Synthesis:
Where 2 or more reactants combine together to form 1 product.
It takes this general form:
A+B--->C.
Decomposition:
This is a reaction where one reactant is decomposed into 2 or more products.
The general form is
A---> B+C
Single Replacement:
This one is more tricky! It takes the general form of
A+ BC---> AC +B (if A is a metal) or A+ BC----> B +AC (if A is a non-metal).
The metals switch with each other and non-metals swith with each other. But that's not all we have to worry about..
Double displacement:
This is when the anions and cations of two different molecules switch places, forming two entirely different compounds. These reactions are in the general form:
AB + CD ---> AD + CB
Combustion:
A combustion reaction is when oxygen combines with another compound to form water and carbon dioxide. These reactions are exothermic, meaning they produce heat. An example of this kind of reaction is the burning of napthalene:
C10H8 + 12 O2 ---> 10 CO2 + 4 H2O
Neutralization:
This is a special kind of double displacement reaction that takes place when an acid and base react with each other. The H+ ion in the acid reacts with the
HA + BOH ---> H2O + BA
***Note***
Remember that the single element on the reactants side must be above the element it switches with on the ACTIVITY SERIES chart. This is because some elements are more reactive than others.
Refer to the following reaction:
1Cu + 2AgNO3 ---> 2Ag + 1Cu(NO3)2
Cu switches with the other metal, Ag. This is a reaction because copper is above silver on the ACTIVITY SERIES chart.
Here is the activity series chart :
This link will lead you to a bunch of online worksheets. It also provides a lot of information about all the topics we've learned or will be learning in chemistry. Check it out!
http://www.chalkbored.com/lessons/chemistry-11.htm
Net Ionic Equations:
A Net Ionic Equation is a chemical equation for a reaction which lists only those species participating in the reaction.
To write a Net Ionic Reaction, follow these 3 steps:1) Start by simply writing the overall balanced chemical reaction. This is also called the Molecular Equation.
2) Then, you break apart the soluble molecules into the two ions that are formed (one positive and one negative). You will have to use the solubility rules to do this, they can be found online. If something is insoluble, it should not be broken apart. Write the reaction out with all of the separated ions. This is called the Total Ionic Equation.
3) Then, you simplify by canceling things out if they appear on both sides of the reaction, resulting in the Net Ionic Equation.
For example, let look at the reaction of calcium carbonate with hydrochloric acid to form calcium chloride, water, and carbon dioxide:
Molecular Equation:
CaCO3(s) + 2HCl(aq) ---> CaCl2(aq) + H2O(l) + CO2(g)
Total Ionic Equation:
CaCO3(s) + 2H+(aq) + 2Cl-(aq) ---> Ca2+(aq) + 2Cl-(aq) + H2O(l) + CO2(g)
Net Ionic Equation:
CaCO3(s) + 2H+(aq) ---> Ca2+(aq) + H2O(l) + CO2(g)
Notice that the Cl- was canceled out from the Net Ionic Equation, because it really isn't playing an important part of this reaction. It is just there to balance out the charge because you can't have an ion just by itself -- you must always pair an ion with another one of opposite charge so that the overall charge is zero.
Read more: http://wiki.answers.com/Q/How_do_you_write_a_net_ionic_equation#ixzz1EwvvFFLi
Read more: http://wiki.answers.com/Q/How_do_you_write_a_net_ionic_equation#ixzz1EwvoG0Ua
If you want to practice more, there is a link for the net ionic equation worksheet:
http://www.docstoc.com/docs/6547241/Net-Ionic-Equations-Worksheet
Have a great weekend!!!
