Which chemical equations show a precipitation reaction? Use the solubility rules to help you. Select all the correct answers.
1) Ca(NO₃)₂ + MnSO₄ → CaSO₄ + Mn(NO₃)₂
2) MgBr₂ + 2KCl → MgCl₂ + 2KBr
3) 2NaOH + MgCl₂ → 2NaCl + Mg(OH)₂
4) 3FeCl₂ + 2AlBr₃ → 3FeBr₂ + 2AlCl₃
5) 2HI + ZnBr₂ → 2HBr + Znl₂
