Editing revision 4 of Double Replacement Rxn - Neutralization Rxn

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As you know, one of three products (form a solid, water or gas) must be produced in a double chemical reaction for the reaction to occur. Here, we will explain formation of one of these products: the formation of water.

As with all double replacement reaction, you have two reactants that are aqueous (compounds that break-up into their ions in water). In other words, you have a bucket of ions before the reaction occurs. The task is to rearrange the ions into new compounds (cpds) knowing that like charged ions can't create cpds.

Even though water (H2O) is a molecular cpd, we often think of it as made up of two ions, hydronium ion (H+1) and hydroxide ion (OH-1). Therefore, one of our reactants must contain the hydroxide ion (OH-1) and one must contain the hydronium ion (H+1). If you place these two reactants into a bucket, you product water (H2O). See example below.

These types of reaction are very common place to the point that we give the reactants and chemical reaction special names:
*Acid - a compound that breaks up into ions in water where one of the ions is hydronium ion (H+1). 
*Base - a cpompound that breaks up into ions in water where one of the ions is the hydroxide ion (OH-1).
*Neutralization Rxn - a double replacement reaction that produces water (H2O) as one of its products. The two reactants are an acid & a base.

*Example of Neutralization Reaction

**1 NaOH(aq) + 1 HCl(aq) ==> 1 H2O(l) + <nowiki>NaCl<nowiki>(aq)

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