What does a word equation help communicate in chemistry?

• A. The exact molecular weights of all substances.
• B. The rate at which the reaction occurs.
• C. The temperature at which the reaction occurs.
• D. The relationship between reactants and products using words.

Answer: (D)

A word equation communicates the relationship between reactants and products using words. It lists the substances involved on the left (reactants) and the substances formed on the right (products), connected by an arrow, written in their names rather than chemical symbols. This helps you see what changes during the reaction and which substances are involved, without getting into numbers or conditions. It won’t show how much of each substance is needed, how fast the reaction happens, or the temperature at which it occurs. That information requires symbolic equations, coefficients, or data about reaction conditions.