In this experiment, several organic chemicals were tested for their solubility. These organic chemicals are acetone, ethanol, ethyl acetate, ethyl ether, hexane and methanol. They were put to test with potassium bromide (KBr), an ionic compound, benzoic acid, an organic acid, and water.
CH3
•wCH2
•wO
•wH
CH3
•wC
•wO
•wCH2
•wCH3
CH3
•wCH2
•wO
•wCH2
•wCH3
CH3
•wCH2
•wCH2
•wCH2
•wCH2
•wCH3
C
•wO
•wH O
Potassium Bromide Benzoic Acid Water
The functional group of acetone is ketone, it contains a C=O and it has a dipole moment. Both ethanol and methanol has the same functional group, hydroxyl group, OH. Ethyl Acetate has a C
•wO group commonly known as an ester group. Ethyl ether contains an ether group which structure looks like R
•wO
•wR¡. Hexane doesn¡t have any functional group but only C
•wC bond linked together. Potassium bromide is an ionic compound which will separate into K+ and Br- when put into water. Benzoic acid is an organic acid with a benzene group and a carboxyl group, C
•wOH, it is also capable for hydrogen bond.
The hypothesis for the solubility behavior of potassium bromide in water and in hexane is that potassium bromide would most likely to dissolve in water but not in hexane. This is because of the polar property of chemicals. In water molecules, the hydrogen atoms have a partial positive charge and the oxygen atom has a partial negative charges. The positive ends of the water molecule strongly attract the negative ends of other polar compounds, in this case the bromine atoms of potassium bromide. Likewise, the negative ends of water strongly attract the positive ends of neighboring compounds, the potassium atom...