Parakeet - 9-1-2023 at 20:40
Chromium ion Cr3+ formes [Cr(OH)4]- in strong alkaline solution. However unlike aluminium, zinc and tin, as far as I
know, the metal does not dissolve in NaOH solution. Why is this?
DraconicAcid - 9-1-2023 at 22:37
I suspect it's because the Cr(OH)4 anion isn't as stable as the analogous aluminum or zinc ions.
Parakeet - 10-1-2023 at 05:56
Thanks for your thought! 
(Maybe I should have post this in the short questions thread. My apologies.)