Monday, September 1, 2008

EEI (acids)

Any questions you may have can be asked here provided they would benefit each topic. I will not tell you specific details about milk going off for example but I will provide general feedback that will benefit everyone.

Sunday, March 16, 2008

Is purified recycled water a solution to the current water shortage?

Purified recycled water is suggested as a solution to falling water supplies. Discuss the processes that wastewater undergoes before it is returned to a dam or a river to be re-used.

Is desalination a feasible process to provide water to a large city such as Brisbane?

Fresh water can be obtained from sea water by desalination. There are several processes by which this can be done. Discuss these, giving examples of where they are in use.

Planting trees is the solution to re-habilitating the land.

Salinity, acidity and sodicity are major problems being confronted by Australian rural communities. Discuss why these processes decrease productivity of agricultural crops.

Compare the effectiveness of washing clothes in soaps or detergents with dry cleaning.

Soaps and detergents are used to clean clothes. Discuss the chemical action of these substances.

Compare the effectiveness of washing clothes in soaps or detergents with dry cleaning. In your essay, refer to specific stains and fabrics.

Should Brisbane’s water supply be fluoridated?

Discuss the processes that are used in a water treatment plant to produce water that is suitable for drinking.

Fluoridation of water supplies has been a topic of debate for many years. What effect does fluoridation have on teeth?

Is chlorination or ultra-violet radiation the preferred option for treating water for a large city?

Discuss the processes that are used in a water treatment plant to produce water that is suitable for drinking. Discuss the advantages and disadvantages of chlorination and UV as the final stage in the treatment process.