An aqueous solution of silver nitrate, AgNO3, reacts with an aqueous solution ammonium carbonate, (NH4)2CO3. What are the spectator ions for the reaction?
AgNO3 (aq) + (NH4)2CO3 ->
A 17.5 mL sample of hydrochloric acid HCl solution required 29.6 mL of 0.250M Ba(OH)2 for neutralization. The concentration of hydrocholoric acid was ____ M
Molarity = moles/volume
The Attempt at a Solution
For the first one I wrote out what I thought the chemical reaction was
AgNO3 (aq) + (NH4)2CO3 -> AgCO3 + (NH4)2NO3, this is already balanced so separating out the ions would give Ag+ and CO32- as the spectator ions, but this isn't true. The spectator ions are actually NH4+ and NO3- and I have no clue where that comes from.
For the second all I could think of was finding the moles of Ba(OH)2 by multiplying (0.25) and 29.6 mL, but I don't even know what to do with that number.