Pasig River Essay

Pasig River in Metro Manila is the main river connecting Manila Bay and Laguna de Bay. Tagalog civilization considered the river as cradle and witnessed both the history of the country and significant events to people in Manila City in their daily lives.

Nowadays, Pasig is no more than what it was. From being a source of food and livelihood, the river became the ‘dumping ground' of informal settlers living along the banks of the river and its tributaries and establishments surrounding the river. It also serves as a basin of water floods from Manila upstream areas, conduit to mitigate the flooding in most areas of Metro Manila and its dredging would increase the carrying capacity of the river. Lined up along both river banks are several oil depots, factories, and huge slums, producing most of the waste that flows on it. Ecologists have already pronounced the

Acidity may contribute to corrosiveness and influence chemical reaction rates, chemical speciation and biological process. The measurement also reflects a change in the quality of the source water. Strong mineral acids, weak acids such as carbonic acid, acetic acid and hydrolyzing salts such as iron or aluminum sulphates may contribute to the measured acidity.

Table 1. The Total Average of Acidity of Water Samples Retrieved from the Estero de Balete in Three Different Time Periods

TIME PERIOD TOTAL AVERAGE OF Acidity (ppm)

MORNING 147.17

NOONTIME 306.40

AFTERNOON 288.52

Table 1 shows the different time periods the water sample from Estero de Balete was collected. The morning sample has the highest acidity (computed in ppm). The water sample was titrated with a base (NaOH) and the indicator used in the titration of water sample was Phenolphthalein turns pink in basic solutions and colorless in acidic