1. Teacher Notes Subject: Physical science Topic: Acids and bases Title: Describing Acids and Bases Grade(s): 8 Cross-curricular link(s): Language arts and social studies - Students should be able to identify acids and bases in their everyday lives, and in the topics and stories they are studying Intended learning outcome(s) ·Functionally define a base ·Functionally define an acid ·Recognize how litmus paper is used to determine a if a substance is an acid or base ·Identify and explain some basic uses of acids and bases Recommended usage: Introduction to the study of acids and bases. How to use Notebook(TM) software Learn helpful tips and tricks for developing and presenting lesson activities. © 2005 SMART Technologies Inc. All rights reserved. For further information, please see copyright notice.

2. Windows(R) operating system and Mac OS X operating system software Submitted by Dr. La Tanya Sharpe Describing Acids and Bases H O O H O O Images courtesy of www.PHSchool.com

3. Write your answer in the box, then pull the tab to learn more. An acid is What are some properties of acids? Acids are corrosive to metals, change litmus red, become less acidic when mixed with bases, and give off hydrogen ions in chemical reactions.

4. What are some properties of bases? Write your answer in the box, then pull the tab to learn more. A base is Bases are caustic to organic matter, change litmus blue, become less basic when mixed with acids, and accept hydrogen ions in chemical reactions.

7. When an acid is mixed with a hydroxide base, water is produced. Drag the acid beaker to the hydroxide base and see what is created.

8. Neutralization describe how an acid and base reaction makes a salt and water. Salts are ionic compounds formed from the positive ions of a base and the negative ions of an acid. HCl + NaOH ------> NaCl + H 2 O

9. Acids react with metal to produce hydrogen gas and an ionic compound. Drag the acid beaker to the metal and see what is created.

10. Acids decomposes carbonates into Carbon Dioxide + Salt + Water. Drag the acid beaker to carbonate and see what is created.

11. Acids & Bases BrainPop Quiz http://www.brainpop.com/science/matterandchemistry/acidsandbases/

12. NaClO Sodium Hypochlo-rite (Acid) HC 2 H 3 O 2 A cetic Acid Is this an acid or a base? Touch the pictures to reveal the correct answer. NaHCO 3 S odium Bicarbonate (Base) NaOH Sodium Hydroxide (Base) C 3 H 6 O 3 L actic Acid NH 3 A mmonia (Base) C 6 H 8 O 7 C itric Acid NaOH Sodium Hydroxide(B ase) NH 3 A mmonia (Base)

13. Uses of acids

14. Uses of bases

15. Properties of acids 1 ) Acids taste _sour___, react with metals and carbonates, and turn blue litmus paper _red_.

16. Properties of bases A base is a substance that tastes bitter_, feels slippery, and turns red litmus paper _blue. Bases are described as the opposite of acids.

17. So, you think you know about acids and bases? http://scienceview.berkeley.edu/showcase/flash/juicebar.html Let's play a little game :-)

18. Summary An acid tastes sour, reacts with metal and carbonates, and turns blue litmus red. A base tastes bitter, feels slippery, and turns red litmus paper blue. Cl H H O O H O O

19. Sour Taste H 3 O+ ions Fruits and Juices Feels Slippery Corrosive OH- ions Bitter Reactive with Metals Not Reactive with Metals Conducts Electricity Cleaning Products pH greater than 7 pH less than 7 Blue Litmus Paper Turns Red Red Litmus Paper Turns Blue Acids Bases

20. An acid has a pH of less than 7. Acids release hydrogen ions into solutions. Example: Sulfuric acid Pull A base has a pH of greater than 7. Bases release hydroxyl ions into solution. Example: Bleach Pull Neutral has a pH of 7. Example: Water Pull

22. pH Scale BrainPop Quiz http://www.brainpop.com/science/matterandchemistry/phscale/