Chemistry OCR B Salters F334

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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Get Revising

Chemistry OCR B Salters F334

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