Are organic liquid's lighter than water?
Answer:
Not necessarily.
Take examples of following :
Formic acidH-C(=O)OH 1.21 g/ml
Dimethyl sulfoxide (DMSO)CH3-S(=O)-CH3 1.092 g/ml
1,4-Dioxane/-CH2-CH2-O-CH2-CH2... 1.033 g/ml
Dichloromethane (DCM)CH2Cl2 1.326 g/ml
ChloroformCHCl3 1.498 g/ml
Most are. The density (or specific gravity, depending on what context you're looking at the chemical in) will tell you. Density less than one? It'll float. Density greater than one? It'll sink.
Most are, although there are exeptions!
not all. but most are. you have to look up it's density, if it's density is bigger than water's, then chances are it will sink when mixed with water. this is assuming that they are both different phases (i.e. they do not mix)
Hydrocarbons or with oxygen are generally less dense than that of water (glacial acetic acid at 1.049 g/cm^3), halocarbons are generally denser.
There are some that are and there are some that are not. It all depends on the density of the organic liquid
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