Concentration of a solution can be expressed in terms likes molarity, normality, molality, and mole fraction. Molarity and normality are the widely used terms to express the concentration of a solution. Avogadro number of particles is called as one mole.
Step 1 of 2
Consider the following solutions:
Number of species in unit volume in solution X and solution A are equal.
In solution X, there are four species of solute in unit volume. In solution A, there are 4 species of solute, solution B has 8 species of solute and solution C has 2 species of solute.
Step 2 of 2
If the number of moles present in unit volume increases, its concentration increases.
The number of moles of solution A is equal to the number of moles of solution X. Hence, the solution A has same molar concentration as solution X.
Solution B has more number of species than solution X. Hence, the molar concentration of solution B is higher than the solution X. Solution C has less number of moles in unit than solution C. Hence, the molar concentration of solution C is lower than the molar concentration of solution X.