Laboratory 2 Flashcards
(37 cards)
The predominant elements in organic compounds
Carbon and hydrogen
The detection of various elements present in a compound
Qualitative analysis
What happens when there is a production of CO2 in lime water?
lime water turns milky
What will happen if hydrogen is present?
It forms water vapor then CuSO4 will turn blue when it passes.
What is/are the test for detecting nitrogen?
Soda-lime test
The reagent used in the soda-lime test
Urea
The indication that nitrogen is present in the compound.
Ammonia gas is produced
What is/are the test used in detecting halogens?
Beilstein and Silver Nitrate Test
Difference between the two tests for halogens?
Beilstein is a flame test where it is the basis for the indication of halogens. Silver Nitrate test is the the solution of silver nitrate and nitric acid form, producing silver halide
What is the result of Beilstein test?
Green flame that indicates the presence of halogen
The compound responsible for the green flame
Chlorine
The results of the Silver Nitrate Test.
White precipitate
The test used in detecting oxygens.
Ferrox Test
What is the color of the copper loop without chloroform?
No change in color.
Which compounds have positive results in the ferrox test? Cite the results.
Acetone, deep red in color. Ethyl alcohol, reddish-brown.
Which compound is responsible for the brownish-black precipitate?
Cysteine
The reagent in the lead-acetate test?
Cysteine
Difference between the classifications of alcohol.
- Primary-oxidized to aldehydes
- secondary- oxidized to ketones
- Tertiary- cannot be oxidized
The test used to oxidize functional groups
Chromic Acid Test
Which alcohols are positive in the chromic acid test?
1- propanol and 2-methyl propanol
The difference in reactivity of alcohols with hydrogen and halides
Lucas Test
Which are positive in the Lucas Test?
2-butanol (secondary) reacts after a few minutes
2-methyl2-propanol (tertiary) has immediate cloudiness.
The catalyst in esterification.
Sulfuric acid
The results indicated in esterification.
Brownish color of mixture after the reaction.
