1 / 16

Acids & Bases

Acids & Bases. What are some common acids that you know of? What are some common bases that you know of? Are acids or bases more harmful to the human body? Explain your answer. Are all acids harmful to your body? What is a pH scale and how is it used?. Goals.

varsha
Download Presentation

Acids & Bases

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. Acids & Bases • What are some common acids that you know of? • What are some common bases that you know of? • Are acids or bases more harmful to the human body? Explain your answer. • Are all acids harmful to your body? • What is a pH scale and how is it used?

  2. Goals • To determine the difference between Acids & Bases. • Be able to identify common acids and bases. • To understand what a pH scale is and how to use one.

  3. Acid & Bases • Acids produce H+ ions in water • The more H + ions, the more acidic the solution. • Bases produce OH- ions in water. • Has a lower concentration of H+

  4. Svante Arrhenius • Focused on what ions were formed when acids and bases dissolved in water • Acids produce H+ in aqueous solutions HClWaterH+(aq) + Cl- (aq) • Bases produce OH- in aqueous solutions NaOH WaterNa+(aq) + OH- (aq)

  5. Properties Acids Bases Produce OH- ions in water pH>7 Taste bitter, chalky Feel soapy, slippery React with acids to form salts and water Turns red litmus paper blue. Electrolytes • Produce H+ ions (H30+) in water • pH<7 • Taste sour • Corrode metals • React with bases to form salts and water • Turns blue litmus paper red. • Electrolytes

  6. Examples of Acids

  7. Examples of Bases

  8. pHis 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 7 is neutral. • Pure water has a pH of 7. • Basic solutions have pH values above 7.

  9. Basic Acidic pH Scale

  10. Sour Candies

  11. Indicators • A compound that can reversibly change color in a solution depending on the concentration of H30+ ions.

  12. LITMUS PAPER • Bases turn RED litmus paper BLUE • Acids turn BLUE litmus paper RED

  13. HYDRION PAPERS

  14. PHENOLPHTHALEIN • A crystalline powder that can determine the pH levels of an acid or base. • COLORLESS IN ACIDS • PINK IN BASES

  15. http://www.youtube.com/watch?v=kzcAFtm-n0w

More Related