4. Write the balanced net ionic equations for the reactions that occur in each o

Question

4. Write the balanced net ionic equations for the reactions that occur in each of the following cases. Identify the spectator ion or ions in each reaction.
a. Cr2(SO4)3(aq) + 3(NH4)2CO3 (aq) =====? Cr2(CO3)3 ( s) + 3(NH4)2SO4 ( aq)
b. Ba(NO3)2 (aq)+ k2SO4(aq)======?BaSO4(s) + 2KNO3(aq)
c. Fe(NO3)2 (aq) + 2KOH(aq)=====?2KNO3(aq) + Fe(OH)2 (s)

Explanation / Answer

a. Cr2(SO4)3(aq) + 3(NH4)2CO3 (aq) =====> Cr2(CO3)3 ( s) + 3(NH4)2SO4 ( aq) Cr2(SO4)3 (aq) + (NH4)2CO3 (aq) -------> 2Cr+3 (aq) + 3 (CO3)-2 (aq) -------> Cr2(CO3)3 (s) spectator ion or ions in this reaction.(SO4-2 & NH4)+1 b. Ba(NO3)2 (aq)+ k2SO4(aq)======?BaSO4(s) + 2KNO3(aq) Ba(NO3)2 (aq) + K2SO4 (aq) -> Ba+2 (aq) + (SO4)-2 (aq) -> BaSO4 (s) the spectator ion or ions.......(NO3)-1 & K+1 c. Fe(NO3)2 (aq) + 2KOH(aq)=====>2KNO3(aq) + Fe(OH)2 (s) Fe(NO3)2 (aq) + KOH (aq) -> Fe+3 (aq) + 3(OH)-1 (aq) -> Fe(OH)3 (s) the spectator ion or ions.......(NO3)-1 & K+1

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