[oh hey something she can actually offer input on SCIENCE]
Trichloromethane...I believe its chemical make-up would indeed cause it to be slightly denser than water. However, I don't know if it would be significant enough that we could tell the difference on this scale, especially with the small amount of liquid we've been given. There is also the weight of the bottles we must consider - it's entirely possible that they differ in mass enough to throw off our calculations.
There may still be a way we can tell if one of them has been tampered with though. Trichloromethane has a much lower freezing and boiling point than water does. Boiling it would be dangerous, but as for freezing...there should be an ice box in the kitchen, is there not? Trichloromethane is not very soluble in water - the water would float on top of it, being the less dense liquid. In other words, if one of these bottles has indeed been diluted with water, we should see a frozen chunk of ice floating on top within half an hour given how small the volume would be.
no subject
Trichloromethane...I believe its chemical make-up would indeed cause it to be slightly denser than water. However, I don't know if it would be significant enough that we could tell the difference on this scale, especially with the small amount of liquid we've been given. There is also the weight of the bottles we must consider - it's entirely possible that they differ in mass enough to throw off our calculations.
There may still be a way we can tell if one of them has been tampered with though. Trichloromethane has a much lower freezing and boiling point than water does. Boiling it would be dangerous, but as for freezing...there should be an ice box in the kitchen, is there not? Trichloromethane is not very soluble in water - the water would float on top of it, being the less dense liquid. In other words, if one of these bottles has indeed been diluted with water, we should see a frozen chunk of ice floating on top within half an hour given how small the volume would be.