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  • Chemistry Factsheet: 258. Lewis vs. Brønsted-Lowry: Acid-Base Theories

    Chemistry Factsheet: 258. Lewis vs. Brønsted-Lowry: Acid-Base Theories

    Arrhenius’ Theory Arrhenius’ theory is of historical interest and states: • Acids are substances which produce hydrogen ions in solution. • Bases are substances which produce ...

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  • Chemistry Factsheet: 259. Addition vs. Condensation Polymerisation

    Chemistry Factsheet: 259. Addition vs. Condensation Polymerisation

    To succeed in this topic, you should be familiar with simple organic nomenclature and some simple organic mechanisms...

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  • Chemistry Factsheet: 260. Addition – Elimination Reactions

    Chemistry Factsheet: 260. Addition – Elimination Reactions

    The number of organic compounds and organic reactions means it is important to learn and understand the different patterns observed when chemical species interact with each other. These reaction mech...

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  • Chemistry Factsheet: 261. All the Ps: pH, pOH, pKa, pKb and pKw

    Chemistry Factsheet: 261. All the Ps: pH, pOH, pKa, pKb and pKw

    Acids in aqueous solutions donate a proton or hydrogen ion, H+(aq), to a water molecule. In this reaction water is described as acting as a base, i.e., a water molecule accepts a proton, or hydrogen ...

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  • Chemistry Factsheet: 262. Vanadium Chemistry

    Chemistry Factsheet: 262. Vanadium Chemistry

    To succeed in this topic you should: • Be familiar with the characteristics of Transition Metals. • Be familiar with electronic configurations (Lewis structures). • Be familiar with ...

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  • Chemistry Factsheet: 263. Biodegradable Polymers

    Chemistry Factsheet: 263. Biodegradable Polymers

    After completing this Factsheet, you will be able to: • Recall the definition of biodegradable. • Recognise the problems caused by non-biodegradable polymers, • Recall the necessary ...

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  • Chemistry Factsheet: 264. How to Do Bond Enthalpy Calculations

    Chemistry Factsheet: 264. How to Do Bond Enthalpy Calculations

    After completing this Factsheet, you will be able to: • Calculate bond enthalpies from given reaction data. • Calculate reaction enthalpies from given bond enthalpies. • Understand w...

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  • Chemistry Factsheet: 265. Electrolysis – An Electrode Potential Approach

    Chemistry Factsheet: 265. Electrolysis – An Electrode Potential Approach

    Electrolytic cells may require an external source of electrical energy to drive reactions that are not spontaneous. Fig. 1 describes the basic set up for the Hoffman Electrolysis Apparatus, which is...

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  • Chemistry Factsheet: 267. Addition Reactions in Asymmetric Alkenes

    Chemistry Factsheet: 267. Addition Reactions in Asymmetric Alkenes

    Addition Reactions Simple alkenes of the general formula CnH2n undergo addition reactions with small electrophilic species such as hydrogen halides, halogen molecules, hydrogen gas and, under the r...

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