which will not precipitate. Na2SO4 and Ni(NO3)2

which will not precipitate. Na2SO4 and Ni(NO3)2

 

 

When an aqueous solution of two compounds are mixed,

which will not precipitate?

1) Cr2(SO4)3 and (NH4)2CO3

2) Ba(NO3)2 and K2SO4

3) Fe(NO3)2 and KOH

4) Na2SO4 and Ni(NO3)2

 

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▶ 참고: 용해도 지침 [ https://ywpop.tistory.com/2942 ]

 

 

 

1) Cr2(SO4)3(aq) + 3(NH4)2CO3(aq) → 3(NH4)2SO4(aq) + Cr2(CO3)3(s)

Cr2(CO3)3(s) 침전

( 참고 https://ywpop.tistory.com/13632 )

 

 

 

2) Ba(NO3)2(aq) + K2SO4(aq) → 2KNO3(aq) + BaSO4(s)

BaSO4(s) 침전

( 참고 https://ywpop.tistory.com/14188 )

 

 

 

3) Fe(NO3)2(aq) + 2KOH(aq) → 2KNO3(aq) + Fe(OH)2(s)

Fe(OH)2(s) 침전

( 참고 https://ywpop.tistory.com/14026 )

 

 

 

4) Na2SO4 + Ni(NO3)2 → no reaction

 

 

 

답: 4) Na2SO4 and Ni(NO3)2