1. The pH of natural water and the effects of global warming a) It is a well-known...

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Chemistry

1. The pH of natural water and the effects of globalwarming

a) It is a well-known fact that the increase in atmosphericCO2 concentration will result in global warming. Such effects willlikely impact the pH of natural water and thereby the aquaticecosystem as well. Explain qualitively to your layman friendswhether pH of natural water will be increased or decreased based onacid-base equilibrium?

b) The current (Year 2013) atmospheric CO2 concentration is370 ppm. It is estimated that if we continue to exploit the worldâ€™sfossil fuel reserves at the same rate, the atmospheric CO2concentration will reach 1,100 ppm in Year 2400 (Williams, 2001).Justify your answer in (1) quantitatively by calculating the pHswhen CO2 concentrations are 370 ppm (Year 2006) and 1,100 ppm (Year2400), respectively.

Assuming: Pure water is in equilibrium with CO2 at 25oC. Watervapor pressure is 0.031 atm. Henryâ€™s Law constant 3.38x10-2 (mol/L)x atm-1 at 25oC for CO2. Ka1 = 4.45x10-7; Ka2 = 4.69x10-11.

Neglect all other processes such as complexation, andprecipitation.

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4.1 Ratings (541 Votes)

A Carbonic acid H2CO3 which dissociates to a bicarbonate ion and a proton H Acidbase metabolism in our0 body is regulated by the following chemical equation CO2 H2O H2CO3 H HCO3 Formation of water ie from H and OH is an See Answer

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