Additional Chemistry Edexel
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Actual Yield | The amount of product obtained from a chemical reaction in reality. This may differ from the theortical yeildbecause the raw materials may not be pure or the reaction my not be complete.
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| Addition | In polymer chemistry, a large molecule formed from alkene monomers added together to form chains.
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| Alkane | A hydrocarbon in which all the bonds are single bonds.
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| Alkene | A hydrocarbon in which two or more bonds are joined by double bonds.
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| Atom Economy | The propertion of reactants that are converted into useful products.
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| Biodegradable | Able to be broken down by soil bacteria.
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| Condensation | A type of reaction in which two molecules join togetherto make a larger one, with water as a by product.
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| Covalent Bond | A type of chemical bond in which a pair of electrons is shared between two atoms.
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| Cracking | A type of chemical reaction in which large alkane are decomposed to form two smaller alkanes and alkenes.
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| Cross-Links | Strong covalent bonds that form between polymer molecules.
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| Displayed Formula | A diagram of the structure of a molecule in which the elements are represented by letters and the bonds are shown by straight lines.
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| Double Bond | Two covalent bonds between two atoms, involving two shared pairs of electrons.
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| Empirical | Worked out from an experiment. A formula of this is worked out by dividing the mass of each element in a compound by its relative atomic mass.
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| Expected Yield | The amount of product expected to be obtained from a reaction.
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| Formula | An abbreviation for a substance with two or more atoms. The formula contains the symbols for the different elements in the substance, with numbers to show if there are two or more atoms of a particular element present.
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| Fraction | A constituent part of crude oil produced by fractional distillation.
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| Fractional Distillation | An idustrial process used to seperate the constituent parts of crude oil.
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| Hydrocarbon | An organic compound contianing just carbon and hydrogen.
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| Hydrogenate | To react with hydrogen.
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| Molecule Formula | A chemical code that shows how many of each atom there are in a molecule.
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| Monomer | A small molecule, for example an alkene, that can be joined to many other small molecules to form a much larger molecule.
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| Monounsaturated | A substance (usually a fat) that only has one double bond.
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| Percentage Yield | The percentage of theoretical yield that you actually get in a reaction.
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| Plasticiser | A substance added to polymers to make them softer and more felxible. They allow polymer chains to slide over each othermore easily.
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| Polymer | A large molecule made by linking lots of small molecules (monomer).
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| Polymerisation | The process by which small alkenes (monomers) join together to form large molecules (polymers).
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| Polyunsaturated | A substance (usaully a fat) that has more than one double bond.
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| Raw Material | A starting substance for the manufature of a particular chemical.
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| Relative Atomic Mass | The mass of an atom compared to the mass of a carbon atom, which has a relative atomic mass of 12.
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| Relative Formula Mass | The mass of a molecule relative to the mass of a carbon atom.
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| Repeated Unit | A section or monomer of a polymer which shows its structure.
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| Saturated Hydrocarbon | A compound of hydrogen and carbon in which there are only single bonds. Aklanes are examples of these.
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| State Symbol | Symbol used in chemical equation to show whether a substance is solid, liquid, gas or dissolved in water.
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| Sustainable Development | Meeting teh needs of teh existing population without damaging the ability of future generations to meet future generations to meet their own needs.
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| Synthesis | Making a substance using chemical reations.
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| Theorical Yield | The maximum calculated amount of product that can be obtained form a particular quantity of reactants.
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| Thermoplastic | A polymer that softens or melts when heated and becomes hard agian when cooled.
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| Thermosetting | A polymer that cannot be melted or remoulded again once formed.
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| Toxic | Poisonous. Can cause death if swallowed, breathed in or come into contact with skin.
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| Toxity | How toxic or poisonous a substance is.
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| Unsaturated Hydrocarbon | A compound of hydrogen and carbon in which there is one or more double bond. Akenes are examples of these.
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| Unsaturated Monomer | A small molecule that can form a polymer because it contains a double bond.
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| Viscous | Sticky or thick, liquids like this are really hard to pour.
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| Hi Danielle | I just got bored :p good luck revising!! from soph :) xx
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