Question

this passage describes a chemical reaction. read the passage. then, follow the instructions below. toothpaste contains several chemicals that keep your teeth and gums healthy. one of the most common chemicals in toothpaste is sodium fluoride (naf), which helps prevent cavities. sodium fluoride and water (h₂o) can be made by combining hydrofluoric acid (hf) with sodium hydroxide (naoh). manufacturers then mix the sodium fluoride with other substances, including mint flavoring, to make toothpaste. complete the table to classify the substances in this chemical reaction. substance reactant product hydrofluoric acid (hf) sodium fluoride (naf) sodium hydroxide (naoh) water (h₂o)

Explanation:

Step1: Identify reactants and products in a chemical reaction

The reactants are the substances that undergo a chemical change. The products are the new substances formed. The chemical reaction is $HF + NaOH
ightarrow NaF + H_2O$.

Step2: Categorize substances

Hydrofluoric acid ($HF$) and sodium hydroxide ($NaOH$) are reactants as they are used up in the reaction to form new substances. Sodium fluoride ($NaF$) and water ($H_2O$) are products as they are the result of the chemical - change.

Answer:

Substance	Reactant	Product
Sodium hydroxide ($NaOH$)	Yes	No
Sodium fluoride ($NaF$)	No	Yes
Water ($H_2O$)	No	Yes