1 Compare and contrast an acid and a base, and provide examples of each. on Publishing Company chegg.com 2 Describe the organization of a pH scale. 3 If tomato juice has a pH of 3, how many more H+ ions are present in lemon juice with a pH of 2? 4 If hydrochloric acid, which constitutes gastric juice, has a pH of 1, how many more H+ ions are present than in grapes with a pH of 4? 5 Name three natural indicators. Turmerio clum Ross LITMUS 6 pH paper used to identify if a substance is acidic or basic was previously derived from organisms called lichens. What is the significance of natural indicators? 4 Chegg Om M