• YOU NEED TO BE ON YOUR ABSOLUTE BEST
BEHAVIOR OR THERE WILL BE NO ACTIVITIES
ON MONDAY!!!!
• IF YOU NAME IS LEFT, YOU WILL HAVE
AUTOMATIC AFTERNOON DETENTION AND
A CALL HOME!!!
•
1st Period-
1. Chapter 7 Vocabulary Quiz
• EYES ON YOUR OWN PAPER!!!! Cheating = 0!!!!!
2. Do Worksheet “Describing Acids and Bases” (front
and back)
• You may write on the worksheet.
• What you do not finish in class will be homework.
• I will take it up for a grade on Monday.
•
2nd Period, 4th Period, 5th Period:
1. Chapter 7 Vocabulary Quiz
• EYES ON YOUR OWN PAPER!!!!
Cheating = 0!!!!!
2. Copy Notes ( I will explain them Monday.)
3. Do Worksheet “Describing Acids and Bases” (front and
back)
• You may write on the worksheet.
• What you do not finish in class will be homework.
• I will take it up for a grade on Monday.
Bell Ringer12-02-09
1.
2.
3.
4.
5.
6.
List a property of an acid and an example of an acid.
List a property of a base and an example of a base.
Give an example of a pH value of the strong acid.
Give an example of a pH value of a strong base.
What does the pH scale tell you?
What does pH stand for?
Chapter 7 Section 4
Acids and Bases in Solution
What happens if you combine a corrosive
acid and a strong base?
• Not much of anything!!
• Refer to the chart on p. 243 in your book.
• How do all the chemical formulas for the acids
begin?
• They all start with Hydrogen.
– HCl, HNO3, H2SO4
• Recall: Acids produce hydrogen ions (H+) in
water.
•
Acids in water solutions separate into
hydrogen ions and negative ions.
water
+
HCl ---- H
+
Cl
• Refer to the chart on p. 243 in your book.
• What elements do a lot of the bases include?
• Recall: Bases produce hydroxide ions (OH-) in
water.
• When bases dissolve in water the positive ions
and hydroxide ions separate.
water
+
NaOH ---- Na
+
OH
• Acids and bases may be strong or weak.
• The strength refers to how well an acid or a base
produces ions in water.
Examples
• Strong Acids
– Hydrochloric Acid
– Sulfuric Acid
– Nitric Acid
• Strong Bases
– Sodium Hydroxide
– Drain Cleaner
Weak Acids
- Banana
- Acetic Acid
- Tomato
Weak Bases
- Ammonia
- Baking Soda
pH Scale
pH
•
•
•
•
What does pH mean?????????
p = potential
H = hydrogen ions
pH = the potential to attract hydrogen ions
In water, acids and bases separate into H+ ions or OHions
• ACIDS – low potential to attract
H ions
• BASES – high potential to atract
ions
• Neutralization- reaction between an acid and a base
• Sometimes an acid-base reaction results in a neutral
solution.
• In a neutralization reaction, an acid reacts with a base
to produce a salt and water.
• Chart of Common Salts on page 247