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




Thanks to Jon Custer, now you have a full set of densities against mole fractions of chloroform and n-heptane mixtures in [this site](https://materials.springer.com/thermophysical/docs/ve1_c47c91). Just for my curiosity, I have plot the relevant graph:


[![CCl3-heptane densities](https://i.stack.imgur.com/Un1ZJ.png)](https://i.stack.imgur.com/Un1ZJ.png)


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.


I also found a reliable full data set of densities against mole fractions of chloroform and *n*-hexane mixtures as well (Ref.1). Just in case if you want to use hexane instead of heptane, I included that as well:


[![CCl3-hexane densities](https://i.stack.imgur.com/ZuKPb.jpg)](https://i.stack.imgur.com/ZuKPb.jpg)




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**Reference:**


1. Mehdi Hasan, Ujjan B. Kadam, Apoorva P. Hiray, and Arun B. Sawant, "Densities, Viscosities, and Ultrasonic Velocity Studies of Binary Mixtures of Chloroform with Pentan-1-ol, Hexan-1-ol, and Heptan-1-ol at (303.15 and 313.15) K," *J. Chem. Eng. Data* **2006**, *51(2)*, 671–675 (DOI: <https://doi.org/10.1021/je0504459>).


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