Which of the following ions will always be a spectator ion in
a p...

Question

Which of the following ions will always be a spectator ion in
a precipitation reaction?
(a) Cl-
(b) NO3-
(c) NH4+
(d) S2-
(e) SO42-

Accepted Answer

Hello everyone. So in this question were given several statements about spectator ions in a precipitation reaction. So, key words I want you guys to kind of keep in mind will be Spectator ions and precipitation reaction. So let's go ahead and talk about this a little bit more. Let's put an asterix. So, precipitation. So in chemistry, precipitation is when an insoluble solid forms in a dissolved solution. So in saw you both solid made from what to say acquis solution. And then the other key word was spectator ions. So spectator ions are ions that don't participate in a chemical reaction and are present on both of the starting region side and the product side. So I just put repeated ions on both sides of chemical reaction. Okay, so with these two kind of brief definitions, we can see out of A, B, C and D. That our answer is actually going to be A And why is it A? It's because N. 03 minus and NH four are always spectator ions since all of their salts are soluble in water. And how we know this is by the Celje bility rules. So if we know those, we know that A is going to be our answer for this question

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