How do i estimate the density of a solution of two compounds, when im given wt% and the specific gravity?

The only other data you need is the density of water ρw.

Explanation:

We can start by the volume balance

We can replace the volumes with V=M/ρ

If we divide every term by Ms

By definition, wt=Mi/Msol, so we can replace that in the expression

Then we have the expression of the density of the solution

To replace ρ1 and ρ2, you have to multiply the specific gravity of the components and the density of water.

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.