Chemistry OCR B Salters F334

A revision aid for unit 4. I just took a few common themes and questions in the paper and put them all together. Hope you Enjoy :)

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Name the reagent and conditions to oxidize Primary alcohols to Aldehydes
REAGENT: Acidified Potassium Dichromate CONDITIONS:heat under distillation
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Name a reagent and condition for the oxidation of Primary alcohols to Carboxylic Acids
REAGENT:Acidified Potassium Dichromate CONDITIONS: Heat under reflux
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Name the reagent and conditions for the formation of ester bonds
REAGENT: Concentrated Sulfuric acid CONDITIONS: Heat under reflux
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Now Phenols dont react with carboxylic acids to form ester bonds, so how in the world do they manage to acomplish this olympian feat??
React with an Acyl Chloride (R-C(Cl)=O)
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But how do you break an ester link?? give Reagents and Conditions (and its called Hydrolysis)
REAGENTS: Dilute Sulfuric Acid CONDITIONS: Heat under reflux
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How to make an amide link (peptide to you Biologists) What would you react a carboxylic acid or acyl chloride with? (oh and give the reagents and conditions)
Amine group molecule with concentrated sulfuric acid and heated under reflux
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Now what two kinds of reagents can hydrolyze said amide bond?
Acid and Alkali
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What peaks would you expect on a IR spectroscopy graph with a carboxylic acid is put though it
Carbon double bond Oxygen peak, Oxygen-Hydrogen Peak
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What colour does the precipitate [Fe(OH)2] ?
Green
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What test would you use to distinguish an Aldehyde and a Ketone, and what would you see for a positive result?
Fehling's solution- A brick red precipitate will form
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Rank these intermolecular forces in terms of strength (strongest to weakest)- Permanent dipole- Permanent dipole (PD-PD) , Instantaneous Diploe-Induuced diploe (ID-ID), Permanent dipole-Induced Dipole (PD-ID) and Hydrogen bonding (H)
H, PD-PD, PD-ID, ID-ID
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What is T(g) ?
The point at which if the temperature falls below it a polymer becomes brittle
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What happens when you oxidise a Ketone or tertiary alcohol?
Nothing
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What are the benefits of recycling plastics?
No need for landfill space, More environmentally friendly, cheaper raw materials for manufacture of new plastic goods
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What is a primary structure?
The sequence of amino acids in protein chains
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What is a secondary Structure?
Folding of the amino acid chain to form a helix or sheet
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What is a tertiary Structure?
Further folding of the sheet or helix to give the overall shape of the protein
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What order of reaction would a graph of concentration over time be if there was a constant half life?
1st Order
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When making Steel, why is scrap steel added to the blast furnace?
To control the temperature
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Why is there an oxygen blow in the steel making process?
To remove impurities by "burning" them off
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What does a more positive Electrode potential mean?
The metal is a stronger oxidizing agent
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Oxidation is what? and Reduction is What?
Oxidation is loss of electron and Reduction is gain of electrons
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Name a scientific purity check and chemical concentration check
Titration
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What reaction that you have to remember involves potassium manganate and what?
Fe 2+
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Last one, What is the numerical key to the english language? (lets see if you know :p)
4
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Other cards in this set

Card 2

Front

Name a reagent and condition for the oxidation of Primary alcohols to Carboxylic Acids

Back

REAGENT:Acidified Potassium Dichromate CONDITIONS: Heat under reflux

Card 3

Front

Name the reagent and conditions for the formation of ester bonds

Back

Preview of the front of card 3

Card 4

Front

Now Phenols dont react with carboxylic acids to form ester bonds, so how in the world do they manage to acomplish this olympian feat??

Back

Preview of the front of card 4

Card 5

Front

But how do you break an ester link?? give Reagents and Conditions (and its called Hydrolysis)

Back

Preview of the front of card 5
View more cards

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