Acid-Base Balance pH scale -0 -1 H Stomach acid 2 Lemon juice OH -3 Grapefruit juice Wine Acidic solution -4 Tomato juice -5 -6 Urine NEUTRAL Milk 人7 Pure water [H1=[OH门 Human blood ⊙+ -8 Seawater Neutral solution 9 -10 Milk of magnesia -11 Household ammonia 12 Household bleach 13 Oven cleaner Basic solution -14 Limewater Figure 2.7Acid-Base Balance Figure 2.7