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  • Chemistry Factsheet: 228. The A-Level Chemistry of Benzocaine

    Chemistry Factsheet: 228. The A-Level Chemistry of Benzocaine

    This Chem Factsheet is concerned with applying a range chemical principles and skills met at A-level to the benzocaine molecule. It is very much a synoptic exercise and might best be studied towards t...

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  • Chemistry Factsheet: 229. Functional Group Testing

    Chemistry Factsheet: 229. Functional Group Testing

    Functional groups are specific groups of atoms and bonding patterns within molecules that are responsible for the characteristic chemical reactions of those molecules. A particular functional group wi...

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  • Chemistry Factsheet: 230. Colour in Chemistry

    Chemistry Factsheet: 230. Colour in Chemistry

    Amongst inorganic compounds any coloured substance will be a compound involving a transition element. These may be in the form of compound ions (e.g. manganate(VII) – MnO4 - – purple) or c...

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  • Chemistry Factsheet: 231. Colorimetry

    Chemistry Factsheet: 231. Colorimetry

    Colorimetry is a technique used in analytical chemistry which is designed to measure the concentration of a colored compound in solution. It makes use of a device called a colorimeter (see later) whic...

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  • Chemistry Factsheet: 232. The Structure of DNA

    Chemistry Factsheet: 232. The Structure of DNA

    DNA (deoxyribonucleic acid) is arguably, along with RNA (ribonucleic acid) and proteins, amongst the most important molecules in nature. It is a polymeric molecule which is essential for all forms of ...

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  • Chemistry Factsheet: 233. Solubility and Solubility Product

    Chemistry Factsheet: 233. Solubility and Solubility Product

    Describing ionic substances as “soluble in water” or “insoluble in water” is a common occurrence in chemistry. An ionic substance (the solute) is usually described as soluble i...

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  • Chemistry Factsheet: 234. Intermolecular Forces

    Chemistry Factsheet: 234. Intermolecular Forces

    Intermolecular forces are the weak forces of attraction between covalent molecules. They are distinct from other, stronger attractive forces that occur in chemistry. When covalent molecules melt or bo...

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  • Chemistry Factsheet: 235. Examiner’s Approach : Spontaneous Change, Gibb’s Free Energy and Entropy

    Chemistry Factsheet: 235. Examiner's Approach : Spontaneous Change, Gibb's Free Energy and Entropy

    This FactSheet is broken down into 2 sections: 1. Key Note Understanding with Examiner’s Cautions 2. Synoptic Application and Exemplar Questions...

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  • Chemistry Factsheet: 236. Stability Constants (Kstab)

    Chemistry Factsheet: 236. Stability Constants (Kstab)

    To succeed in this topic you will need to: 1. Understand the concepts of ‘dynamic equilibrium’ and Le Chatelier’s Principle (Factsheet 9) 2. Understand the concepts of complex format...

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  • Chemistry Factsheet: 237. Skeletal Formulae

    Chemistry Factsheet: 237. Skeletal Formulae

    Organic chemistry requires the use of a range of different types of formulae. Empirical and molecular formulae provide basic information on the numbers of atoms in any given molecule. Structural, disp...

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