Answer :
Final answer:
To find the molar concentrations of Li, Al, and F ions, calculate the number of moles of each compound and consider their dissociation ratios. The molar concentration of lithium ions is 1.496 mol/L, aluminum ions is 1.742 mol/L, and fluoride ions is 5.226 mol/L.
Explanation:
To determine the molar concentrations of lithium, aluminum, and fluoride ions in the solution, we first need to calculate the number of moles of each compound. We can use the formula: number of moles = mass / molar mass.
For LiF, the number of moles = 38.8 g / 25.94 g/mol = 1.496 mol. Since LiF dissociates into 1 lithium ion and 1 fluoride ion, the molar concentration of lithium ion is also 1.496 mol/L.
For AlF3, the number of moles = 146.5 g / 83.98 g/mol = 1.742 mol. Since AlF3 dissociates into 1 aluminum ion and 3 fluoride ions, the molar concentration of aluminum ion is 1.742 mol/L and the molar concentration of fluoride ion is 3 * 1.742 mol/L = 5.226 mol/L.
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