2 There is a saying that like dissolves like At OC CO2 has s

2. There is a saying that \"like dissolves like.\" At O°C, CO2 has solubility in water of 0.35 g CO2/100g H:O, while the solubility for SO2 is 22.8 g SO2/100g H:O. In light of your O2 and SO: structures, and that of water, why might there be this great difference? 3. In the structures you have drawn so far, what seems to be the most important factor that governs the shape of the molecule? C. Resonance Structures (table for your drawings below) 1. Draw Lewis structures for the following three ions and note the number of valence electrons in each. How do their structures compare? Phosphate, PO Sulfate, SO Perchlorate, CIO4 2. What does it mean when we say that two species are isoelectronic?

Solution

2) SO2 has a bent strcuture due to the lone pair of electrons on sulphur and cause the dipole moments. It is polar as a result.
CO2 has no lone pair of electrons and has the straigh charge with the charge symetrically distributed and there is no polarity.

H2O also has the bent structure and is polar becuase of the dipole moments caused by the lone pairs on the hydrogen and polar solvents are better at dissolving the poolar solvents.

Hence SO2 is more soluble in H20 than CO2.

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