Download presentation
Presentation is loading. Please wait.
Published byDoris Cooper Modified over 8 years ago
1
Get Ready! Materials 1.Pencil 2.Notebook Today’s Agenda 1.5-in-5 2.Acid & Base Notes 3.Lab 4.Exit Ticket 1.5-in-5 2.Acid & Base Notes 3.Lab 4.Exit Ticket
2
5-in-5 #29 ~ Review Describe the location of the metals, nonmetals and metalloids on the periodic table and include their properties.
3
Lesson Frame Essential Question: How is pH used to classify solutions? I will… Use the pH scale to differentiate between acids and bases By the end of this lesson I will be able to… Test and place common household products on the pH scale based on their pH.
4
Acids and Bases & the pH Scale
5
What do you know about acids or bases?
6
pH is a measure of how acidic or basic a solution is. The pH scale ranges from 0 to 14. Acidic solutions have pH values below 7 A solution with a pH of 0 is very acidic (…more acidic than a pH of 6). A solution with a pH of 7 is neutral Pure (distilled) water has a pH of 7. Base solutions have pH values above 7
7
What is an acid? pH of less than 7 (Honors) An acid is a solution that has an excess of H 3 O + ions (hydronium ions) (Honors) The more H + ions, the more acidic the solution.
8
Properties of an Acid Tastes Sour Corrosive Means it breaks down certain substances – fabric, skin, paper
9
Common Examples of Acids Acetic Acid - Vinegar Citric Acid - lemons, limes, & oranges. It is in many sour candies such as lemonhead & sour patch kids. Hydrochloric acid - acid in your stomach that helps breakdown your food.
10
What is a base? pH of greater than 7 Another word for a base is alkaline (alkalinity). (Honors) A base is a solution that has an excess of OH - ions (hydroxide ions)
11
Properties of a Base Feel Slippery Taste Bitter Corrosive
12
Common Examples of Bases Soaps and other cleaning products Baking soda Bleach Your blood is a slightly basic solution
13
What is a neutral pH? pH of 7 A chemical solution which is neither acidic nor basic. (Honors) Has an equal number of hydrogen and hydroxyl ions.
14
Properties of a Neutral Tend to be harmless
15
Common Examples of Neutrals Distilled Water
16
pH is a measure of how acidic or basic a solution is. The pH scale ranges from 0 to 14. Acidic solutions have pH values below 7 A solution with a pH of 0 is very acidic (…more acidic than a pH of 6). A solution with a pH of 7 is neutral Pure (distilled) water has a pH of 7. Base solutions have pH values above 7
17
pH Scale X10 A change of 1 pH unit represents a tenfold change in the acidity of the solution. For example, if one solution has a pH of 3 and a second solution has a pH of 4, the first solution is not twice as acidic as the second…it is 10 times more acidic.
18
What do you think?? Prediction: If we mix an acid and a base together what do you think will happen to the overall pH of the solution??
19
Acids & Bases Lab
20
Exit Ticket Which solution is more acidic? Explain why. Solution A – pH 3 Solution B – pH 1 Solution C – pH 10 Solution D – pH 7
21
Acid – Base Reactions A reaction between an acid and a base is called neutralization which forms a salt. An acid-base mixture is not as acidic or basic as the individual starting solutions.
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.