Water and solubility
water is cycled around the earth constantly.
* when water evaporates it causes water vapours in the air.
*water vapour condenses and forms droplets in the clouds, these then fall as rain.
*many gases are dissloved in the rain
*dissolved oxygen is essential for aquatic life.
temperature should always be on x axis for solubility curves.
the solubility of gases in water:
* decreases as temperature increases.
*increases as pressure increases
*water that lathers easily with soap is said to be 'soft'
* hard water uses more soap to make a lather.
* dissolved salts in hard water react with soap to form insoluble solids…