Problem 3.14

Write balanced equations to correspond to each of the following descriptions:

This problem is pretty good evidence that you need to understand how to name ionic and molecular compounds and acids......

(a) When sulfur trioxide gas reacts with water, a solution of sulfuric acid forms.

SO3(g) + H2O(l) --> H2SO4(aq)

(b) Boron sulfide, B2S3(s), reacts violently with water to form dissolved boric acid, H3BO3, and hydrogen sulfide gas.

B2S3(s) + 6H2O(l) --> 2H3BO3(aq) + 3H2S(g)

(c) Phosphine, PH3(g) combusts in oxygen gas to form water vapor and solid tetraphosphorus decaoxide.

4PH3(g) + 8O2 --> 6H2O(l) + P4O10(s)

(d) When solid mercury (II) nitrate is heated, it decomposes to form solid mercury (II) oxide, gaseous nitrogen dioxide, and oxygen.

2Hg(NO3)2 --> 2HgO(s) + 4NO2(g) + O2(g)

(e) Here is the reaction - balance it yourself!

Cu(s) + H2SO4(aq) ----> CuSO4(aq) + SO2(g) + H2O(l)

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Doug Chapman 7/17/14