What happens when substances are mixed with water Lesson 12 What happens when substances are mixed with water

Lesson 12 – What Happens When Substances are Mixed with Water? You will mix several substances with water and observe what happens. 2

Lesson 12 - COS 1.0 1.1 1.2 1.3 1.4 1.5 6.0 3

Objectives Make observations of what happens when different substances are mixed with water. Identify the characteristics of solutions. Define and use some terms that describe the parts of a solution and the processes that take place when solutions are formed.

Getting started Your group will be given a test tube containing a mixture of food coloring and water. In your notebook, write all the properties of this mixture that you can observe.

Lesson 12 - (1-2) Vocabulary soluble - substances that will dissolve insoluble - substances that will not dissolve solubility - the amount of solute that will dissolve in a solvent at a given temperature and pressure; the ability of one substance to dissolve in another. solvent - the substance that the solute is dissolved in; the substance present in the larger proportion 6

Lesson 12 - (2-2) Vocabulary solute - the substance that dissolves in a solvent; the substance in the smaller proportion; may be solids, liquids, or gases. aqueous solution - solution in which water is the solvent dissolving – The process that takes place when a solvent is mixed with a solute to make a solution. 7

Lesson 12 - Question What property of matter determines what type of mixture a substance will form when mixed with water? 8

Lesson 12 If…. then…. because …. Hypothesis 9

SAFETY Wear safety goggles throughout the lesson. If you splash a solution in your eyes, immediately flush out your eyes with a bit of water and report the accident to your teacher. Do not mix the contents of different test tubes. When you complete the Inquiry wash your hands.

Lesson 12 Procedure Gather materials. Construct a data table. Put one lab scoop of a substance in a test tube. Add water to a depth of about 10 cm. Shake ten times. Record observations. Repeat with each substance. 11

Results L 12 What Happens to a Solid? Sugar Sodium chloride Sulfur Name of Substance added to water Appearance after being shaken 10 times Does it dissolve? (Yes or No) Sugar Sodium chloride Sulfur Zinc oxide Copper sulfate 12

Lesson 12 – Conclusion Solubility is a characteristic property of matter. Solutions consist of a solvent and a solute. A solvent is the substance present in the larger proportion in a solution. A solute is the substance present in the smaller proportion. The components of a solution can be solids, liquids, or gases. When a solid is passed into solution, it is said to dissolve………….. 13