Question

1.) Write the balanced chemical equation for the reaction of solid cobalt(III) sulfide with hydroiodic acid producing aqueous cobalt(III) iodide and hydrosulfuric acid .

2.)Identify the precipitate formed when an aqueous solution of (NH₄)₂CO₃ is mixed with an aqueous solution of Hg₂F₂. Enter as a chemical formula.

3.)Enter the balanced chemical equation for the reaction that occurs when an aqueous solution of (NH₄)₂CO₃ is mixed with an aqueous solution of Hg₂F₂. Include all phases

4.)Write the balanced complete ionic equation for the reaction of potassium hydroxide and hydrofluoric acid in aqueous solution.

Answer 1

Q1.

Co2S3(s) + HI(aq) --> CoI3(aq) + H2S(aq)

balance Co

Co2S3(s) + HI(aq) --> 2CoI3(aq) + H2S(aq)

Balance I

Co2S3(s) + 6HI(aq) --> 2CoI3(aq) + H2S(aq)

Balance H

Co2S3(s) + 6HI(aq) --> 2CoI3(aq) + 3H2S(aq)

Q2.

precipitate fmed when:

(NH4)2CO3 = NH4+ and CO3-2

Hg2F2 -- Hg2+2 and 2F-

clearly,

Hg2CO3 will form a preciitate

Q3.

(NH4)2CO3(aq) + Hg2F2(aq) --> Hg2CO3(s) + 2NH4F(aq)

Q4.

complete ionic:

KOHaq) + HF(aq) = H2O(l) + KF(aq)

split ions for complete ionic

K+(aq) + OH-(aq) + H+(aq) + F-(aq) = H2O(l) + K+(aq) + F-(aq)