How would you identify two unknown liquids which are both colorless & odorless?

Question

is this question need to be placed at chemistry? i think so.

Answer 1

At home? Because in the lab you would do TLC's and if they looked non-polar from that maybe a little GCMS. Then you could see if it forms precipitates with anything. Ohhhh, or do a CHN, elememental analysis. That will tell you what the ration of C, H, and N is. Although I think that only works if you have O's. And if you have an NMR you should probably do one of those, because that will give you tons of info. And there is always IR and UV/Vis.
At home you could do things like, freeze them and record what temperature they are with a thermometer in the middle of an ice cube, boil them and check that temp with a candy thermometer, then look up boiling points and freezing points. That assumes that these are really pure liquids, though, otherwise it won't even be close.Check how much surface tension there is when in a drop, too. If you have some idea what the liquids are it would make it easier, but it's really hard to identify one molecule in the millions out there.
As you can see, this is a very difficult problem. A whole branch of chemistry, analytical, is devoted to it. If you want a guess as to what two odorless, colorless liquids at home are, I would say either 2 kinds of liquor, or liquor and water. Those are pretty common, and they don't usually contain dyes or perfumes.

Answer 2

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RE:
How would you identify two unknown liquids which are both colorless & odorless?
is this question need to be placed at chemistry? i think so.

Answer 3

yes ur right it needs 2 be placed in da chemistry section

so da easiest method to identify these unknown liquids is to use litmus paper which your teacher can provide for you in your lab,

just take the litmus paper and dip it into the liquid and take it out if it is red litmus paper and it turns blue then it is an alkali (also known as a base)
if u took blue litmus paper and it turned red then it is an acid

if no colour changes occur, while using both types of litmus papers, then it is likely that the liquid is water

once you've found out the kind of liquids they are then u got 2 do other tests which i don't remember right now


points to remeber :
water has a pH level of 7
liquids below 7 are acidic (acid type)
liquids above 7 are basic (base type)

Answer 4

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Answer 5

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Besides the aforementioned physical and chemical characteristics (by the way, freezing and boiling points are also very easy to determine and are tabulated in the databases), there are various forms of spectroscopy that could help identifying them, especially if the liquids are not pure compounds.

Answer 6

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Answer 7

Density, boiling point, freezing point, conductivity, miscibility with a variety of polar & nonpolar solvents, flammability, reactivity with various things (acids, bases, organic reagents like 2, 4-dinitrophenol). In short, physical and chemical properties.

Answer 8

Well if the 2 liquids are miscible then it is a difficult task of selecting a suitable solvent that would be miscible with one &
immiscible with other. This can be done chemically, but if they're
immiscible then you can separate them with the difference in their physical constants(M.P./B.P)

Answer 9

it should be placed in chemistry Two unkown liquids which are odourless &colorless can be identified by chemical means

Answer 10

well...if they are colorless and odorless and ur 100% positive that they are different....just combine them with substances that they will react differently due to their properties