Hydrogen fluoride (HF) behaves as a weak acid in aqueous solution. Two equilibria influence which fluorine-containing species are present in solution.  HF(g)+H2​O(l)H3​O+(aq)+F−(aq)     $$Ka​=1.10×10−3 Is fluoride in pH 7.00 drinking water more likely to be present as F–(aq) or HF2–(aq)? Choose one: F- (aq) HF2- (aq) What is the equilibrium constant for this equilibrium? 2HF(g)+H2​O(l)H3​O+(aq)+HF−2​(aq)

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Hydrogen fluoride (HF) behaves as a weak acid in aqueous solution. Two equilibria influence which fluorine-containing species are present in solution. 

HF(g)+H2​O(l)H3​O+(aq)+F−(aq)     $$Ka​=1.10×10−3
Is fluoride in pH 7.00 drinking water more likely to be present as F(aq) or HF2(aq)?

Choose one:

F- (aq)

HF2- (aq)

What is the equilibrium constant for this equilibrium?

2HF(g)+H2​O(l)H3​O+(aq)+HF−2​(aq)
 
Ka=
 
What is the equilibrium concentration of HF2 in a 0.110  solution of HF?
      [HF2-]eq   
 
What is the pH at equilibrium of a 0.110M solution of HF?
     = pH   

 

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