Agenda: April 27, 2015 p. 148Big 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

OVERALL REACTION: 2H2O → H3O+ + OH-

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-

Acids produce H+ in water

Bases produce OH- in water

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

Lab

What about the household chemicals we are using everyday?

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