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The equilibrium expression for a reaction is Keq=[H+]6[Bi2+]2[H2S]3
Which of the following could be the reaction?

6H+(aq) + BiS(s) 2Bi2+(aq) + 3H2S(g)

2Bi2+(aq) + 3H2S(aq) Bi2S3(s) + 6H+(aq)

6H+(aq) + Bi2S3(s) 2Bi2+(aq) + 3H2S(g)

2Bi2+(aq) + 3H2S(aq) Bi2S3(aq) + 6H+(aq)

Question

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The equilibrium expression for a reaction is Keq=[H+]6[Bi2+]2[H2S]3
Which of the following could be the reaction?

6H+(aq) + BiS(s)  2Bi2+(aq) + 3H2S(g)

2Bi2+(aq) + 3H2S(aq)  Bi2S3(s) + 6H+(aq)

6H+(aq) + Bi2S3(s)  2Bi2+(aq) + 3H2S(g)

2Bi2+(aq) + 3H2S(aq)  Bi2S3(aq) + 6H+(aq)

photon336 · Answer

Where are the arrows to indicate the products?