1.) Write the balanced chemical equation for the reaction of solid cobalt(III) s

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.

Explanation / Answer

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)

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