Other Ionic Reactions

by Adam Le Gresley, PhD

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    In the previous lecture, we were talking about acid and base chemistry, specifically we were talking about how you create acids, how you create bases and more specifically, the correlation between weak and strong and concentrated and dilute. Now, what we’re going to be doing is carrying out revision exercise considering some of the more common ionic chemistry reactions, so the direct application of what you should have learnt in Module I. So. if we take neutralisation reactions as a starting point, it should come as no surprise that acids react with bases. And here we have an example of such. Sodium carbonate, Na2CO3 reacting in this case with hydrochloric acid to create a salt plus water plus carbon dioxide. Bear in mind, the driving force for this particular reaction is going to be the generation of water and also the carbon dioxide, in this case, which is a gas and obviously escapes. If we look at sulphides, it could also react with acids to form SO2 or sulphur dioxide gas, sodium sulphide, SO3, not to be confused with sulphate, would be... which would be SO4, reacts with hydrochloric acid to, again, provide us with a salt plus water, in this case, a gas, sulphur dioxide. The reality is... is that the sulphur dioxide will actually partially dissolve in the water that you’ve generated and form an acidic solution of sulphurous acid. But, that’s beyond our terms of reference. The neutralisation reaction for the first, the reaction of sodium carbonate with hydrochloric acid, can essentially be broken down into a number of different actual molecular events. Note, you should be careful when using the term ‘molecule’ and ‘ions’ in the same sentence, since ions in their compounds are formed with the units and are never considered to be molecules. However,...

    About the Lecture

    The lecture Other Ionic Reactions by Adam Le Gresley, PhD is from the course Ionic Chemistry. It contains the following chapters:

    • Other Ionic Reactions
    • Solutions and molarity
    • RedOx reactions
    • Oxidising and reducing agents
    • Combination reactions
    • Balancing RedOx reactions
    • Example calculation & summary

    Included Quiz Questions

    1. Mg2-
    2. Al3+
    3. S2-
    4. Cl-
    5. N3-
    1. 7.8 x 10-6 mol/L
    2. 2.0 x 10-5 mol/L
    3. 6.6 x 10-6 mol/L
    4. 1.2 x 10-5 mol/L
    5. 1.56 x 10-6 mol/L
    1. 1.81 g
    2. 0.181 g
    3. 5.02 g
    4. 5.28 g
    5. 3.62 g

    Author of lecture Other Ionic Reactions

     Adam Le Gresley, PhD

    Adam Le Gresley, PhD

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