CPR Inorganic pH Blank spaces to be filled with diagrams once printed. 2.0 / 5 based on 1 rating ? ChemistryBonding & shapesInternational BaccalaureateAll boards Created by: Stephen CordenCreated on: 31-05-11 15:47 . . . . pH 1 of 6 The Scale 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ACID NEUTRAL BASE . In water a H+ may be transferred from one H O molecule to another, creating a hydronium ion H O+ , and a hydroxide ion OH- . . . Equal amounts are created so water is generally neutral overall. 2 of 6 pH The equation for pH is: . . and . . Generally one mole of water contains moles of H O+ ions. Therefore the pH of water is 7 3 of 6 Using the Exponentials If [H O+] = 1x10 moles dm then the pH is 7. . If [H O+] = 1x10 moles dm then the pH is -7. . The smaller the pH the more acidic, the larger the pH the more basic. . If we don't know the[H O+] we can usually use the ionic product of water (K ) K = [H O+] [OH-] = [1x10 ] [1x10 ] = 1x10 4 of 6 Useful Equations 5 of 6 Common pH's Acids: Gastric juice = 1 Lemon juice = 2.3 Orange juice = 3.5 Coffee = 5 Milk = 6.6 Bases: Blood = 7.4 Tears = 7.4 Sea water = 8 Baking soda = 8.4 Domestos = 12.5 6 of 6
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