How much 0.5 M HCl can be made by diluting 250 mL of a 10 M HCl?

1 Answer
Mar 19, 2018

I am glad you propose adding acid to water....I think we can make #5*L# of acid of the required concentration...

Explanation:

I am glad you propose adding acid to water....because if you spit in acid it spits back... I kid you not.

Anyway, we go back to old definition of concentration...

#"concentration"="moles of solute"/"volume of solution..."#

And so in the initial volume of conc. acid... we got...

#250*mLxx10^-3*L*mL^-1xx10.0*mol*L^-1=2.50*mol#

We want to make #0.50*mol*L^-1# #HCl#...

And so #"volume"=(2.50*mol)/(0.50*mol*L^-1)=5.0*L#