Prac exam prep Flashcards
What catalyst + conditions is used for hydrogenation?
Nickle
What catalyst + condition is used for the hydration of alcohol?
Phosphoric acid 300*c
What catalyst is used for dehydration of alcohol?
Conc sulfuric acid
What catalyst is used for the oxidation of alcohols?
Acidified potassium dichormate
What is the enthalpy change equation?
q=mc∆T (NEGATIVE)
What are the conditions of alkane cracking?
Zeolite catalyst and 450*c
What catalyst is used for the esterification of alcohols?
Conc sulfuric acid
What is the flame test colour for Lithium?
Red
What is the flame test colour for Sodium?
Orange yellow
What is the flame test colour for potassium?
Lilac
What is the flame test colour for calcium?
Brick red
What is the flame test colour for strontium?
Crimson
What is the flame test colour for Barium?
Apple green
What are the 4 solubility trends for group 2 compounds?
All nitrates are soluble
All carbonates are insoluble
Hydroxides increase in solubility down the group
Sulphates decrease in solubility down the group
Wat is used as a test for halides?
Nitric acid followed by silver nitrate then aqueous ammonia
What are the 3 observations from the halide test?
Cl- White ppt that dissolves
Br- Cream ppt that partially dissolves
I- Yellow ppt that is insoluble
What is observed when CCl4 reacts with water?
an immiscible mixture is formed
layers are observed with ccl4 on top
What is observed when SiCl4 reacts with water?
White ppt of Si(OH)4
Misty fumes of HCl
What is observed when PbCl4 reacts with hot and cold water?
No reaction in cold
Sparingly soluble in hot- colourless solution with white solid
What is observed when lead and iodine react?
Canary yellow ppt
What is observed when NaCl and H2SO4 react?
HCl misty fumes
What is overserved when HBr and H2SO4 react?
Misty fumes of HBr
Yellow orange solution (Br) and Chocking gas (SO2)
What is observed when NaI and H2SO4 react?
HI misty fumes
Orange brown solution (I2) and rotten egg smell (H2S)
I2 grey solid
I2 purple gas
What is the OH+ ligand colour change for Cu 2+?
Blue to pale blue
What is the OH+ ligand colour change for Fe 2+?
Pale green to dirty green
What is the OH+ ligand colour change for Fe 3+?
Yellow to rust brown
What is the OH+ ligand colour change for Co 2+?
Pink to blue
What is the OH+ ligand colour change for Cr 3+?
Green to grey green
What is the NH3 ligand colour change for Cu 2+?
Pale blue to royal blue
What catalyst is used to form alcohols from halogenoalkanes?
Reflux with NaOH
What is used to reduce aldehydes and ketones?
NaBH4
What is used to reduce Carboxylic acids?
LiAlH4
What is observed when phenol reacts with bromine?
White ppt and decolourised bromine water (Orange to clear)
What is the test for phenol?
Aqueous iron III Chloride gives a purple colour
What is tollens reagent, what does it test for and what is observed in a positive result?
Ammoniacal silver nitrate
Aldehyde presence
Colourless to Silver ppt
What is Fehling’s solution, what does it test for and what does a positive result look like?
Cu 2+ complex
Aldehyde presence
Blue to Brick red
What is 2,4-DNP, what does it test for and what does a positive result look like?
2,4-Dinitrophenylhydrazine
Aldehydes and ketones
Yellow orange ppt
What is iodoform, what does it test for and what does a positive result look like?
Iodine and aqueous sodium hydroxide
CH3CO
Yellow ppt of CHI3
What catalyst is used for decarboxylation?
Strong heating with Soda Lime (NaOH)
What catalyst and conditions are used for the formation of aromatic carboxylic acids?
Heat with alkaline potassium manganate(VII)
then add HCl
What catalyst is used to form acid chlorides from carboxylic acids?
Phosphorous Pentachloride PCl5 (Dry)
What catalyst is used to from amides from Carboxylic acids?
Ammonium carbonate followed by heating with Phosphorous V Oxide P4O10
What catalyst is used for the halogenation of benzene?
Bromine- iron III Bromide
Chlorine- Aluminium chloride
what catalyst is used for the nitration of benzene?
H2SO4
What reagent is used to from aromatic amines?
Tin and conc Hydrochloric acid
Heated under reflux
followed by NaOH
What are the 5 solubility rules?
All nitrates are soluble
all ammonium and alkali are soluble
all carbonates, phosphates and hydroxides are insoluble (Bar those with rule 1 or 2)
All chlorides, bromides and iodides are soluble except with Ag, Pb or Hg
All sulphate are soluble exept with group Ca, Sr, Ba, Ra or Pb