he mixing of which pair of reactants will result in a precipitation reaction?
K 2 SO 4 (aq)+Co(NO 3 ) 2 (aq)
Ni(NO3) 2 (aq) +L i2 CO3 (aq)
NH 4 Br(aq)+NH 4 l(aq)
LiClO 4 (aq)+(NH 4 )2S(aq)
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