21. For each of the following precipitation reactions,
complete and balance the equation, indicating
clearly which product is the precipitate. If no reaction
would be expected, so indicate.
a. (NH4)2SO4(aq) + Ba(NO3)2(aq) →
b. HS(aq) + NiSO4(aq) →
c. FeCl3(aq) + NaOH(aq) →
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