1. Do Now 3/26/15 Predict the products of the following neutralization reaction: HNO 3 (aq) + NaOH (aq)  _________( ) + __________( )

2. Strong Acid vs. Weak Acid 6M HCHCOOH and 6M HCl

3. Objectives By the end of today’s class period, I will be able to… 1. Explain the difference between strong and weak acids and bases. 2. Use the pH scale to describe an acid or base as strong or weak. 3. Calculate the pH of a solution.

4. Today’s Game Plan Do Now5 minutes Hydrochloric Acid and Acetic Acid5 minutes Strong vs. Weak Acids15 minutes The pH scale15 minutes Calculating pH20 minutes pHractice20 minutes Exit Ticket10 minutes

5. Strong Acid An acid that completely dissociates (breaks apart into ions) in water HCl(aq) + H 2 O(l) H 3 O + (aq) + Cl - (aq) This reaction runs completely in the forward direction

6. DISSOCIATION =H+ =A- Strong Acid

7. Weak Acid An acid that does NOT completely dissociate in water This reaction runs almost completely in the reverse direction H 2 O(l) + HC 2 H 3 O 2 (aq) H 3 O + (aq) + C 2 H 3 O 2 - (aq)

8. DISSOCIATION =H+ =A- Strong Acid Weak Acid

9. Turn and Talk Which is a stronger acid? How do you know?

10. A student has acetic acid (a weak acid) and nitric acid (a strong acid) in two unmarked beakers. The student tests the conductivity of each. Which beaker contains each solution?

11. Today’s Game Plan Do Now5 minutes Hydrochloric Acid and Acetic Acid5 minutes Strong vs. Weak Acids15 minutes The pH scale15 minutes Calculating pH20 minutes pHractice20 minutes Exit Ticket10 minutes

12. Measuring acid & base concentration… the pH scale. A measurement of hydrogen ion concentration (MOLARITY) Range from 0-14

13. The pH scale.

14. Which of these samples is the most acidic?

15. Which letter corresponds the following beakers? AB C D

16. The beaker to the right contains a base. What is its most likely pH of the four choices below? AB C D

17. The carbon dioxide in soda is constantly reacting with the water in soda to form carbonic acid as shown in the reaction below. The reaction tends to move more in the reverse direction, which explains why there is so much carbonation in soda! Which letter choice most likely represents the pH of soda? AB C D

18. Today’s Game Plan Do Now5 minutes Hydrochloric Acid and Acetic Acid5 minutes Strong vs. Weak Acids15 minutes The pH scale15 minutes Calculating pH20 minutes pHractice20 minutes Exit Ticket10 minutes

19. The pH scale. Hydrogen ion concentration = [H + ] pH = -log [H + ] pOH = -log [OH-] pH + pOH = 14

20. The pH scale. Hydrogen ion concentration = [H + ] pH = -log [H + ] Calculate the pH of 0.0035 M HBr

21. You try on your notes… Calculate the pH of 1.2x10 -5 M HBr

22. So…. If 1.2x10 -5 M HBr has a pH of 4.9, what is the pOH of the solution? pH + pOH = 14

23. Calculate the pH and the pOH of the following solution: 4.66 x 10 -6 M Acetic Acid solution Acetic Acid is CH 3 COOH

24. Today’s Game Plan Do Now5 minutes Hydrochloric Acid and Acetic Acid5 minutes Strong vs. Weak Acids15 minutes The pH scale15 minutes Calculating pH20 minutes pHractice20 minutes Exit Ticket10 minutes