The colorless gas phosphorus trifluoride reacts slowly with water to give a mixture of phosphorus acid and hydrofluoric acid . (a) Write a balanced chemical equation for this reaction. + + (b) Determine the concentration (in moles per liter) of each of the acids that result from the complete reaction of 5.71×10-2 moles of phosphorus trifluoride with enough water to give a solution volume of 711 mL. phosphorus acid : M hydrofluoric acid : M

The balanced chemical reaction is given as:

b) Concentration of phosphorus acid is 0.0803 M.

Concentration of hydrofluoric acid is 0.241 M.

Explanation:

a) The balanced chemical reaction is given as:

b)

Moles of phosphorus trifluoride gas =

According to reaction, 1 mole of phosphorus trifluoride gives 1 mole of phosphorus acid, then of phosphorus trifluoride will give:

of phosphorus acid

Volume of the solution = V = 711 mL = 0.711 L ( 1 mL = 0.001 L)

Concentration of phosphorus acid :

Concentration of phosphorus acid is 0.0803 M.

According to reaction, 1 mole of phosphorus trifluoride gives 3 mole of hydrofluoric acid, then of phosphorus trifluoride will give:

of hydrofluoric acid

Volume of the solution = V = 711 mL = 0.711 L ( 1 mL = 0.001 L)

Concentration of hydrofluoric acid :

Concentration of hydrofluoric acid is 0.241 M.

the answer to this question is 3.