1. ACIDS AND BASES

2. Do Now  A student has two beakers filled with unknown solids. Both of the solids are white, granular crystals. The student is told that one of the solids is salt, NaCl, and the other is sugar, C 6 H 12 O 6. The student dissolves both solids in water and places an electrolyte tester in both. When the electrolyte tester is placed in both solutions, Beaker A fails to illuminate the electrolyte tester and Beaker B causes the electrolyte tester’s bulb to light up brightly. Which beaker contains salt, and which contains sugar? How do you know?  Predict the products of the following reaction: __ HCl (aq) + __ NaOH (aq)  _________( ) + ________( )

3. By the end of today’s class, I will be able to…  Obj. 1:  SWBAT identify key assumptions of the Arrhenius and Bronsted-Lowry models of acids and bases.  SWBAT determine similarities and differences between the two models of acids and bases.  Obj. 2:  SWBAT predict the products of an acid-base neutralization.

4. Agenda ItemTime Do Now5 min. Arrhenius vs. Bronsted-Lowry20 min. Practice with Acid-Base Definitions15 min. Independent Practice10 min. Neutralization Reactions10 min. Practice15 min. Exit Ticket10 min.

5. Arrhenius vs. Bronsted Lowry

6. Reading alone: 3 min.  Read and annotate the information about the two theories of acids and bases.

7. Make a T chart with a partner Main idea of ArrheniusMain Idea of B-L Any similarities or differences:

8. Arrhenius Definitions  Acids : produce hydrogen ions in aqueous solutions  HCl  H + + Cl -  Bases: produce hydroxide ions in aqueous solutions  NaOH  Na + + OH -

9. Bronsted Lowry Definition Acids: proton (H + ) donor Bases: proton (H + ) acceptor (Bases don’t have to contain the OH - ion)

10. On your own, practice reading for main ideas…  Read and annotate for the main tenets of a scientist’s position or theory.  After each concept, summarize your understanding briefly.  Compare current learning to past learning or conflicting viewpoints to identify main similarities or difference.

11. Agenda ItemTime Do Now5 min. Arrhenius vs. Bronsted-Lowry20 min. Practice with Acid-Base Definitions15 min. Independent Practice10 min. Neutralization Reactions10 min. Practice15 min. Exit Ticket10 min.

12. Which of these is a hydrogen ion? A. OH - B. OH + C. H - D. H +

13. Which of these is a hydroxide ion? A. OH - B. OH + C. H - D. H +

14. HCl placed in water… H 2 O(l) + 2HCl(aq)  Cl - (aq) + H + (aq) So, acid or base? H 2 O(l) + 2HCl(aq)  Cl - (aq) + H 3 O + (aq)

15. Magnesium hydroxide is placed in water… Mg(OH) 2 (aq) + H 2 O(aq)  Mg(aq) + OH - (aq) So, acid or base?

16. Which of the following represents a proton? A. H - B. H + C. OH + D. OH -

17. Bronsted Lowry Definition HCl + NH 3  NH 4 + + Cl -

18. HCl donates a proton HCl + NH 3  NH 4 + + Cl - Acid

19. NH 3 accepts a proton HCl + NH 3  NH 4 + + Cl -

20. Is H 2 CO 3 an acid or base? H 2 CO 3 + H 2 O  HCO 3 - + H 3 O +

21. Which of the following is a Bronsted- Lowry base? HBr + NH 3  Br - + NH 4 +

22. Sum it up… AcidsBases Arrhenius Produce H+ ions Produce OH- ions Bronsted- Lowry Proton (H+) donor Proton (H+) acceptor

23. Agenda ItemTime Do Now5 min. Arrhenius vs. Bronsted-Lowry20 min. Practice with Acid-Base Definitions15 min. Independent Practice10 min. Neutralization Reactions10 min. Practice15 min. Exit Ticket10 min.

24. Agenda ItemTime Do Now5 min. Arrhenius vs. Bronsted-Lowry20 min. Practice with Acid-Base Definitions15 min. Independent Practice10 min. Neutralization Reactions10 min. Practice15 min. Exit Ticket10 min.

25.  Salt and Water Acid + Base  Salt + Water The Products of a Neutralization Reaction

26. Acid + Base  Salt + Water What exactly is a salt?? A salt is a neutral ionic compound produced when the negative ions from an acid combine with the positive ions from a base HCl + NaOH  NaCl + H 2 O

27. Acid + Base  Salt + Water Where Does the Water Come From? Water is formed when the hydrogen ions (H+) from the acid combine with hydroxide ions (OH-) from the base HCl + NaOH  NaCl + H 2 O

28. HCl(aq) + Ca(OH) 2 (aq)  +. Predicting Products…

29. Agenda ItemTime Do Now5 min. Arrhenius vs. Bronsted-Lowry20 min. Practice with Acid-Base Definitions15 min. Independent Practice10 min. Neutralization Reactions10 min. Practice15 min. Exit Ticket10 min.

30. You Try… HNO 3 + Ba(OH) 2  +.

31. Predict the Products HI (aq) + KOH (aq)  _______( ) + ______( )

32. Predict the Products H 2 SO 4 (aq) + NaOH  ______( ) +_______( )

33. Predict the Products HClO 4 (aq) + Ba(OH) 2 (aq)  _____( ) + _____( )

34. Agenda ItemTime Do Now5 min. Arrhenius vs. Bronsted-Lowry20 min. Practice with Acid-Base Definitions15 min. Independent Practice10 min. Neutralization Reactions10 min. Practice15 min. Exit Ticket10 min.