Question

When running melting point tests rank and explain which will have the higher melting point, middle melting point, and lowest melting point:

a.) Impure Phthalic Acid

b.) Pure Phthalic Acid

c.) Crystalline Phthalic Acid

Answer 1

a.) Impure Phthalic Acid --> impurities will lower the melting point, typically due to lower BP of impurities nad colligativ eproperties of solvent/solutes

b.) Pure Phthalic Acid --> this will be the middle value, since it contains no other species/sample, it will be the "acutal value"

c.) Crystalline Phthalic Acid = this is the highest melting point, due to the crystalline strucutre formed, the crystal lattices require more energy to "break" in order to melt

c > b > a

answered by: anonymous