1. Types of Reactions & Combination Reactions Presented By : Jill Gnap and Rahner Park

2. Types of Reactions There are many ways to categorize chemical reactions, but there are five general reaction types. Combination Decomposition Single Replacement Double Replacement Combustion

3. Types of Reactions

4. Combination Reactions A combination reaction is when two or more substances react to form a single substance. Combination reactions are most common with two or more elements or compounds. For example, rust is a combination reaction with oxygen and a metal.

6. More on Combination Reactions There are three types of combination reactions. Reaction between two or more elements Reactions between elements and compounds Reaction between two compounds Most combination reactions in nature are exothermic (release heat). This is from the large amounts of energy formed from natural reactions. For more information and a better understanding on the subject, click herehere

7. How do you do a combination reaction? 1.Write the formulas of the reactants 2.On the product side, write the charge as a superscript. If a multivalent element is being used, use whatever charge you want. 3.Perform “Cross Products” 4.Balance the equation.

8. Let’s learn how to show reactions in an equation. A+B  AB

9. Now for a more complex one! Don’t forget to balance the equation! Na (s) +Cl 2(g)  2NaCl (s)

10. HW: For this, you have to do solve it backwards. We give you a product and you tell us the reactants: With CO as the only reactant, what are your reactants? Don’t forget to balance!