How would one write balanced chemical, complete ionic, and net ionic equations for the reactions between the following substances, which produce a gas?

a. hydrochloric acid and aqueous sodium cyanide, with production of hydrogen cyanide gas (HCN)
b. sulfuric acid (H2SO4) and aqueous rubidium sulfide, with production of hydrogen sulfide gas

Thank you for trying to help me out! Let's just say that chemistry is not my strongest subject! :)

1 Answer
anor277
Apr 5, 2017

a. HCl(aq)+NaC≡N(aq)→HC≡N(g)↑⏐+NaCl(aq)

Explanation:

And ths would be a dangerous reaction to do, in that you produce volatile hydrogen cyanide........

b. H2SO4(aq)+Rb2S(aq)→H2S(g)↑⏐+Rb2SO4(aq)

And this would be a bit less dangerous, but still hydrogen sulfide is mighty smelly.

We write (aq) to represent the aquated ion in aqueous solution. For instance NaCl(aq) would probably be the aquated ions, [Na(OH2)6]+ and [Cl(H2O)4−6]−.

When we write HCl(aq), in solution we likely have H3O+ (or a cluster of water molecules with an extra H+), and chloride ion, Cl−, which again is surrounded by, or solvated by several water molecules.

And as a result the net ionic equations are:

c. H3O++−C≡N→HC≡N(g)↑⏐+H2O(l)

d. 2H3O++S2−→H2S(g)+2H2O(l)

You will have to supply the chemical equations..........

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