Potassium thiocyanate is the chemical compound with the molecular formula KSCN. It is an important salt of the thiocyanate anion, one of the pseudohalides. The compound has a low melting point relative to most other inorganic salts. Use in chemical synthesis.Mercury(II) thiocyanate is a general reagent to catalyze the addition of thiocyanic acid (HSCN) across the triple bond of a variety of alkynes. It is also used in the synthesis of manganese mercury thiocyanate, an organometallic nonlinear optical crystal and mercury-based coordination polymers. Packaging 25, 100 g in glass bottleDETERMINATION OF IRON (II), IRON (III) AND TOTAL IRON IN SOLUTION USING FIA AND AAS. Objective: 1. To understand the principles and working characteristics of atomic absorption. 2. To determine the concentrations of iron (II), iron (III) and total iron in standards, unknown sample and tap water. 3. 2O, ferrous ammonium sulfate hexahydrate, is dissolved in a slightly acidic solution, excess oxalic acid is added, and the following reaction takes place: 1: Fe(NH 4) 2(SO 4) 2 • 6H 2O + H 2C 2O 4 FeC 2O 4(s) + H 2SO 4 + (NH 4) 2SO 4 + 6H 2O(l) Ferrous oxalate, FeC 2O 4, is a ﬁnely divided precipitate and tends to be colloidal.