triple chemistry- Water

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

Hard water
 
*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…