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

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

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.

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:

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 22.85 g of sodium hydroxide with 20.82 g of hydrogen chloride gives off 10.29 g of water. What mass of sodium chloride is formed in the reaction? sodium hydroxide + hydrogen chloride → sodium chloride + water 22.85 g + 20.82 g → sodium chloride + 10.29g 33.38 g sodium chloride

iron + copper (II) sulfate → copper + iron (II) sulfate Basic Assessment Questions Your turn! 15.72 g of iron reacts with 21.12 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 + 21.12 g → 8.41 g + iron (II) sulfate 20.10 g iron (II) sulfate

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