pH Scale and Neutralization Reactions

Vocabulary flashcards reviewing key terms and concepts related to the pH scale, acids, alkalis, neutral solutions, and neutralization reactions.

pH Scale

A scale ranging from 0 to 14 that indicates how strongly acidic or alkaline a substance is, or if it is neutral.

Acids

Substances with a pH below 7 that turn universal indicator red, orange, or yellow, with the strongest acids having a pH of 0.

Alkalis

Substances with a pH above 7 that turn universal indicator blue or purple, with the strongest alkalis having a pH of 14.

Neutral Substance

A substance (such as pure water) with a pH of 7 that turns a universal indicator green.

Neutralization Reaction

A reaction that occurs when acids react with alkalis to form a neutral solution with a pH of 7.

General Neutralization Formula

$$\text{Acid} + \text{Alkali} \rightarrow \text{Salt} + \text{Water}$$

Indicators

Substances that change color depending on whether they are in an acidic or alkaline environment.