzzzz^infinite)☺☺

Answer 1

Important formulas :

1. Molecular formula =n*Empirical formula
[Here, n= no. of moles ]
2. n= W/M [Here, n=mole, W= given mass,
M= molar mass]
3.Mass % of A= WA/WA+WB * 100
[ A= solvent, WA= given mass of A, WB=given mass of solute (A = solvent and B= solute) ]

Mass % of B= WB/WA+WB * 100

4.Volume % of A= VA/VA+VB*100
volume % of B = VB/VA+VA*100
[VA= volume of solvent, VB = volume of solute ]

5. BY MASS

PPm of A = WA/WA+WB * 1000000
PPm of B = WB/WA+WB * 100000
[ppm = parts per million]

BY VOLUME

ppm of A = VA/VA+VB * 1000000
ppm of B = VB/VA+VB * 1000000

6. Mole fraction = mole of one component/
mole of all component

xA = nA/nA+nB (for mole fraction of solvent)
xB =nB/nA+nB (for mole fraction of solute)

7. Molarity(M) = no. of mole of solute/ volume of solution in litre
M = nB/V(litre) mol/L

M = density * %* 10/MB (when density is given, % =100)

8. Molality(m) = no. of mole of solute / weight of solvent in kg
m = nB/WA(kg) mol/kg

9. Relationship between Molarity and Molality

density /M = 1/m+MB/1000