Will Mixture Ratio Change in a Tank?

[John Drew]

My wife is wanting to place an empty alcohol bottle filled with Dawn in the toilet tank. Have a 1//16 hole drilled 3 inches from the bottom so the fluid will come out when flushed and the water level gets lower than the hole. The Dawn will stop coming out once the water refills above the hole. My question is will the solution in the bottle continue to be diluted by the water in the tank overnight. Or if we went on vacation would the two mix together and have the same mixture ratio?

 

[BillTre]

The Dawn will continue to come out based on diffusion.
It won't come out as fast as when the bottle was in the draining situation, which involves moving volumes of water.

Its like an insulation situation:
Heat can get through insulation at a low rate and will eventually reach an equilibrium.
However, if say you open a cooler's lid, the change will be much faster.