PAG 4.1 Identifying unknowns help please?

I did an experiment to identify unknown ions in mixture A and I've attached images of the sheets.

For step 9 on procedure part 1 I've identified the ions as Cl- but I can't identify the 2nd negative ion.
For step 10 I wrote the equation Ag+ (aq) + Cl-(aq) --> AgCl (s) but I don't know the 2nd equation.

Also for step 5 on procedure part 2 I identified the ion as Ba2+ but I'm not sure what the formula is.

Thank you!

Warning - sideways attachments, danger of neck strain ...

Haha sorry I took the pictures on my phone in portrait. I'm not sure why their came out sideways when I attached them.
I'll try again here.

Warning - assessed coursework - do it yourself.

Did you ever find out what they were, im stuck on the same topic

My practical book is at school but I think I remember them. In part 1 the chloride ions in silver chloride produced a white precipitate. The other ion is carbonate ions which fizzed.For part 2 sulfate ions in barium sulfate produced a white precipitate.

Did mixture A contain BaCl2 and BaCO3?

Hi guys I missed the practical and i'm doing it on this Thursday, in the PAG 4 booklet what types of questions where there and how many were there?

Honestly don't know, its qualitative analysis of anions and cations. My teacher said that he's going to reorder it and some people haven't also done it.