1. Agenda: April 27, 2015p. 148 Big Idea: pH 1.Warm-up: What is pH and why should I care? 2.Review & Vocab (p. 37) 3.#66: Down the Drain Lab p 155 4.Reflection 5.Homework: #65: Acid & Base Flash Cards #67: Acid Rain p 152

3. OVERALL REACTION: 2H 2 O → H 3 O + + OH -

6. pH measures the concentration of H+ Water has a neutral pH [H+] = [OH-] which means pH= 7 What did your water look like after 10 minutes? H+ OH-

7. Acids produce H+ in water

8. Bases produce OH- in water

9. pH pH values less than 7 are acidic pH values more than 7are basic pH value = 7 are neutral Measures the [H+] ions and the acidic or basic nature

10. Lab What about the household chemicals we are using everyday?

11. KAHOOT QUIZ Rules: 1.Sign in using your Last name FIRST and then your first name 2.We start when everyone is signed in