PPT-19.2 Amino Acids as Acids and Bases

When an amino acid with positive and negative charges is overall neutral in charge it is said to be at its isoelectric point pI Ballandstick model of glycine at its pI of 60. Acids turn blue litmus to red 2 Acids turn methyl orange to red Bases effect indicators 1 Bases turn red litmus to blue 2 Bases turn methy l orange to yellow 3 Bases turn phenolphthalein to purple Acids neutralize bases producing a salt and water Ba Some Important Acids. (All acids have H atoms). Properties of Acids. Sour Taste. Reacts with Metals (Produce Hydrogen Gas). Reacts with Carbonates (Produce CO2). Turn Litmus Paper Red. Natural Indicators. DNA. Deoxyribonucleic acid. Complex molecule found in the nucleus of cells and in small quantities in mitochondria and chloroplasts. DNA (Deoxyribonucleic Acid). discovery/history. 1950’s. x-rayed by Rosalind Franklin. p. 191-195. Anything about the pH scale?. Alkaline is another name for a base.. acid/base intro video. What can you tell me about acids and bases?. 1.2 Acids and Bases. pH scale- . indicates the acidity of a solution. Chapter 8.1. Objectives. Describe the ionization of strong acids in water and the dissociation of strong bases in water.. Distinguish between solutions of weak acids or bases and solutions of strong acids or bases.. 1) Add . 3 questions . to your Cornell Notes on . pgs. 11-12. 2) Add a . summary. to your notes on . pg. 11-12. 3) Add . 3 questions . to your Cornell Notes on . pgs. 18. 4) Add a . summary. to your notes on . Taste. Acids taste sour. Foods. citrus fruits . yogurt and sour milk. carbonated beverages. vinegar. Acid. citric acid. lactic acid. carbonic acid. acetic acid. Bases taste bitter. Like soap. Touch. MEASUREMENT. REACTIONS. The sour and spicy tastes are properties of acidic substances. The bitter taste is a . property of basic . substances. ACIDS & BASES. INTRODUCTION. Your own body produces acids and strong bases. Chemistry. Jacqueline P. Hancock, B.S., . M.Ed. Acid-Base Theories. Bracken Cave, near San Antonio, Texas, is home to twenty to forty million bats. Visitors to the cave must protect themselves from the dangerous levels of ammonia in the cave. Ammonia is a byproduct of the bats’ urine. You will learn why ammonia is considered a base.. Explain the chemical composition of acids and bases, and explain the change of pH in neutralization reactions.. D12. I can differentiate between acids and bases.. Learning Target. When dissolved in water, they ionize (form ions). A special solution. Acids and bases are ALWAYS in a water solution.. Your body has water in it so they are always dangerous to living things.. Bases are just as dangerous as acids.. In low . concentrations. . are organic molecules that are the building block of . . proteins. .. -There is 20 . α. -amino acids commonly found in . proteins. . ( . they . have a carboxyl group and an amino group . . . Objectives. Relate the process of ionization to the formation of acids and bases. Explain qualities of acids and bases . Compare the acidity of substances, using the pH scale and pH indicators . Use molarity and titration to determine the concentration of an acid . Proteins. Part I. Dr. Ravish Chauhan. Associate Professor. IGN College, Ladwa. . . Amino Acids. . These are the compounds which contain both amino and carboxylic group.