Acidic, Basic, and Neutral Solutions

indicator

A compound that changes color in the presence of an acid or a base

pH

A numerical scale that indicates how acidic or basic a substance is

base

A substance that decreases the hydrogen ion concentration in a solution.

acid

A substance that increases the hydrogen ion concentration of a solution.

hydronium ion

Hydrogen ion combines with a water molecule to form a hydronium ion, H3O(+).

pH meter

determines the pH of a solution by measuring the voltage between the two electrodes that are placed in the solution

atom

(physics and chemistry) the smallest component of an element having the chemical properties of the element