CHEM 6.3 Conserving Mass in Chemical Reactions Flashcards
1
Q
What is a scientific law ?
A
A statement that summarizes an observed pattern in nature.
2
Q
Law of conservation of mass
A
States that the total mass of the products in a chemical reaction is the same as the total mass of the reactants.
-Atoms are not destroyed in a chemical reaction, they are simply rearranged
-All of the atoms that existed in the reactants are still present in the products
SAME NUMBER OF EACH TYPE OF ATOM BEFORE AND AFTER REACTION
3
Q
How would you balance H2 + Cl2 –> HCl ?
A
We must add a COEFFICIENT in front of HCl on the product side to balance it.
Balanced equation: H2 + Cl2 –> 2HCl
