The standardization of an acid might also be carried out using a solution of a b
ID: 902378 • Letter: T
Question
The standardization of an acid might also be carried out using a solution of a base with known concentration. For example, it is found that 37.60 ml of 0.210 M NaOH are required to neutralize 25.05 ml of H2SO4 solution in a titration experiment. Calculate the molarity and normality of the H2SO4 solution.In the example given above, the amount of acid to be titrated has to be delivered by a pipet so that its volume is accurately known. However, the solution of the acid is often diluted to facilitate the titration process. Explain why additional de-ionized water might be added without affecting the results of the titration.Explanation / Answer
H2SO4 + 2NaOH -----> Na2SO4 + 2H2O
M1V1/n1 = M2V2/n2
n1 = 2 mole NaOH , n2 = 1 mol H2SO4
0.21*37.6 / 2 = 25.05*M2/1
M2 = 0.158 M = molarity Of H2SO4
nOrmality of H2SO4 = M2 *z
z = 2 for H2SO4
NOrmality of H2SO4 = 0.158*2 = 0.316 N
addition of water is to make convinient to carry the reaction easily.so that
the reaction can be finished in stipulated time accurately.