Write a net ionic equation for the reaction of iron(III)chloride and potassium thiocyanate.
Fe+++ + CNS- ==> FeCNS++
This FeCNS++ complex ion is an intrnse red color.
To write the net ionic equation for the reaction of iron(III) chloride (FeCl3) and potassium thiocyanate (KSCN), you need to first write the balanced molecular equation and then determine the dissociated species in the ionic equation.
Here's how you can do it step by step:
Step 1: Write the balanced molecular equation:
FeCl3 + 3KSCN → Fe(SCN)3 + 3KCl
Step 2: Write the complete ionic equation by separating the strong electrolytes into their respective ions:
Fe^3+ + 3Cl^- + 3K+ + 3SCN^- → Fe(SCN)3 + 3K+ + 3Cl^-
Step 3: Remove the spectator ions (ions that appear on both sides of the equation) to obtain the net ionic equation:
Fe^3+ + 3SCN^- → Fe(SCN)3
The net ionic equation for the reaction between iron(III) chloride and potassium thiocyanate is Fe^3+ + 3SCN^- → Fe(SCN)3.
Note: The Fe(SCN)3 complex ion formed in this reaction is an intense red color.