Question:
The strength of an aqueous $\mathrm{NaOH}$ solution is most accurately determined by titrating: (Note: consider that an appropriate indicator is used)
Correct Option: , 2
Solution:
Oxalic acid is a primary standard solution whereas $\mathrm{H}_{2} \mathrm{SO}_{4}$ is a secondary standard solution. So it does not matter whether oxalic acid is taken in a burette or in conical flask. Therefore accurate measurement of concentration by titration depends on the nature of the solution.