Question

Хром получил свое название из греческого языка из-за разнообразия окраски своих соединений. Какое из перечисленных соединений хрома имеет синию окраску? 1)CrO 2)Cr2O3 3)K2Cr2O7 4)KCl(SO4)2 * 12 H2O 5)CrO3

Answer 1

KCr(SO4)2 * 12 H2O------------светло-голубой порошок

Answer 2

The Origin of the Name "Chrome"

The name "chrome" is derived from the Greek word "chroma," which means color. This name was given to the element due to the variety of colors exhibited by its compounds.

Blue-Colored Compound of Chromium

The compound of chromium that exhibits a blue color is potassium dichromate (K2Cr2O7). This compound is known for its distinctive orange-red crystals, and when dissolved in water, it forms a solution with a deep blue color .

Therefore, among the listed compounds, the one that has a blue color is K2Cr2O7.