solubility

Question

The solubility of most solid substances in water increases with:

RankGuru · Accepted Answer

The effect of temperature on solubility is governed by **Le Chatelier's Principle**.
- For a majority of solid solutes, the dissolution process is **endothermic** (Heat is absorbed; $\Delta H_{soln} > 0$).
- Increasing the temperature provides energy to the system, causing the equilibrium to shift in the forward direction (more dissolving) to consume the excess heat.
- Therefore, solubility generally increases with an **increase in temperature** for such substances. Pressure has negligible effect on the solubility of solids.

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solubility

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