BMLS

1. LABORATORY QUIZ 7
CHEMISTRY 1
NAME: Tupaz, IshiPearlC.
SECTION: BMLS 1-E
I. Given the following solvents:
a. water
b. isopropyl
c. n-hexane
d. carbon tetrachloride
Using the general rule that like dissolves like, which solventwould you choose to
dissolvethe following? Justify your answers.
1. Bike
2. Oil-based paint
3. Latex paint
4. Soap
5. Candle wax
6. Dichlorodiphenyltrichloro ethane, DDT
Answer:
1.
2. Carbon tetrachloride and n-hexane can dissolve candle wax because other
organic materials such as oils, fats and grease are dissolved very well by
carbon tetrachloride and because oil-based paint and n-hexane are non-
polar, n-hexane can dissolve oil-based paint.
3. Latex or water-based paints can be cleaned up with just soap and water
because ionic and polar compounds dissolve in polar solvents.
4. The soap becauseof the two separateparts of the molecule can be dissolved
bywater, thesoap moleculeis watersolubleand can dissolvefatsatthe same

2. time. The fats are drawn to the soap's non-polar tail part, while the polar
head dissolves the entire complex (soap + fat) in water.
5. Since carbon dissolves other organic materials such as oils, fats and grease
very well, carbon tetrachloride can dissolve candle wax.
6. Using carbon tetrachloride because DDT can dissolve dichlorodiphenyl
trichloro ethane or DDT is extremely fat soluble (dissolves easily in fat), but
is poorly insoluble in water. Itappears to accumulate in the fatty tissues due
to its " fat loving " nature.