| A | B |
|---|
| acid | A substance that tastes sour, reacts with metals and carbonates, and turns blue litmus red |
| indicator | A compound that changes color when in contact with an acid or a base. |
| base | A substance that tastes bitter, feels slippery, and turns red litmus blue. |
| hydrogen ion (H+) | A positively charged ion (H+) formed of a hydrogen atom that has lost its electron. |
| hydroxide ion (OH-) | A negatively charged ion (OH−) made of oxygen and hydrogen. |
| a base produces | OH- |
| an acid produces | H+ |
| PH scale | A range of values from 0 to 14 that expresses the concentration of hydrogen ions in a solution. |
| low PH scale tells you | that the concentration of hydrogen ions is high |
| high pH tells you that | he concentration of hydrogen ions is low. |
| acid rain | Rainwater that is more acidic than normal rainwater. |
| neutralization | A reaction between an acid and a base. |
| salt | An ionic compound that can form from the neutralization of an acid with a base. |
