1 / 9

Chapter 7, Sections 3 & 4 Pages 268-279.

Chapter 7, Sections 3 & 4 Pages 268-279. Acids and Bases in Solution. Remember …(Figure 16, pg. 272). Acids taste sour, react with metals, turn blue litmus paper red and have a pH less than 7. Acids are corrosive because they “ wear away ” other materials.

hyatt-booker
Download Presentation

Chapter 7, Sections 3 & 4 Pages 268-279.

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 7, Sections 3 & 4Pages 268-279. Acids and Bases in Solution

  2. Remember…(Figure 16, pg. 272) • Acids taste sour, react with metals, turn blue litmus paper red and have a pH less than 7. • Acids are corrosive because they “wear away” other materials. • Bases taste bitter, feel slippery, turn red litmus paper blue and have a pH above 7. • Indicators are compounds that change color when they come into contact with an acid or base. • Litmus paper is an example of an indicator.

  3. Acids in Solution • An acid produces Hydrogen ions (H+) in water. These Hydrogen ions cause the properties of Acids. (Fig. 17, pg. 275.) • HCl  (H+) + (Cl-) • Remember, ions are atoms that have become electrically charged. • When acid dissolves in water, positive Hydrogen ions are produced. 

  4. Bases in Solution • A base produces hydroxide ions (OH-) in water. • When a base dissolves in water, the positive ions and hydroxide ions separate. • NaOH (Na+) + (OH-) • NH3 + H20 (NH4+) + (OH-) • Figure 18, pg. 275

  5. Strength of Acids and Bases • Acids and Bases may be strong or weak. Strength refers to how well an acid or base produces ions in water. (Fig. 19, pg. 276) • Strong acids produce a lot of Hydrogen ions (H+) in water, compared to weak acids that produce very few. • Strong bases produce a lot of Hydroxide ions (OH-) in water, compared to weak bases who produce very few.

  6. Measuring pH • pH measures the concentration of Hydrogen ions (H+) in a solution. • The pH scale is a range of values from 0 to 14, with 1 being a very acidic value and 13 being a very basic value. (fig. 20, pg. 277) • A solution with a pH higher than 7 is basic and a solution with a pH below 7 is acidic, with 7 being a neutral pH, meaning it’s neither acidic nor basic.

  7. Acid-Base Reactions • When an acid and a base are mixed, they produce a solution that is usually neutral; this process is called Neutralization. • A neutralization reaction usually produces ‘salt’ and water as a product. • Salt is any ionic compound that can be made from the neutralization of an acid by a base. (Fig. 22, pg. 279)

  8. Questions???

More Related