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    • #19 - Chemical equations 101

    When you mix two chemicals together, what do you get? Well there is a way to find out, sometimes it�s very easy, sometimes it�s absolutely difficult. Despite how difficult it is, there is one universal thing to use to determine what will result in a reaction without actually doing the reaction, and that is a chemical equation. Here�s an example of a chemical equation:

    2Na + Cl2 --> 2NaCl

    ^

    		 (Remember, Cl is a diatomic ion)

    This is the reaction between sodium(Na) and Chlorine(Cl2), which forms salt(NaCl). Sodium and Chlorine are called reactants, the items on the left of the equation, and Salt is called the product, the items on the right of the equation that are created.

    Reactants
    2Na + Cl2 -> 2NaCl
    Product

    In chemistry, when you or your teacher mixes different elements together, they are different in form. These elements can be solid, liquid, gaseous, or aqueous(dissolved in water). They are sometimes represented in the chemical equation. They are placed next to the element to the right in subscript

    -Solids are:(s)
    -Liquids are: (l)
    -Gasses are: (g)
    -Things dissolved in water(aqueous) are: (aq)

    Like in these reactions:

    2Al(s) + 3CuCl2(aq) --> 2AlCl3(aq) + 3Cu(s)
    ^
    Solid Aluminum(Al) combines with Copper(II) Chloride(CuCl2), which is dissolved in water.

    N2(g) + 3H2(g) --> 2NH3(g)
    ^
    Gaseous Nitrogen(N2) reacts with gaseous Hydrogen(H2) to form Ammonia(NH3) which is also a gas

    They help to give more information about the reaction.
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