SrF₂ write the equilibrium equation for the acid or base that exists when the salt is dissolved in an aq solution.

Question

Determine if the following salt is neutral, acidic or basic. If acidic or basic, write the appropriate equilibrium equation for the acid or base that exists when the salt is dissolved in aqueous solution. If neutral, simply write only NR. Be sure to include the proper phases for all species within the reaction.

 SrF₂

Answer 1

SrF2 is the salt formed from a strong base, Sr(OH)2 and a weak acid HF. A solution of this salt will therefor have a basic pH (>7).

SrF₂(aq) <==> Sr²⁺(aq) + 2F^-(aq)

F^-(aq) + H₂O(l) <==> HF + OH^- .. equilibrium equation for base that exists when salt is dissolved

Note: formation of a weak acid (HF) and a STRONG base (OH^-), makes the solution basic.