Question

25 ml of Hydrochloric acid is mixed with 275 g of water. Calculate (a)the mass percent of hydrochloric acid. (b) the Volume percent of hydrochloric acid. (density of hydrochloric acid is 1.18 g/ml)

Answer 1

Explanation:

Since the concentrated HCl is quite inconvenient and hard to handle it is just impossible to take a small volume properly, this way the direct one-step dilution will not recommended and surely would not result in a correct concentration. The most reliable method is to make a 10x dilution first, then to determine the exact concentration of this stock solution by titrimetry in order calculate the proper volumes for a further 2nd step dilution to approach the correct final result.