| A | B |
| pH | measures the amount of H+ in solution |
| acid | releases H+ in solution |
| base | releases ions that combine with H+ in solution |
| buffer | helps keep the pH constant |
| salt | formed when NaOH is combined with HCl |
| down | direction pH goes when H+ concentration increases |
| up | direction pH does when base is added to the solution |
| neutral | pH of pure water |
| homeostasis | maintaining the same internal pH |