Question

Why is Zinc chromate bright yellow?

Answer 1

Zinc chromate:

1. Zinc chromate has a chemical formula ${\mathrm{ZnCrO}}_4$.
2. It is utilized in rust-inhibiting paints, artists' colors, varnishes and lacquers, and linoleum production.
3. The brightly yellow-colored Zinc chromate is formed by the reaction of Zinc oxide $\left(\mathrm{ZnO}\right)$ and Potassium dichromate $\left({\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7\right)$.

$\mathrm{ZnO}\left(\mathrm{s}\right)\stackrel{{\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7}{\to }{\mathrm{ZnCrO}}_4\left(\mathrm{s}\right)$