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▪ sodium → group 1A → +1 charge → K+
▪ sulfide → group 6A → -2 charge → S2-
▪ nitrate → polyatomic ion → -1 charge → NO3-
Salt is neutral → overall charge = 0
Overall charge = Cd + NO3-
0 = Cd + (-1 x 2)
0 = Cd +
+2 Cd = +2
▪ cadmium → +2 charge → Ni2+
The accompanying photo shows the reaction between a solution of Cd(NO3)2 and one of Na2S.
What is the identity of the precipitate?
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