CHEM LAB EXPERIMENT 11 Flashcards
general formula of aldehydes?
R-CHO
what type of aldehyde is formaldehyde?
Aliphatic aldehyde
what type of aldehyde is benzeldehyde?
Aromatic aldehdye
what is the general formula for Ketones?
R-CO-R
what type of aldehyde is acetone?
Aromatic Aldehyde
what type of test was conducted when formaldehyde and benzaldehyde turned to magenta? What made it turned to magenta?
Schiff’s test
what test was conducted when gelatin is made in contact with a type of solution? What happened to the gelatin?
Action of formaldehydes on proteins , the gelatin that made contact with the formalin and was submerged in water become more soluble when it made contact to hot water
what was the byproduct of resorcinols test? what were the chemicals being used?
CH2O + C6H6O2 + H2SO4
created a two layer, where the top layer is sulfuric acid (Aqueous layer) and the bottom layer is resorcinol and formaldehyde
what was the name of the test when it created a red flocculent precipitate in the juncture?
Resorcinol test
what type of test was conducted when the by product was having a presence of a silver mirror?
tollen’s test or silver mirror test
what was the by product of oxidation when HCHO and C6H5CHO was added with tollen’s test?
HCOO^- (Formate ion)
C6H5COO^- (Benzoate ion)
what was the generalization of the action of formaldehyde on proteins?
Formaldehyde decreases solubility of proteins
what was the tollen’s test type of reaction?
oxidation
Benzaldehyde oxidized with air to form white crystals. what type of test does the description fit into?
Auto-oxidation of benzaldehyde
what was the pale yellow of the iodoform test for methyl ketones?
Triiodomethane
