23. Which of the following substances could be expected to provide the greatest relief for an acid stomach?
(1) bottled spring water
(2) baking soda in water
(3) lemonade
(4) salt water
(5) strong coffee
24. Strong acids are corrosive poisons that can damage living tissues by breaking the chemical bonds holding proteins together. If a child accidentally swallows acid, it is important to quickly dilute the acid, preferably with a high-protein liquid, to minimize tissue damage.
Which of the following liquids would be most appropriate to help a child in this situation?
(1) soft drink
(2) milk
(3) orange juice
(4) salt water
(5) bottled spring water
25. Although pure water is known to have a pH of 7, when water is exposed to other substances, its pH may change.
Which of the following samples of water would be most likely to have a pH of 7?
(1) rain water
(2) carbonated water
(3) well water
(4) distilled water
(5) lake water