Question

which pair of substances are most likely to obey Raoult's Law?

C5H12 and C6H14
H3PO4 and H20
C4H9COOH and C5H12
C5H12 and H20
C4H9COOH and H20

How do I go about figuring this out? What should I be comparing, differences in molar masses, polarity, etc...?

bobpursley
I would choose substances that are alike in ability to dissove miscibily.

Pentane and water is no..for example.

Butanoic acid and pentane is another not likely to dissolve.

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how do i find which substances are most likely to obey raoult's law? Select the pair of substances in which the one with the higher vapor pressure at a given temperature... Choose the pair of substances that are most likely to form a homogeneous solution. N2O4 and NH4... The compound 2,4-dimethylpentane has the molecular formula a. C8H18 b. C7H16 c. C5H12 d. C6H14.