alculate the initial concentrations of Fe3 ions when these s

alculate the initial concentrations of Fe3+ ions when these solutions are mixed: 6.00 mL of 0.00180 M KSCN, 5.00 mL 0.240 M Fe(NO3)3 and 14.00 mL of 0.050 M HNO3.

Solution

The only source of Fe³⁺ ion in the given solution is Fe(NO₃)₃,so we can write it as

Fe(NO₃)₃ --> Fe³⁺ + 3NO₃^-

other given solutions are

6 ml of 0.0018 M of KSCN

5 ml of 0.24 M of  Fe(NO₃)₃

14 ml of 0.05 M of HNO₃

initail conc of Fe³⁺ = number of moles of  Fe(NO₃)₃/Total volume of the solution

=(5*0.24)/(6+5+14)=0.048M