[chelsss]

I really need help with this lab. My TA is a very harsh grader and I want to make sure I'm not making any errors or explaining something wrong

some questions are

Identify if its a chemical or physical change

a) A blue Cu (II) cation salt solution was mixed with a green Ni(II) cation salt solution and an aqua-colored solution occured.
- I think its a physical change because its just the two colors mixed together and something to do with both being cation salts?

b) A blue Cu(II) cation salt was heated; the salt turned white and drops of a colorless liquid thought to be water were observed on the neck of the test tube. Addition of a few drops of water formed a blue solution; when it was heated to evaporate excess water; the blue salt came back.
-Im guessing its physical because it can be returned to its previous state

c) A blue green cation salt was heated; a gas was seen escaping and the salt turned black
- Chemical change because there was an evolution of gas as well as a change in color


Help please!

[Hunter2]

I think all is correct.