ORGCHEM LAB EXAM REVIEWER

• This type of hydrocarbons are inert towards oxidizing agents

  Saturated hydrocarbons
• Give examples of Oxidizing agents

  HCL, H2SO4

  KmNO4 and Na2Cr2O7 at room temperature
• Complete the sentence:

  This inertness can be attributed to the _________ involved in the molecule

  type of bonds
• Saturated Hydrocarbons react towards some reagents by ____?

  Substitution reaction under rigorous conditions
• The characteristic reactions of the alkenes are those that take place at the ___ which consist of ____?

  double bond; strong sigma bond and a weak pi-bond
• What bond breaks in alkenes during a reaction?

  weak pi bond
• Typical reaction of the double bond in alkenes


  Addition rxn

  
• What is the Baeyer's test?


  Method for detecting unsaturation
• Complete the sentence:

  Alkenes can ______ a ______, ______ _______ by which the _____ color disappears and is replaced by _____ ______

  Alkenes can decolorize a cold dilute, neutral permanganate solution by which the purple color disappears and is replaced by brown MnO2
• What is the positive and negative result of the baeyer's test?

  Positive: Brown color

  Negative: Purple color
• What compound makes the positive result of the Baeyer's test brown?

  MnO2
• Asides from Alkenes, Addition reaction is also exhibited by _____

  Alkynes
• Give the chemical equation of the baeyer's test using an alkene


  :

  
• What is the color of the alkane produced in the Baeyer's test?

  Colorless
• Why are Aromatic Compounds saturated?

  They exhibit resonance that result to conjugative stability of the molecule. They resist addition to the pi bonds which makes them undergo Substitution rxn resembling saturated hydrocarbons
• Complete the table:

  ------------Napthalene Gasolene Kerosene Vaseline Paraffin

  Color

  Odor

  Density

  Litmus Paper

  Solvent H2O

  Ether

  EthylOH

  CHCl3

  H2SO4

  Baeyers Test

  Flammability

  :)

  
• What are the Physical Properties of Acetylene

  colorless, odorless, flammable
• Give the equation for the preparation of Acetylene:


  :>

  
• What is CaC2

  Calcium Carbide
• Give the Chemical equation for the reaction of acetylene and KMnO4

  this

  
• Give the Formula for the Carboxylate Salt Produced in the Baeyer's Tes and Give the name

  Oxalic Acid

  
• Reaction with CuCl2 and give the name of the product

  Cuprous acetylide

  
• Reaction of Cuprous acetylide w/ HCl


  :

  
• Combustion of Acetylene formula


  :

  
• Rxn of Acetylene w/ lime water


  >

  
• Rxn of acetylene w/ ammonia


  :

  
• Physical Properties of Aliphatic HC

  Non-polar

  water insoluble

  substitution high non polar

  flammable
• Chemical properties of Aliphatic HC

  rxn w/ oxidation

  rxn w/ addition

  rxn w/ substitution (alkane)
• Physical And Chemical properties of Aromatic HC

  Physical:

  Non-polar

  water insoluble

  flammable

  polyatomic are more dense than H2O

  Chemical:

  Substitution rxn
• Give the Formula for primary, secondary, and tertiary alcohol

  .

  
• Positive result of chromic test

  bluee-green color
• Positive test of Lucas test

  Cloudiness
• _____ easily burn and release a lot amount of energy

  Alcohol
• Combustion of alcohol is a _____ reaction and produces

  Exothermic; carbon dioxide and water
• Chromic acid test is an oxidation test that differentiates the alcohols in which primary and secondary alcohols are oxidized into aldehydes an ketones.
• Chromic acid test is indicated by the change in color from orange to green
• Lucas test reacts with tertiary alcohols immediately to form a cloudy alkyl halide and separates into a distinct insoluble layer. Secondary alcohols after five minutes while primary alcohols do not react under the condition.
• Ethers burn very quickly when ignited. They are generally volatile and flammable
• The absence of an -OH group in the ether also has important consequences for its chemical properties. Unlike alcohols, they have very low chemical reactivity.
• Ethers do not react with most oxidizing or reducing agents, and they are stable to most acids and bases, at high temperatures. Hence, they are often used as solvents for chemical reactions.