Question

1. (a) Write balanced molecular equations for the following potential precipitation reactions. Indicate the states of reactants and products [(aq) or (s)]. (b) In those cases where a precipitate forms, write the net ionic equation. If there is no reaction, state "No reaction." (i) MgCl2 (aq) + Hg2(NO3)2 (aq) → (ii) KOH (aq) + Mn(CH3CO2)2 (aq) → (iii) K2CO3 (aq) + Ni(NO3)2 (aq) → (iv) K2SO4 (aq) + Ni(NO3)2 (aq) →

Answer 1

i Macla (ar) + Hg, (NO 3) (ar) a. The balanced molecular equation can be given as - Mgela (as) + Hg (NO3), (az) Hg cl, (s) + Mg(NO3) (98) b Here in the above case a precipitate Hg ₂ (s) is formed. The complete ionic equation for the above equation can be given as Mg?* cog) + 24" (02) + Hug 24 (22) + 2 N6; (as) Hg, c2 (5) + Mg* (22) + 2 No, (cm Thus the net ionic equation can be given as - Hgh (ar) +20 (ar) Hg c/ 2 (s)

0 0 KOH (as) + Mn (CH3 CO₂) (ar) - a The balanced molecular equation can be given as - 2KOH (ar) + Mn (CH3 CO2)2 (as) - 2 CHg cook + Mn (0H) (s) (da) 2 + The complete ionic equation - 27 + 2014- (aq) + Mu (aq) + 2 et3 cos (ar) - 2 Cha Lob- (aq) + 2K+ (09) & MM (OH)2 (3) Thus the net ionic equation can be given as - Moht (aq) + 2 öt (ar) In (OH) (3) o Ka CO₂ (ar) & NINO) (ar) - The balanced chemical equation can be given as - Kecoa (ar) + Ni (NO3)2 (ar) Nicoz (s) + 2 KNO3 (ar)

med. 21 b. A precipitate of Nicoz (s) is fore- The complete ionic equation is - 2K (ar) & co (as) + Ni?" (aq) + 2007 (12) - Nico, (s) + 24 (ar) + 286 (0) Thus the net ionic equation is- No2+ (ar) & coz (ar) Nicoz (3) V K₂ 504 (ar) + Ni(NO3) (as) . The balanced molecular equation can be given as - K.50 (as) + Ni (NO3) (as) Niso (ar) + 2K NO₃(aq) b. No precipitate. Hence, "no reaction".