Properties and Indicators Acids & Bases Properties and Indicators

Properties ACIDS BASES electrolyte electrolyte sour taste bitter taste sticky feel slippery feel turn litmus red turn litmus blue react with acids to form water and a salt (ionic compound) react with bases to form water and a salt (ionic compound)

Acids Affect Indicators: Blue litmus paper turns red in contact with an acid. 3

Red litmus paper turns blue in contact with a base. Bases affect indicators: Red litmus paper turns blue in contact with a base. Phenolphthalein turns pink in a base. 4

Examples ACIDS: Most citrus fruits, tea, battery acid, vinegar, milk, soda, apples. BASES: Common household bases include baking soda, lye, ammonia, soap, and antacids. . 5

pouvoir hydrogène (Fr.) pH Scale 14 7 INCREASING ACIDITY INCREASING BASICITY NEUTRAL pH is the negative logarithm of the hydrogen ion concentration pH = -log[H+] pouvoir hydrogène (Fr.) “hydrogen power”

pH Scale 7

pH of Common Substances pH Scale pH of Common Substances

Titration standard solution unknown solution Titration Analytical method in which a standard solution is used to determine the concentration of an unknown solution.

Titration Equivalence point (endpoint) Point at which equal amounts of H+ and OH- have been added. Determined by… indicator color change dramatic change in pH

Acids Bases H+ ions- Hydrogen ions OH- ions- hydroxide ions H3O+ ions- Hydronium ions Proton donor Electron donor

Molarity Molarity= moles of a substance/liter water Molarity= M Ex. 18M Sulfuric acid means that there are 18 moles of sulfuric acid per one liter of water Molarity deals with liquid solutions