Is hydrocyanic acid (HCN) more soluble in water or in carbon disulfide (CS2)? Why?

Expert Solution

To answer this question you must remember the rule "like dissolves like" this helps to remember how a solvent works basically what it says is that a polar substance will dissolve a polar substance a non polar substance will dissolve a non polar substance

A polar substance will not dissolve a non polar substance so this is about polarity, lets find it

H C N , this is all about putting together the electronegativity values H has aelectronegativy value of 2.1, has a value of 2.5 and N has a value of 3 so the Carbon has a higher force than hydrogen to attract electrons and Nitrogen has a higher value than carbon so if we draw it we get:

------------------>------------------->, there is a force to attract electrons, this is called a dipole moment so because of the existance of it this molecule is considered to be polar

If you repeat this procedure for water and CS₂ you will find that water is a polar molecule

CS₂ is a nonpolar molecule

So according to the rule HCN is more soluble in water than CS₂

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queen_honey_blossom answered 2 years ago

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