Which of the following is a precipitation reaction? I. N2H4

Last updated: 7/23/2022

Which of the following is a precipitation reaction? I. N2H4 + 2H2O2 → N2 + 4H₂O II. ZnCl₂ (aq) + H₂ SO4 (aq) → ZnSO4 (aq) + HCl (aq) III. Ca(OH)2(s) Cao (s) + H₂O(l) IV. Mg(NO3)2(aq) + K₂SO4 (aq) → MgSO4 (s) + 2KNO(aq)