Lesson 14

Mass, Volume, and Dissolving

When substances dissolve, their mass is conserved.

- there is a volume change

- the combined volume of a separate solute and solvent is greater than that of the solution they form!

- This occurs because the particles of one substance occupy the interstices (holes) of the particles of the other, known as the particulate nature of matter.

- Draw an example of the above statement.

- Because it is easy to measure the volume of liquids, a change in volume is most easily observed when two liquids are mixed together.

- Draw an example of this statement.

-When the volume decreases the mass stays the same.

-Draw an example of this statement.

Using a Venn Diagram list the differences between Mass and Volume

Write a hypothesis of what you think will happen as a result of this question: What happens when sodium chloride (NaCl) is dissolved in an aqueous solution (H2O)?