Warm-Up

What is a chemical reaction and how might you know that one has occurred?

Also, what are your predictions now for the two substances in the Mystery Mixture?

Quietly answer these questions in complete sentences on your yellow sheet.

Chemical Reactions

An interaction between substances (reactants) that results in new substances being formed (products).

substance-a form of matter with a unique composition and distinct properties.

Learning Target

Investigate the chemical and physical properties of nine substances and determine the two substances in a Mystery Mixture.

Steps for Success

1. Finish testing all nine combinations of substances with water (from yesterday).

2. Re-test the seven reactions and compare them to the Mystery Mixture reaction.

3. Discuss and determine the two substances in the Mystery Mixture as a group.

4. Write a detailed conclusion in your Science Notebook.

Conclusion

In paragraph form, answer these questions: 1. Why did we select the seven

combinations to retest? 2. Which two substances do you think

make up the mystery mixture? 3. Explain the chemical and physical

properties that helped you determine the mystery mixture.

4. What evidence do you have to support your conclusion?

5. Explain three things you learned from this lab.

Lab Expectations

Stay with your group. Stay on task. Work quietly. Wear your safety glasses! Raise hands for questions. Finish all parts-last day in the

lab! Clean-Up carefully at the end of

class.