Calculation of Molality and Mole Fraction using percentage by weight and Relation between Molarity, density & percentage by weight and Concept of Dilution and Sampling

Strength and its relation with Molarity and Normaility, Relation between Molarity, Molality and density, Relation between Molality and Mole Fraction and Percentage by weight and Percentage by volume

Relation between molarity and molality|Mole fraction |Problem on mixing of solution

Molality|| PPM|| PPB||Relation between Molality and Molarity|| Relation between Molality and Mole Fraction|| Relation between Molarity and Percentage W/W||Class Illustrations with Short Tricks

Molality|Relation Between Molarity And Molality|Mole Fraction|Summary

Calculate the concentration (in percentage by weight) of a solution obtained by mixing 300 g 25% by weight solution of NH_(4)Cl and 150 g of 40% by weight solution of NH_(4)Cl

Normality, Formality|| Percentage by Weight||Mole Fraction||Molality

Assertion: For calculating the molality or the mole fraction of solute, if the molarity is known, it is necessary to know the density of the solution. Reason: Molality, molarity and the mole fraction of solute can be calculated from the weight percentage and the density of the solution.

The concentrations of soluitons can be expressed in number of ways , viz : mass fraction of solute (or mass percent), Molar concentration (Molarity ) and Molal concentration (molality). These terms are known as concentration terms and also they are related with each otehr i.e., knowing one concentration terms for the solution, we can find other concentration terms also. the definition of different cencentration terms are given below: Molarity : It is number of moles of solute present in one litre of the solution. Molality : It is the number of moles of solute present in one kg of the solvent. Mole fraction =("Mole of solute")/("Moles of solute" + "Moles of solvent") If molality of the solution is given as a, then mole fraction of the solute can be calculated by Mole Fraction =(a)/(a+(100)/(M_("solvent"))),=(axxM_("solvent"))/((a xx M_("solvent")+1000)0 where a=molality and M_("solvent") =Molar mass of solvent We can change : Mole fraction hArr Molality hArr Molarity Percentage (weight/vol) of NaCl persent in the solution is :

Define the following terms : a. Mole fraction b. Molality c. Molarity d. Mass percentage.