Net Ionic Equation - DAT Achiever #1 - Problem #70

[dudewhensmydat]

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Can someone please explain the reasoning behind the answer to this problem - I honestly don't get it (in my defense I've been studying all day and am starting to space out).

Question: What is the net ionic equation for the reaction between FeS and HCl?

Answer:

A) FeS(s) + 2H+(aq) --> H2S(g) + Fe2+(aq)

For the explanation it shows 2 Cl-(aq) on the reactant and product side (but crossed out with a line through them b/c they're spectator ions).

When I was working on the problem, I had the balanced equation look like this:

FeS(s) + 2HCl --> H2S(g) + FeCl2.

😕

 

[electron]

you dont count the CL- because its a spectator ion. Check out the oxidation numbers, cl starts at -1 and ends at -1 which means it doesnt belong in the net ionic equation. Your doing everything right....just get rid of those cl-'s...hope that helped