Logarithmic equation in chemistry

Question

Hi!

If i have boric solution (M_vb) and it contains (p%) of boric acid. How much i have to add boric acid (X_b) so that the solution have (P%) of boric acid?

Only using these letters to make an logarithmic equation. How is this solved?

Answer 1

Lilly,

Lacking some data. Even if Mvb is molarity and p% is wt/volume basis, still don't have critical data for P% solution, namely density. Could look up in CRC, but not a general formula! Logarithmic equation no sense in this problem context. Cheers,