What Compounds Can Dissolve in Water? Understanding Solubility and Polar Molecules
Discover which compounds dissolve in water and why polarity and hydrogen bonding affect solubility in this detailed explanation.
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Ionic compounds and polar molecules typically dissolve in water. Water, known as a 'universal solvent', dissolves more substances than any other liquid due to its highly polar nature. Salts, sugars, and alcohols are common examples that dissolve in water, resulting in a homogeneous solution. The ability of a compound to dissolve depends on its ability to form hydrogen bonds with water molecules, where the rule of thumb is 'like dissolves like'. Non-polar substances, such as oils and fats, do not dissolve well in water.
FAQs & Answers
- Why do ionic compounds dissolve in water? Ionic compounds dissolve in water because water molecules surround and separate the charged ions due to their polarity, allowing the compound to disperse evenly in the solution.
- What does 'like dissolves like' mean in solubility? 'Like dissolves like' means compounds with similar polarity dissolve well in each other, so polar substances dissolve in polar solvents like water, while non-polar substances dissolve in non-polar solvents.
- Why don't oils dissolve well in water? Oils are non-polar substances and cannot form hydrogen bonds with water molecules, so they do not dissolve well in water, which is polar.