Complete and balance each gas evolution reaction.

Question

Complete and balance each gas evolution reaction.

HI(aq)+K2S(aq)→

Express your answer as a chemical equation including phases.
My Answer:2HI (aq)+ K2S (aq) → 2KI (s)+ H2S (g)

But it says I am wrong "Check that you have properly identified all of the phases (states) in your answer."

Can someone please help me?

Answer 1

Your balanced chemical equation is correct. The only issue might be that the state of HI is given as (aq), which means it is dissolved in water and exists as ions. Therefore, you could also write the equation as:

2HI(aq) + K2S(aq) → 2KI(aq) + H2S(g)

Both forms of the equation are correct, but it depends on what level of detail is required by your instructor or the specific context of the problem.

Answer 2

Complete and balance each gas evolution reaction.

Your balanced chemical equation is correct. The only issue might be that the state of HI is given as (aq), which means it is dissolved in water and exists as ions. Therefore, you could also write the equation as:

KI is a solid; however, since the HI and K2S are solids in aq solution, KI will be aq and in solution also.