Indicate which of the following statements is true (T) and which is false (F). a
ID: 888418 • Letter: I
Question
Indicate which of the following statements is true (T) and which is false (F).
a. Benzoic acid forms a water-soluble salt, whereas naphthalene does not.
b. Carboxylic acids containing six or more carbon atoms per molecule are more soluble in
diethyl ether than in water.
c. Phenols containing six or more carbon atoms per molecule are more soluble in 2.5 M
sodium hydroxide than in diethyl ether.
d. Naphthalene is more soluble in diethyl ether than is sodium phenoxide.
e. As a general rule, aqueous sodium bicarbonate is preferred to aqueous sodium hydroxide
for abstracting acidic compounds from organic solutions.
f. A criterion for a dry organic solution is that the solution is not cloudy.
g. Drying agents need not be removed prior to removing solvents when isolating products.
Specify the effects of the following:
a. inhalation of naphthalene.
b. exposure of your skin to 2-naphthol.
Explanation / Answer
(a) T ( benzoic acid can form a salt which is polar one. and the salt can be soluble in polar solvent water. Whereas naphthalene is insoluble due to its non-polar nature.)
(b) F ( with increase in no.of carbons non-polar nature increases. Therefore solubility increases in organic solvents like diethylether)
(c) F ( with increase in no.of carbons non-polar nature increases. Therefore solubility increases in organic solvents like diethylether)
(d) T ( Naphthalene being a non-polar compound is soluble in org.solvents like diethylether)
(e) T
(f) T
(g) T
Acute exposure of humans to naphthalene by inhalation, ingestion, and dermal contact is associated with hemolytic anemia, damage to the liver, and, in infants, neurological damage. Symptoms of acute exposure include headache, nausea, vomiting, diarrhea, malaise, confusion, anemia, jaundice, convulsions, and coma.