Chemistry reactivity lab help?

In my lab, there're 10 different chemical that I pair them up and mixed them together.

For each reaction I have to write down the evidence of reaction, balanced equation and litmus test

I need help with writing balanced equation including the states of all the products.... and I'm not sure if the evidence of reaction and litmus test are right. Please help me !

Note: for the aqueous in this lab I added small amount of chemicals in water, and in reactions I added 5 drops of each solutions in the test tube of other solutions

For litmus test, I placed the red and blue litmus paper on top of the test tube (the instructions said so) and I'm not sure if that's right because most of the papers didn't turn to any color

Here are the results I got:

1.) NH4Cl (aq) + NaOH no evidence of reaction litmus paper didn’t change

2.) BaCl2 (aq) + Na2CO3 no evidence of reaction (I think this one is wrong, is it suppose to have white precipitate??) Litmus paper didn’t change

3.) CuSO4 (aq) + NH3 (l) white precipitate solids form blue paper tinted red

4.) NiCl2 (aq) + Na3PO4 (aq) white precipitate solids form litmus paper didn’t change

5.) Na2CO3 (aq) + HCl (l) strong smell litmus paper didn’t change

6.) HCl (l) + Mg (s) ** for this one I put 2cm of thin Mg metal in HCl solution

Mg dissolves in HCL, smell, and bubbles Blue paper tined red

7.) NaOH (l) + HCl (l) temperature increased for 1C (really little change) litmus paper didn’t change

8.) Mg (s) + fire(using propane gas and aiming for blue color of fire) Mg burned and produces white bright light left with white ashes (I’m pretty sure this one is right)

Please help me to do this lab correctly, I think it's okay of the evidence of reaction is not right but I really need help with balancing equations and litmus test

Thanks! :)