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!!!

Chapter 7 Vocabulary Quiz 1st Period- Chapter 7 Vocabulary Quiz EYES ON YOUR OWN PAPER!!!! Cheating = 0!!!!! 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: Chapter 7 Vocabulary Quiz EYES ON YOUR OWN PAPER!!!! Cheating = 0!!!!! Copy Notes ( I will explain them Monday.) 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 Ringer 12-02-09 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?

Acids and Bases in Solution 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. 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. 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 Weak Acids Strong Bases Weak Bases Hydrochloric Acid - Banana Sulfuric Acid - Acetic Acid Nitric Acid - Tomato Strong Bases Weak Bases Sodium Hydroxide - Ammonia Drain Cleaner - 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 OH- ions BASES – high potential to atract ions ACIDS – low potential to attract H 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