Chem 103 Lab Final latest questions and answers all are correct graded A+

What were the physical properties used to identify alkanes and alkenes? - Answer-Boiling points and Density What color is the potassium permanganate reagent in the Baeyer's test? - Answer-Purple What color is the bromine in the bromine test? - Answer-Yellowish/ Orange Which hydrocarbon will have positive result for the baeyer's and/or bromine test? - Answer-Alkenes What solvent was used to extract curcumin? - Answer-Isopropyl alcohol What is the percent of curcumin found in turmeric? - Answer-3-5% What can curcumin be used as in the lab? - Answer-pH Indicator What instruments were used in this lab? Also know the parts. - Answer-Spec 20 What is the maximum wavelength of curcumin in the UV/Vis sprectrum? - Answer-425 What test was used to classify aldehydes and ketones? - Answer-Tollens Will a ketone or aldehyde react with the Tollen's reagent? - Answer-Aldehyde will react but Ketone will not. What does a positive Tollen's test look like? - Answer-Silver What physical state are the unknown ketone/aldehyde in? - Answer-LiquidWhat is the ketone/aldehyde derivative called? - Answer-2,4 dinitrophenylhydrazone What reagent was used to make the derivative? - Answer-2,4, dinitrophenylhydrazine What is the physical state of the derivative and color is it? - Answer-Solid and Yellow What compound was extracted out of the aspirin tablet? What solvent was used to extract it? - Answeracetylsalicyclic acid What was the acid used in the hydrolysis of acetylsalicyclic acid to salicyclic acid? - Answer-HCl which is diluted 20% to Muratic acid What temperature did this reaction performed at? (salicyclic acid) What is the byproduct of this reaction? - Answer-60 degree Celsius and acetic acid What acid catalyst was used in the esterification reaction (SA to ES)? - Answer-Boric acid What alcohol was used in the esterification of SA to produce the ester? - Answer-ethanol What is the ester produced in this lab (Salicyclic acid)? What is the odor of this ester? - Answer-ethyl salicyclate and wintergreen What is the reagent used to form a violet complex with salicyclic acid but not with acetylsalicyclic acid? - Answer-ferric ammonium sulfate What is the formula for Rf values? - Answer-Rf= (distance moved by the amino acid)/ (distance moved by solvent front) What was sprayed on the chromatograms to help identify the amino acids? - Answer-ninhydrinWhat is the first test used to determine the unknowns in the flow chart? - Answer-solubility of water What was the second test for solubility and what was positive for that test? - Answer-pH indicator and different pH ranges What was used to measure the pH? - Answer-Universal pH indicator What color is malachite? - Answer-bluish green What salt was used to make malachite? - Answer-Na2CO3 sodium carbonate What is malachite considered as in the paint? What is the egg considered as in paint? - Answer-Pigment and egg is the medium or suspension