Question

Sodium fluoride is added to pure water and stirred to dissolve. Compared to pure water, the new solution is__________.

Answer 1

Basic

Explanation:

`Sodium\ Fluoride\ +\ Water = Hydrogen\ Fluoride +\ Sodium\ Hydroxide`

`NaF + H_(2)O\rightarrow HF + NaOH`

Sodium fluoride, NaF, is a soluble salt that dissociates completely in aqueous solution to give sodium cations, Na+, and fluoride anions, F-

`NaF\rightarrow Na^(+) +F^(-)`

and when it dissolve in water the pH of the solution becomes greater than seven thereby becoming basic.