1. Chapter 3: Matter— Properties and Change
Table of Contents
Chapter 3: Matter— Properties and Change
Law of Conservation of Mass

2. Chapter 3: Matter— Properties and Change Law of Conservation of Mass
Table of Contents
Chapter 3: Matter—
Properties and Change
Law of Conservation of Mass

3. All matter is made of atoms
Chemistry and Matter: Basic Concepts
Chemical Changes
The law of conservation of mass: Matter can neither be created nor destroyed
All matter is made of atoms
Any chemical change involves a rearrangement of the atoms.
Atoms do not just appear. Atoms do not just disappear.

4. Chemical Changes
Reactant: any substance that undergoes a reaction (a chemical change)
Product: each new substance formed when reactants undergo a chemical change (a reaction)
Reactants → Products
The equation form of the law of conservation of mass:

5. Practice! 33.38 g sodium chloride
Basic Assessment Questions
Practice!
A reaction between sodium hydroxide and hydrogen chloride gas produces sodium chloride and water. A reaction of g of sodium hydroxide with g of hydrogen chloride gives off g of water. What mass of sodium chloride is formed in the reaction?
sodium hydroxide + hydrogen chloride →
sodium chloride + water
22.85 g g → sodium chloride g
33.38 g sodium chloride

6. iron + copper (II) sulfate → copper + iron (II) sulfate
Basic Assessment Questions
Your turn!
15.72 g of iron reacts with g copper (II) sulfate to form 8.41 g copper and some iron (II) sulfate. What is the mass of iron (II) sulfate?
iron + copper (II) sulfate → copper + iron (II) sulfate
15.72 g g → g + iron (II) sulfate
20.10 g iron (II) sulfate

7. Ch 3 WebAssign SKIPS:
DO NOT DO: 10 26 32