CM8001

Desalination is not widely used because the process requires a lot of energy, making it expensive to produce drinking water.

The water-soluble vitamins would be expected to be polar because “like dissolves like”. As water is a polar molecule, a water-soluble molecule would be expected to be polar, too. Fat-soluble vitamins would not be polar.

a. Air drying the laundry will avoid us using dryers. This will reduce the electricity consumption, which will allow us to burn less coal as a result and reduce the SO2 emission.

b. Walk, bike or take public transport will reduce the number of cars on the road. This will reduce the use of petrol, which will reduce the emission of nitrate oxides.

c. Reduce the number of times of using the appliances will reduce the use of electricity. This will allow us to burn less coal, which will reduce the amount of SO2 emission.

d. More heat can be stored and conserved in the water heater. This will avoid using electricity again to reheat the water.

e. Buying food that are locally grown can save the environment by reducing the pollution caused in the process of transportation; plane, ship, lorry will consume diesel and emit CO2 and NO2.

a. Coal fire plants release colossal amounts of water vapor along with the combustion process. The hydrogen and the carbon in the coal make at least twice the amount of water as the coal burnt when vapor is cooled it becomes visible as fog and becomes “smoky”.

b. The natural pH of rain is 5.4 (from lecture slides). Since the rain in the park is 10 times more acidic than natural, its pH is 1 less. Hence, it has a pH of 4.4.