# Any way to predict what quantities of heptane and chloroform will match the density of water?

I am trying to make a solution of heptane and chloroform that matches the density of water.

Is this something which must be done experimentally as it is generally unpredictable? Does a software exist to computationally simulate this?

My end goal is to have a vertical interface rather than a horizontal one and then to make a pickering emulsion.

Thanks

• As a "first shot" prediction, assume density as linear interpolation of solvent densities, according to their mass fraction. If it does not fit, determine the real density (e.g. weighting of measured volume) and use it as the 3rd point for quadratic interpolation to get the water density. Feb 17, 2023 at 14:11
• Feb 17, 2023 at 14:13

The data is given for temperature at $$\pu{25 ^\circ C}$$ and the set is in good agreement $$(R^2 = 0.9994)$$. Since $$x$$ in the equation is the density, and assuming density of water at $$\pu{25 ^\circ C}$$ is $$\pu{1.0 g mL-1}$$, you may get that density by mixing $$(-1.1887 + 3.727 - 1.9736) = 0.5647$$ mole fraction.