Topic 15: Chromium lore

Show equations displaying the amphoteric nature of chromium hydroxide

What type of reactions are these?

NOT ligand exchange reactions, these are acid-base reactions. Products are chemically changed through addition or removal of H⁺ ions.

What are the steps for making chromium ethanoate?

1. Reduce acidified sodium dichromate (VI) using zinc

2. React sodium ethanoate with Cr²⁺

What is the equation for this step: Reduce acidified sodium dichromate (VI) using zinc? State any colours

What is the equation for this step: React sodium ethanoate with Cr²⁺? State any colours

What are the conditions needed for making chromium ethanoate and why?

Experiment must be done in inert conditions,

What type of atmosphere is usually used for this experiment?

Nitrogen atmosphere