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Recap – Stoichiometry. Balance the equation for the reaction. Calculate the molar mass of all substances. Calculate the number of moles of the starting materials. Use the balanced equation to determine the number of moles of products obtained.

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Recap stoichiometry

Recap – Stoichiometry

Balance the equation for the reaction.

Calculate the molar mass of all substances.

Calculate the number of moles of the starting materials.

Use the balanced equation to determine the number of moles of products obtained.

Use the number of moles of products and their molar mass to calculate their mass.

Amount in moles, n =



The periodic table1
The Periodic Table

  • Periods – rows

    – properties change across a period

  • Groups – columns

    – similar properties are found amongst the members of a group


The periodic table historical
The Periodic Table - Historical

  • 1817 Dobereiner’s “Triads”


The periodic table historical1
The Periodic Table - Historical

  • 1865 Newlands’ “Law of octaves”


The periodic table historical2
The Periodic Table - Historical

  • 1869 Dmitri Mendeleev

    Review: http://www.youtube.com/watch?v=M-lnauoORdA


By the end of this lecture you should appreciate the historical context of the periodic table

Learning Outcomes:

By the end of this lecture, you should:

appreciate the historical context of the Periodic Table


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