Chemical Reaction and Law of Conservation of Mass/Matter Flashcards
What is a chemical reaction?
A chemical reaction starts with a substance or substances and ends up with new substances as a result of the rearrangement of atoms.
What are the starting substances in a chemical reaction called?
Reactants
What are the produced substances in a chemical reaction called?
Products
How does a chemical reaction differ from a state change?
In a chemical reaction, the starting substances are different from the produced substances, while in a state change, the substances remain the same.
What happens to bonds during a chemical reaction?
Bonds within the reactants are broken and new bonds are formed between the separated atoms to make the products.
What symbols are used in chemical equations to represent states of substances?
s, l, g, and aq
What does ‘s’ represent in a chemical equation?
Solid
What does ‘l’ represent in a chemical equation?
Liquid
What does ‘g’ represent in a chemical equation?
Gas
What does ‘aq’ represent in a chemical equation?
Aqueous (dissolved in water)
What are some signs that indicate a chemical reaction has occurred?
Color changes, production/absorption of heat, production of smells, etc.
What does the Law of Conservation of Matter/Mass state?
In a chemical reaction, no matter is created or destroyed; it is just rearranged.
What must remain the same in terms of atoms during a chemical reaction?
The total number of atoms within the reactants must be the same as the total number of atoms within the products.
What must remain the same in terms of mass during a chemical reaction?
The total mass of the reactants must be the same as the total mass of the products.
