What would be the final volume of a diluted solutions that was made by diluting 250 mL a 4.5M solutions of H2SO4 to make a 3.5M solution? How much water would have to be added to reach the final volume?

1 Answer
May 12, 2017

Answer:

You know you should add acid to water.................I get approx., #71*mL#

Explanation:

Normally, we add ACID to WATER. However, the acid is not too concentrated, and so you would get away with reverse addition.

#"Molarity or concentration"="Moles of solute"/"Volume of solution"#

And thus, since #C_1V_1=C_2V_2#........(because the moles of solute was a constant and depends on the initial concentration).

#V_2=(C_1V_1)/C_2=(250*mLxx4.5*mol*L^-1)/(3.5*mol*L^-1)=321.4*mL#

But since #V_1=250*mL#, we need to ADD #71.4*mL# to the initial #250*mL# volume to give the required concentration.