Q. Calculate the molarity and normality of a solution containing 0.5 g of NaOH dissolved in 500 ml. solution-
Solution:
Wt. of NaOH dissolved
Vol. of NaOH solution = 500 ml
Calculation of molarity
0.5 g of NaOH moles of NaOH
Mol. wt. of NaOH = 40]
= 0.0125 mole
Thus 500 ml of the solution contain NaOH = 0.0125 mole
1000 ml of the solution contain
Hence molarity of the solution = 0.025 M
Calculation of normality
Since NaOH is monoacidic;
Eq. wt. of NaOH = Mol. wt. of NaOH =40
0.5 g of NaOH
equivalents = 0.0125 gram equivalents
Thus 500 ml of the solution contain NaOH = 0.0125 g equiv
1000 ml of the solution contain
Hence normality of the solution = 0.025 N
Hence molarity of the solution = 0.025 M
Calculation of normality
Since NaOH is monoacidic;
Eq. wt. of NaOH = Mol. wt. of NaOH =40
0.5 g of NaOH
equivalents = 0.0125 gram equivalents
Thus 500 ml of the solution contain NaOH = 0.0125 g equiv
1000 ml of the solution contain
Hence normality of the solution = 0.025 N