• Like
Acids & bases
Upcoming SlideShare
Loading in...5
×
Uploaded on

 

  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
91
On Slideshare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
2
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. Acids & Bases By Robert McGee
  • 2. Our Goals for today • To determine the difference between Acids & Bases • Discuss the importance of studying Acids & Bases • Perform an experiment dealing with Acids & Bases
  • 3. What is the pH scale? • The pH scale measures how acidic or basic a solution is.
  • 4. The pH scale • The pH scale is the concentration of hydrogen ions in a given substance. [ ] pH = − log H +
  • 5. Identifying Acids and Bases • Acids have a ph from 0-7 • Lower pH value indicates a stronger acid. • Bases have a pH from 7-14 • Higher pH value indicates a stronger base.
  • 6. [OH ] − Definitions of Acids and Bases • An acid is a substance that breaks + into [ H ] ions in an aqueous solution. • A Base (alkaline) is a substance that breaks into [OH − ] ions in an aqueous solution. • Note: aqueous solution is any solution where H 2 O is the solvent.
  • 7. Did we Miss something?? • What happens when the pH of a substance is 7? • Ans: A pH level of 7 indicates a Neutral Substance i.e: Water!
  • 8. Test Your Knowledge • What is the range of an ACID on the pH scale? Ans: 0-7 • What is the range of a BASE and what is another name for a BASE? Ans: 7-14, Alkaline
  • 9. Characteristics Of Acids Acids can be characterized by: 1. A sour taste. 2. It turns blue litmus paper red 3. It tastes sour. Try drinking lemon juice (citric acid)
  • 10. Characteristics of Bases A Base is characterized by: 1. A bitter taste. (Milk of Magnesia) 2. It feels slippery. (Soapy Water) 3. It turns Red Litmus Blue.
  • 11. Why Learn about Acids & Bases? • What do you think is the pH level of tap water? • The pH of a swimming pool must be checked periodically. Why? • Is it important for Lakes & Rivers to maintain a certain pH?
  • 12. Today’s Experiment • Test the pH of Pepsi, tap water, and drain cleaner • GOOD LUCK!!!