Question

I needed what Cr the metal is soluble and insoluble in and inks was supposed to be links.

Answer 1

Cr is soluble in HNO3. It is not soluble in water.

Here is a link that gives a lot of general information, including some chemistry.
http://en.wikipedia.org/wiki/Chromium

Here is a link that gives some specifics. If this isn't what you need, please reply with more specific information.
http://www.webelements.com/chromium/