Balanced net ionic equation?

Question

Write the balanced net ionic equation for each of these acid-base reactions. Enter the formula of the cation (if any) first, then neutral species (if any), followed by the anion (if any) with coefficients (if needed; do not include 1 as a coefficient). Put charges (if any) in parentheses (multiple first, if any, followed by sign) and phase in parentheses, e.g., Al3+(aq) should be entered as Al(3+)(aq). In each case, write the formulas of the spectator ions.

HBr(aq) + NH3(aq) ?
ive got a part of this

____+ NH3(aq) ---> NH4(+)(aq) +______

HClO(aq) (a weak acid) + NaOH(aq) ?
i got part of this too
HClO(aq) + ______---->______ + _______

HClO4(aq) + Ca(OH)2(aq) ?
i got a part of this one too

H3O(+)(aq) + ________ -----> ________

Identify the spectator cation= Ca(2+)(aq)
what is the spectator anion= i have no idea

Answer 1

(1) H+(aq) + NH3(aq) ---> NH4(+)
the spectator anion: Br-

(2) HClO(aq) + OH-(aq) ---> H2O + ClO-(aq)
the spectator cation: Na+

(3) H+(aq) + OH-(aq) ---> H2O
the spectator cation: Ca++
the spectator anion: ClO4-