| A | B |
|---|
| neutral | neither acid nor basic/alkaline; pH of 7 |
| pH scale | a scale of 0-14 units that shows how acid or alkaline a solution is |
| neutralization / neutralisation | the process of adding an acid to an alkali or an alkali to an acid to produce an neutral solution; a salt and water are also produced in the reaction |
| *salt | a compound that is produced in a neutralization reaction |
| indigestion | the uncomfortable feeling people get after eating too much rich food |
| antacid | a substance that neutralizes an acid; used to treat indigestion |
| *acid soil | soil that has a low pH |
| *acid rain | rain or any other form of precipitation with a pH less than 5.0 |
