Answer:
To determine the mass of KF in the solution, we can use the formula:
mass = molarity x volume x molar mass
First, we need to calculate the molar mass of KF:
KF = K + F
= 39.10 g/mol + 18.99 g/mol
= 58.09 g/mol
Now, we can plug in the values:
mass = 0.652 mol/L x 723.4 mL x 0.05809 g/mol
= 26.76 g
Therefore, there are 26.76 g of KF in the solution.