Chemical Reactions Sc 3200.

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Presentation transcript:

Chemical Reactions Sc 3200

RECAP! What are the five types of chemical reactions studied in this course?

RECAP! What are the five types of chemical reactions studied in this course? Synthesis/ Composition/ Formation Decomposition Single Replacement Double Replacement Combustion

What do they all look like? Aka Tricks to remember Synthesis: - one “+” sign on the left of the arrow Decomposition: one “+” sign on the right side of the arrow Single Replacement: A single element is standing alone on each side of the arrow

What do they all look like? Aka Tricks to remember 4. Double replacement:- a “switch” of partners! Check with your periodic table/ list of polyatomic ions for this one! 5. Combustion: - a special form of double replacement but it always has water(_________) and carbon dioxide(______________) on the left side of the arrow.

Balancing made easy: We know that in chemical reactions: reactants are not lost from one side of the equation to the other. This is why we need to balance each side according to the law of conservation of mass

We start by making a table… or list all of our knowns CH4 + 4 Cl2 -> CCl4 + 4 HCl C = 1 C = 1 H = 4 H = 1 4 Cl = 2 8 Cl = 5 8 Note: If there is no number associated with an element (eg ___C) then one is assumed.