Does a reaction occur when aqueous solutions of chromium(II) sulfate and potassium hydroxide are combined?

Question

Does a reaction occur when aqueous solutions of chromium(II) sulfate and potassium hydroxide are combined? I have been trying this exercise but a cant get it well, I apreciatte your help.

Answer 1

This would be a double replacement reaction, if it were to occur.

CrSO₄(aq) + 2KOH(aq) ==> K₂SO₄(aq) + Cr(OH)₂(s)

According to the solubility rules, all of the species are soluble EXCEPT chromium hydroxide. Since a precipitate is formed, there will be a reaction, as written.