Making Water Less Dense: A Chemistry Challenge

[Edwine]

Hello,

I will be honest and upfront, I am truly no chemist and actually have no clue on what to do..

I am trying to adjust the density of water, making it more dense is easy by just adding several grams of salt.
But now here comes my problem, I need to make water less dense. The density I need is 0,94.
Now I could easly say I can use alcohol and mix it up.

But the fluid should be disposable trough the sewage and not dangerous. I am a little stuck on this...

Thanks in advance.

Edwin

 

[PRDan4th]

If you freeze water you get a density of .92 and mix with water in a slurry of ice/water to get the .94 density.

 

[PRDan4th]

You can create a slurry of any less dense material with water and make it homogeneous (like milk and butterfat). Mud is a mixture of dirt and water with a density of more than 1.0.

 

[scutterbob]

You might also achieve your goal by simple aeration. The air or other gas can lower the effective density of the water.