Question

How do you determine if a compound is soluble or insoluble in water?

Answer 1

Its polarity.

Explanation:

Water is a polar compound, and only "like dissolves like". Meaning if the solute is a polar compound (in general, not intramolecular forces), then it will dissolve.

You can determine the general polarity by identifying its molecular shape. If it's symmetrical, it is non-polar.

Hope this helps :)