- Boiling the water should kill off most bacteria and pathogens. Conversely, we can use iodine tablets to make the water safe for consumption. Boiling requires time and fuel but is a rather inexpensive method of purifying water. On the other hand, iodine tablets are more expensive but are more convenient. Boiling is similar to the industrial distillation process, as it is the key process in this form of water purification.
2. Firstly, it is an energy intensive process which requires many resources. Secondly, it needs to be located near the sea in order to maximise transport efficiency which may not always be a viable option. These limitation are often overcome by using other water purification techniques.
3a. Corrosion of lead pipes or solder in drinking fountains or water storage tanks.
3b. No. There are separate pipes for drinking water and waste water. Furthermore, waste products from research activities should be specially handled and safely disposed of.
4. Water-soluble vitamins should be polar compounds while fat-soluble vitamins should be non polar. It is important to note that only polar solutes can dissolve in polar solvents such as water. Similarly, only non polar compounds can dissolve in non polar solvents such as fat. Therefore we can come to such a conclusion.