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Single Double Synthesis and Decomposition Replacement.

Chemistry
Tutor: None Selected Time limit: 1 Day

Hi, guys as you can see I'm not to much of a chemlover seeing as I'm here I was wondering if you guys could show me some examples and maybe show me how and what to do with these types of equations (Single, Double, Synthesis and, Decomposition). This would be quite useful to know I have a lab starting tomorrow and this information would be useful to study up on keep in mind I'm only in high school DONT and I stress this Please Don't use your "high-class" College talk on me ;)

Apr 21st, 2015

The type of reactions that you listed are just common ways that reactions occur.  My high school chemistry teacher used an example of students attending a dance as an explanation by considering any chemical bond as a relationship.

Lets start with a decomposition reaction.  They occur like this:

AB -------> A + B

In this type of reaction one reactant decomposes or breaks apart into two products.  In the example of a dance a couple comes together (AB) but breaks up during that time separating into A and B.


The second type of reaction would be synthesis or sometimes called a combination reaction.  They follow this general formula:

C + D ------> CD.

Here two reactants combine to form one product.  Back to the dance example, persons C and D both come to the dance alone but leave as a couple (CD).


Single replacement reactions are a little more complex as they have two products and two reactants as follows.

M + NX -------> MX + N

Here one reactant replaces the other in the bonded compound.  With the dance example, M comes to the dance alone while N and X are a couple.  Sometime during the night X dumps N and begins a relationship with M.


A double replacement reaction is very similar and occurs like this

MY + NX ------> MX + NY

Here the partners are swapped.  Each person still comes and leaves the dance with a partner but that person changes during the course of the night.


This is something that has stuck with me for many years and hopefully you find it helpful.  When you are trying to determine the type of reaction, just look at what is happening and how thing are changing from the reactants to the products.  Also remember the letters used above may not just represent a single element but may stand for a polyatomic ion or some other larger compound.

Apr 21st, 2015

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