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Calie006

Help on solubility

Which substances are soluble in hexane C6H14?

C8H18

H20

CH4

I have no idea how to do this... Help please

 

Thanks a lot

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Hiya!

 

C8H18 is octane and so is non-polar

H2O is polar, because of the shape of the molecule and hydrogen bonding

CH4 is methane and so is non-polar

 

Hexane itself is non-polar. Remember, for solubility, we use the rule 'like dissolves like'. So, octane and methane are soluble in hexane, whereas water isn't.

 

Hope this helped :)

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Hexane, methane and octane are members of the alkane homologous series. The alkanes are non-polar molecules. Non-polar substances are soluble in non-polar solvents and polar substances are soluble in polar solvents.

Hence the phrase 'like dissolves like'.

Methane and octane are both soluble in hexane as they are all non-polar substances.

Water is a polar solvent and will dissolve polar substances such as ethanol.

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