What is effect of temperature on solubility of solids in water? Give examples.

Fish generally needs ${\mathrm{O}}_2$ concentration in water at least $3.8 \mathrm{mg} {\mathrm{L}}^{-1}$ for survival. What partial pressure of ${\mathrm{O}}_2$ above the water is needed for the survival of fish? Given the solubility of ${\mathrm{O}}_2$  in water at $0^{°} \mathrm{C}$ and $1 \mathrm{atm}$ partial pressure is $2.2\times {10}^{-3} \mathrm{mol} {\mathrm{L}}^{-1} \left(0.054 \mathrm{atm}\right)$?

A solution of citric acid ${\mathrm{C}}_6{\mathrm{H}}_8{\mathrm{O}}_7$  in $50 \mathrm{g}$ of acetic acid has a boiling point elevation of $1.76 \mathrm{K}$. If ${\mathrm{K}}_{\mathrm{b}}$ for acetic acid is $3.07 \mathrm{K} \mathrm{kg} {\mathrm{mol}}^{-1}$. What is the molality of solution?

An aqueous solution of a certain organic compound has a density of $1.063 \mathrm{g} {\mathrm{mL}}^{-1}$, an osmotic pressure of $12.16 \mathrm{atm}$ at ${25}^{° }\mathrm{C}$ and a freezing point of $-1.{03}^{°} \mathrm{C}$.  What is the molar mass of the compound? ${\mathrm{K}}_{\mathrm{f}}$ of water is $1.86 \mathrm{K} \mathrm{kg} {\mathrm{mol}}^{-1}$.