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In: Chemistry

Consider the system in which the mineral fluorite, CaF 2 , dissolves in water. The resulting...

Consider the system in which the mineral fluorite, CaF 2 , dissolves in water. The resulting
fluoride ion reacts with water to give HF. We are looking for the solubility of CaF 2 .
a. Write the pertinent chemical reactions. The hydrolysis of water is considered a
pertinent reaction in this system.
b. Write the charge balance. Include all of the charged species in all of the chemical
equations written above.
c. Write the mass balance.
d. Write the equilibrium expressions for each of the chemical reactions written above.
e. How many equations have you written? How many unknowns are there?
f. Solve the system of equations for the solubility of fluorite. It is not a simple
proposition to solve a system of five equations simultaneously. Consider what the
equilibrium system would look like if the pH were fixed at 3.00. Try solving the
equations now. It should now be a system of just three equations, which is much
easier.

Solutions

Expert Solution

queen_honey_blossom answered 9 months ago
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