2.  In part I you observed the physical properties of 7 common house hold substances. o You observed the color, texture, smell, etc.  In part II you will apply common tests to each substance. o Solubility in water (normal, hot, alcohol), pH (acid-neutral- base), gas production, precipitation, presence of starch. o Testing for both physical and chemical characteristics

3. Solubility: describes the ability of a given substance, the solute, to dissolve in a solvent.solutesolvent Physical or Chemical Property? Physical Property What to look for

4. Does the compound being tested contain starch? What is Starch? – Carbohydrate What does a positive test look like?

5. Phenolphthalein – indicator that tests for acidity/alkalinity – 1-8 Clear (acid or neutral) – 8-12 (alkaline/base) What does a positive test look like? Physical or Chemical Property?

6. Vinegar added to a substance containing a carbonate will produce gas What does a positive test look like? Physical or Chemical Property?

7. What is a precipitant? – is the formation of a solid in a solution during a chemical reactionsolid solutionchemical reaction What does precipitation look like? Physical or Chemical Property?

8.  Once all the results are copied on the board o Develop a flow chart to separate each substance based on the results of these tests.  What does a flow chart look like?