Question

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

Answer 1

Answer:

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.