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The process usually involves carbon dioxide under high pressure. When the pressure is reduced, the carbon dioxide is released from the solution as small bubbles, which causes the solution to become effervescent, or fizzy. A common example is the dissolving of carbon dioxide in water, resulting in carbonated water.hen the pressure is reduced, the carbon dioxide is released from the solution as small bubbles, which causes the solution to become effervescent, or fizzy. A common example is the dissolving of carbon dioxide in water, resulting in carbonated water.
Quick Answer. According to a 1963 study at Harvard University, carbon dioxide, bicarbonate and carbonate act as buffers to fluctuating hydrogen ion concentrations in natural sources of unprocessed water, helping the water maintain a relatively constant pH. Since the concentrations of buffer chemicals are low, outside forces also influence water pH. Keep Learning.