A pH value of 7 indicates that_____________ of a strong acid and a strong base are neutral.

A pH value of 7 indicates a neutral solution and salts of a strong acid and a strong base are considered neutral because they do not produce an excess of hydrogen ions (H+) or hydroxide ions (OH-) in the solution.

When a strong acid and a strong base react, they undergo a neutralization reaction, producing salt and water.

For example, the salt sodium chloride (NaCl) is formed from the reaction between hydrochloric acid (HCl), a strong acid, and sodium hydroxide (NaOH), a strong base. NaCl is a neutral salt and will not affect the pH of a solution, hence a pH value of 7 indicates neutrality.