For each reaction, identify the precipitate, or lack thereof. 2nacl(aq)+ba(oh)2(aq)⟶bacl2+2naoh naoh bacl2 no precipitate agclo3(aq)+mgi2(aq)⟶agi+mg(clo3)2

1) Answer is: no precipitate.
Chemical reaction: 2NaCl + Ba(OH)₂ → BaCl₂ + 2NaOH.
Barium chloride is salt that dissolves in water, sodium hydroxide is strong base that dissolves in water. This is example of double replacement reactions(double displacement or metathesis reactions), two ionic compounds are exchanged, making two new compounds.

2) Answer is: AgI.
Chemical reaction: 2AgClO₃ + MgI₂ → 2AgI + Mg(ClO₃)₂.
Silver chloride form yellow precipipate, magnesium chlorate is salt that dissolves in water. This is also example of double replacement, Mafnesium has oxidation number +2 and siilver has oxidation number +1, iodine has -1 and chlorate also -1.