End of feb test Flashcards
(31 cards)
What is an esterification reaction? (what replaces what; catalyst)
The phenolic (OH) group in the salicylic acid is replaced wit an ester group (from the acetic anhydride); sulfuric acid is catalyst
What is the Fe+3 test?
a quantitative test for phenols
What is a phenol?
Aromatic cpds. w/ OH group; present in the salicylic acid.
What was the positive control for the test? (Synthesis of Aspirin)
The salicylic acid?
What color did the salicylic acid turn? (Synthesis of Aspirin)
deep, dark purple
What color did the lab synthesized aspirin turn? (Synthesis of Aspirin)
Medium purple
What color did the commercial aspirin turn? (Synthesis of Aspirin)
A light purple
What was probably the source of the phenol in the commercial aspirin? (Synthesis of Aspirin)
Probably the age of the aspirin; as it ages the aspiring reacts with H2O in air to form salicylic acid
What was probably the source of the phenol in the lab synthesized aspirin? (Synthesis of Aspirin)
Probably any unreacted salicylic acid reactant
What color is the initial iron (III) ion? (Synthesis of Aspirin)
apple juice color solution
What does an unsaturated fat contain?
at least one double bond
What do polyunsaturated fats contain?
many double bonds in carbon chain
What does a monounsaturated fat contain?
One double bond in carbon chain
Which fats are solid at room temperature?
Saturated fat
What is do saturated fats contain?
Single bonds
What does too much saturated fat lead to?
Heart disease; body can’t break down, clogs veins
Explain the bomine and addition reaction (Bromination of Fats)
- Adds bromine across the C=C double bonds
- Bromine adds to the C that are connected by double bonds so double bonds are reduced to single bonds
Describe the smell of Isopentyl Alcohol + Acetic Acid
Banana
Describe the smell of Ethyl Alcohol + Acetic Acid
Sweet, but not good
Describe the smell of Methyl Alcohol + salycylic acid
Peppermint smell
Why was natural smell better?
Because synthetic was too strong
What is dehydration synthesis?
Carboxylic Acid + Alcohol = Ester + Water
In a no catalyst dehydration synthesis, what forms water?
Acid gives H and alcoghol give OH to form water
In a Fischer acid catalyst dehydration synthesis, what forms water? And what did this reaction require?
Acid gives OH, alcohol gives H to form water; catalyst required (sulfuric acid)
