Here are the matches for the terms with their respective descriptions:
- Acid - A compound that increases hydrogen ions (H+) when it is dissolved in a solution.
- Base - A compound that increases the hydroxide ions (OH-) when it is dissolved in a solution.
- Ions - An atom or molecule that has a positive or negative charge.
- pH - A value from 0 to 14 that is used to specify how acidic or basic a compound is when it is dissolved in water.