What is the action of litmus on ferric chloride solution and why? Share with your friends Share 4 Raveena Sharma answered this Solution of ferric chloride is acidic; therefore, blue litmus will change to red in this solution. -3 View Full Answer Ranbbir Singh Thakur answered this red litmus into blue -1 George Pitt answered this FeC12 is a salt , hence there is no reaction of it on litmus. -1 Dibyani Swain answered this red into blue -4 Raj Harshit answered this litmus has no reaction in it -2 Tapan Sarkar answered this i dont know -4