Why does the reaction of Chromium and HCl turn the solution to green? And why does the reaction of Chromium and H2SO4 (sulfuric acid) turn the solution to bluish green? Does anyone know???
2007-11-16 07:47:40 · 3 answers · asked by curious 1 in Science & Mathematics ➔ Chemistry
Cr +2HCl--->CrCl2 +H2(g)
chromium compounds are green-blue
Cr +H2SO4--->CrSO4 +H2
chromium sulfate is a different color than chromium chloride
Transition metals make colored solutions. The color is dependent on the metals and the nonmetal in the compound.
2007-11-16 07:56:21 · answer #1 · answered by science teacher 7 · 0⤊ 0⤋
Chromium Sulfuric Acid
2017-01-18 05:24:17 · answer #2 · answered by madel 4 · 0⤊ 0⤋
The reaction with HCl produces Cr+++ with Cl- ions in the coordination sphere. The Cl- ions interact with Cr+++ d-electrons to produce a green color. The product with H2SO4 has more H2O molecules in the coordination sphere. These interactwith the d-electrons to produce a purple color.
2007-11-16 07:54:45 · answer #3 · answered by steve_geo1 7 · 0⤊ 0⤋