Chemical Reactions Flashcards
What are the 7 ways you know a chemical reaction has occured?
Decrease or increase in temperature, sound or light is produced, appearance of a new color or odor, formation of gas bubbles, or the formation of preciptate.
When a chemical reaction happens, the ___
Bonds of the reactants break and release energy.
Elements are rearranged in new combinations
New compounds are formed with new properties
Only elements that are present in the original reactants can appear in the new substance, true or false?
True
If you ___ the amount of reactants in a chemical reaction the amount of products will also ____
Increase, increase.
What is a reactant?
Substances used to form a new substance in a chemical reaction
What is a product?
A substance produced in a chemical reaction.
What is a catalyst?
Something that allows a chemical reaction to be sped up.
What is the Law of Conservation of Mass?
An idea started by John Dalton, but solidified by Lavossier, which states that matter cannot be created nor destroyed.
What is an endothermic reaction?
A reaction that occurs where the temperature of the products decreases. Energy is released when the bonds in the product are formed. Endothermic reactions are usually cooler, and the energy is on the reactant side.
What is an exothermic reaction?
A reaction that occurs where the temperature of the products increases. Heat light or sound is usually produced. Exothermic reactions are usually warmer, and the energy is on the product side.
Who is Lavossier?
French man who solidified the idea of the Law of Conservation of Mass
What is a combustion reaction?
A reaction where oxygen is ALONE on the reactant side of the equation
What is a synthesis reaction
The combination of 2 or more reactants to create 1 or more new product
What is a decomposition reaction?
The breakdown of 1 compound into simpler components
What is a double displacement reaction?
When an 2 elements (on the reactant side) reorder on the product side
FOR EXAMPLE AB+ CD= AD+CB
