The compounds that are soluble in water: Most soluble: CH3CH2CH2OH, and CH3CH2CH2NH2
Least soluble: CH3CH2CH2CH2CH2OH, and CH3CH2CH2CH2CH2NH2
A polar molecule, water also functions as a polar solvent. A chemical species is said to be "polar" if the distribution of positive and negative electrical charges is unbalanced. Atomic nuclei are where the positive charge originates, while electrons are where the negative charge comes from. Polarity is determined by the motion of electrons. Because of its bent geometry, which places the negatively charged oxygen atom on one side of the molecule and the positively charged hydrogen atom on the other, water is polar. Because the oxygen atom still has two unpaired electrons after bonding with hydrogen, this causes water to be twisted. The O-H bond is bent away from the linear angle as a result of these electrons' mutual repulsion.
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