Answer: 0.635 M
Explanation:
Molarity : It is defined as the number of moles of solute present per liter of the solution.
Formula used :
[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]
where,
n= Moles=[tex]\frac{\text{Given mass}}{\text{Molar mass}}=\frac{5.15g}{162.4g/mol}=0.0317moles[/tex]
[tex]V_s[/tex] = volume of solution = 150 ml
[tex]Molarity=\frac{0.0317\times 1000}{150ml}=0.2114M[/tex]
[tex]FeCl_3\rightarrow Fe^{3+}+3Cl^-[/tex]
as 1 mole of [tex]FeCl_3[/tex] gives 3 moles of [tex]Cl^-[/tex] ions
Thus molarity of [tex]Cl^-[/tex] = [tex]3\times 0.2114=0.635M[/tex]
Molarity of [tex]Cl^-[/tex] = 0.635 M
